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Document and Entity Information Document (USD $)	12 Months Ended
Document and Entity Information Document (USD $)	Dec. 31, 2014	Mar. 20, 2015	Jun. 28, 2013
Document Information [Line Items]
Entity Registrant Name	Arrhythmia Research Technology Inc /DE/
Entity Central Index Key	0000819689
Current Fiscal Year End Date	--12-31
Entity Filer Category	Smaller Reporting Company
Document Type	10-K
Document Period End Date	Dec. 31, 2014
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	FY
Amendment Flag	false
Entity Common Stock, Shares Outstanding		2,779,439dei_EntityCommonStockSharesOutstanding
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$ 16,472,399dei_EntityPublicFloat

Consolidated Balance Sheets (USD $)	Dec. 31, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 209,398	$ 749,766
Restricted cash	0	1,000,000
Trade accounts receivable, net of allowance for doubtful accounts of $45,000 and $40,000, at December 31, 2014 and 2013, respectively	3,536,747us-gaap_AccountsReceivableNetCurrent	3,803,853us-gaap_AccountsReceivableNetCurrent
Inventories	2,514,241us-gaap_InventoryGross	2,335,291us-gaap_InventoryGross
Prepaid expenses and other current assets	519,582	513,197
Assets from discontinued operations	0	1,509
Total current assets	6,779,968us-gaap_AssetsCurrent	8,403,616us-gaap_AssetsCurrent
Property, plant and equipment, net	7,618,901us-gaap_PropertyPlantAndEquipmentNet	7,579,556us-gaap_PropertyPlantAndEquipmentNet
Intangible assets, net	134,022	184,517
Other assets	570,357us-gaap_OtherAssetsNoncurrent	185,595us-gaap_OtherAssetsNoncurrent
Total assets	15,103,248us-gaap_Assets	16,353,284us-gaap_Assets
Current liabilities:
Revolving line of credit, current portion	2,071,495	0
Equipment line of credit, current portion	0	85,387
Term notes payable, current portion	490,341hrt_Termnotespayablecurrentportion	335,760hrt_Termnotespayablecurrentportion
Accounts payable	1,857,156us-gaap_AccountsPayableCurrent	2,156,031us-gaap_AccountsPayableCurrent
Accrued expenses	405,975us-gaap_AccruedLiabilitiesCurrent	436,775us-gaap_AccruedLiabilitiesCurrent
Customer deposits	98,110us-gaap_CustomerDepositsCurrent	341,465us-gaap_CustomerDepositsCurrent
Deferred revenue, current	228,363us-gaap_DeferredRevenueCurrent	248,559us-gaap_DeferredRevenueCurrent
Performance guarantee liability	0hrt_PerformanceGuaranteeLiability	1,000,000hrt_PerformanceGuaranteeLiability
Liabilities from discontinued operations, current	320,056	319,787
Total current liabilities	5,471,496us-gaap_LiabilitiesCurrent	4,923,764us-gaap_LiabilitiesCurrent
Long-term liabilities:
Revolving line of credit, non-current portion	0	2,774,495
Equipment line of credit, non-current portion	0	538,707
Term notes payable, non-current portion	1,330,755hrt_Termnotespayablenoncurrentportion	1,179,709hrt_Termnotespayablenoncurrentportion
Subordinated promissory notes	445,452us-gaap_SubordinatedLongTermDebt	417,769us-gaap_SubordinatedLongTermDebt
Deferred revenue, non-current	610,430us-gaap_DeferredRevenueNoncurrent	172,316us-gaap_DeferredRevenueNoncurrent
Total-long term liabilities	2,386,637us-gaap_LiabilitiesNoncurrent	5,082,996us-gaap_LiabilitiesNoncurrent
Total liabilities	7,858,133us-gaap_Liabilities	10,006,760us-gaap_Liabilities
Commitments and Contingencies (Note 8)
Shareholders' equity:
Preferred stock, $1 par value; 2,000,000 shares authorized, none issued	0us-gaap_PreferredStockValue	0us-gaap_PreferredStockValue
Common stock, $.01 par value; 10,000,000 shares authorized; 3,926,491 issued, 2,778,339 and 2,722,239 outstanding at December 31, 2014 and 2013, respectively	39,265us-gaap_CommonStockValue	39,265us-gaap_CommonStockValue
Additional paid-in-capital	11,336,693us-gaap_AdditionalPaidInCapital	11,236,236us-gaap_AdditionalPaidInCapital
Treasury stock at cost, 1,148,152 and 1,204,252 shares at December 31, 2014 and 2013, respectively	(3,133,883)us-gaap_TreasuryStockValue	(3,272,808)us-gaap_TreasuryStockValue
Accumulated other comprehensive income	42,502	42,502
Accumulated deficit	(1,039,462)	(1,698,671)
Total shareholders’ equity	7,245,115us-gaap_StockholdersEquity	6,346,524us-gaap_StockholdersEquity
Total liabilities and shareholders’ equity	$ 15,103,248	$ 16,353,284

Consolidated Balance Sheet Parenthetical (Parentheticals) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Allowance for doubtful accounts receivable, current	$ 45,000	$ 40,000
Preferred stock, par value per share	$ 1	$ 1
Preferred stock, shares authorized	2,000,000us-gaap_PreferredStockSharesAuthorized	2,000,000us-gaap_PreferredStockSharesAuthorized
Preferred stock, shares issued	0us-gaap_PreferredStockSharesIssued	0us-gaap_PreferredStockSharesIssued
Common stock, par or stated value per share	$ 0.01	$ 0.01
Common stock, shares authorized	10,000,000us-gaap_CommonStockSharesAuthorized	10,000,000us-gaap_CommonStockSharesAuthorized
Common stock, shares, issued	3,926,491hrt_Sharesissuedcommonstock	3,926,491hrt_Sharesissuedcommonstock
Common stock, shares, outstanding	2,778,339us-gaap_CommonStockSharesOutstanding	2,722,239us-gaap_CommonStockSharesOutstanding
Treasury stock, shares	1,148,152us-gaap_TreasuryStockShares	1,204,252us-gaap_TreasuryStockShares

Consolidated Statements of Operations (USD $)	12 Months Ended
Consolidated Statements of Operations (USD $)	Dec. 31, 2014	Dec. 31, 2013
Net sales	$ 24,070,292us-gaap_SalesRevenueNet	$ 21,341,052us-gaap_SalesRevenueNet
Cost of sales	19,432,241us-gaap_CostOfGoodsAndServicesSold	18,308,389us-gaap_CostOfGoodsAndServicesSold
Gross profit	4,638,051us-gaap_GrossProfit	3,032,663us-gaap_GrossProfit
Selling and marketing	1,015,279us-gaap_SellingAndMarketingExpense	949,815us-gaap_SellingAndMarketingExpense
General and administrative	2,322,795us-gaap_GeneralAndAdministrativeExpense	2,704,957us-gaap_GeneralAndAdministrativeExpense
Research and development	408,867us-gaap_ResearchAndDevelopmentExpense	335,309us-gaap_ResearchAndDevelopmentExpense
Total operating expenses	3,746,941us-gaap_OperatingExpenses	3,990,081us-gaap_OperatingExpenses
Income (loss) from continuing operations	891,110us-gaap_OperatingIncomeLoss	(957,418)us-gaap_OperatingIncomeLoss
Interest expense	(274,138)us-gaap_InterestExpense	(319,395)us-gaap_InterestExpense
Other income	46,184us-gaap_OtherNonoperatingIncomeExpense	25,646us-gaap_OtherNonoperatingIncomeExpense
Total other income (expense), net	(227,954)us-gaap_OtherIncome	(293,749)us-gaap_OtherIncome
Income (loss) from continuing operations before income taxes	663,156	(1,251,167)
Income tax provision	2,168us-gaap_IncomeTaxExpenseBenefit	2,267,969us-gaap_IncomeTaxExpenseBenefit
Net income (loss) from continuing operations	660,988	(3,519,136)
Discontinued Operations:
Loss from discontinued operations, net of tax of $0 in both 2014 and 2013	(1,779)	(19,194)
Net income (loss)	$ 659,209us-gaap_NetIncomeLoss	$ (3,538,330)us-gaap_NetIncomeLoss
Earnings (loss) per share - basic
Continuing operations	$ 0.24	$ (1.30)
Discontinued operations	$ 0.00	$ (0.01)
Earnings (loss) per share - basic	$ 0.24us-gaap_EarningsPerShareBasic	$ (1.31)us-gaap_EarningsPerShareBasic
Earnings (loss) per share - diluted
Continuing operations	$ 0.23	$ (1.30)
Discontinued operations	$ 0.00	$ (0.01)
Earnings (loss) per share - diluted	$ 0.23us-gaap_EarningsPerShareDiluted	$ (1.31)us-gaap_EarningsPerShareDiluted
Weighted average common shares outstanding - basic	2,742,080	2,705,373
Weighted average common shares outstanding - diluted	2,863,098	2,705,373

Consolidated Statements of Operations Parenthitical (Parentheticals) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Statement of Comprehensive Loss Parenthetical [Abstract]
Tax, discontinued operations	$ 0	$ 0

- Definition

Tax effect allocated to a disposal group that is classified as a component of the entity reported as a separate component of income before extraordinary items. Includes the tax effects of the following: income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal.

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Statement of Changes in Shareholders' Equity (USD $)	Total USD ($)	Common Stock, Shares	Common Stock USD ($)	Additional paid-in capital USD ($)	Treasury Stock, Shares	Treasury stock USD ($)	Accumulated other comprehensive income USD ($)	Retained earnings (accumulated deficit) USD ($)
Stockholders' equity attributable to parent at Dec. 31, 2012	$ 9,696,733us-gaap_StockholdersEquity		$ 39,265	$ 11,110,575		$ (3,335,268)	$ 42,502	$ 1,839,659
Shares at Dec. 31, 2012		3,926,491			1,222,252
Share-based compensation - options	42,611us-gaap_ShareBasedCompensation			42,611
Issuance of common stock from treasury					(18,000)
Issuance of common stock from treasury	62,460					62,460
Issuance of warrants	83,050us-gaap_ProceedsFromIssuanceOfWarrants			83,050
Net Income	(3,538,330)us-gaap_NetIncomeLoss							(3,538,330)
Stockholders' equity attributable to parent at Dec. 31, 2013	6,346,524us-gaap_StockholdersEquity		39,265	11,236,236		(3,272,808)	42,502	(1,698,671)
Shares at Dec. 31, 2013		3,926,491			1,204,252
Share-based compensation - options	33,390us-gaap_ShareBasedCompensation			33,390
Exercise of stock options from treasury	100,692			43,631		57,061
Exercise of stock options from treasury					(26,100)
Exercise of warrants from treasury	105,300hrt_Exerciseofwarrantsfromtreasuryvalue			23,436		81,864
Exercise of warrants from treasury					(30,000)
Net Income	659,209us-gaap_NetIncomeLoss							659,209
Stockholders' equity attributable to parent at Dec. 31, 2014	$ 7,245,115us-gaap_StockholdersEquity		$ 39,265	$ 11,336,693		$ (3,133,883)	$ 42,502	$ (1,039,462)
Shares at Dec. 31, 2014		3,926,491			1,148,152

Consolidated Statements of Cash Flows (USD $)	12 Months Ended
Consolidated Statements of Cash Flows (USD $)	Dec. 31, 2014	Dec. 31, 2013
Cash flows from operating activities:
Net income (loss)	$ 659,209us-gaap_NetIncomeLoss	$ (3,538,330)us-gaap_NetIncomeLoss
Loss from discontinued operations	1,779hrt_Lossfromdiscontinuedoperations	19,194hrt_Lossfromdiscontinuedoperations
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Gain on sale of property, plant and equipment	(21,000)	(4,780)
Amortization of deferred gain on lease	0	(8,934)
Depreciation and amortization	1,538,893	1,444,005
Non-cash interest expense	27,683hrt_Noncashinterestexpense	819hrt_Noncashinterestexpense
Change in allowance for doubtful accounts	5,000	(77,098)
Deferred income taxes	0	2,267,969
Share-based compensation expense	33,390	105,071
Changes in operating assets and liabilities:
Accounts receivable	262,106	(545,034)
Inventories	(178,950)us-gaap_IncreaseDecreaseInInventories	79,813us-gaap_IncreaseDecreaseInInventories
Deposits, prepaid expenses and other assets	(6,385)	256,714
Other non-current assets	(384,762)	29,001
Accounts payable	(298,875)	(281,747)
Accrued expenses and other current liabilities	(294,351)	195,840
Increase (Decrease) in Other Noncurrent Liabilities	438,114	(154,666)
Net cash provided by (used in) operating activities of continuing operations	1,781,851	(212,163)
Net cashprovided by (used in) operating activities of discontinued operations	(1,509)	(277,365)
Net cash provided by (used in) operating activities	1,780,342	(489,528)
Cash flows from investing activities:
Purchases of property, plant and equipment	(1,514,678)	(1,610,152)
Proceeds from sale of property, plant and equipment	24,500	44,337
Cash paid for patents and trademarks	(16,566)hrt_CashPaidForPatentsAndTrademarks	(33,266)hrt_CashPaidForPatentsAndTrademarks
Net cash provided by (used in) investing activities from continuing operations	(1,506,744)	(1,599,081)
Net cash provided by (used in) investing activities from discontinued operations	0	247,992
Net cash provided by (used in) operating activities	(1,506,744)	(1,351,089)
Cash flows from financing activities:
(Payments on) proceeds from revolving line of credit, net	(703,000)	2,774,495
Payments on demand line of credit, net	0hrt_Paymentsondemandlineofcredit	(800,000)hrt_Paymentsondemandlineofcredit
Proceeds from equipment line of credit	116,905hrt_Proceedsfromequipmentlineofcredit	624,094hrt_Proceedsfromequipmentlineofcredit
Proceeds from term notes payable	0hrt_Proceedsfromtermnotespayable	1,500,000hrt_Proceedsfromtermnotespayable
Payments on term notes payable	(435,372)hrt_Paymentsontermnotespayable	(1,515,287)hrt_Paymentsontermnotespayable
Proceeds from subordinated promissory notes	0	500,000
Proceeds from stock options exercises	100,692	0
Proceeds from warrant exercises	105,300us-gaap_ProceedsFromWarrantExercises	0us-gaap_ProceedsFromWarrantExercises
Restricted cash	0us-gaap_DecreaseInRestrictedCash	(1,000,000)us-gaap_DecreaseInRestrictedCash
Net cash provided by (used in) financing activities from continuing operations	(815,475)	2,083,302
Net cash provided by (used in) financing activities from discontinued operations	0	0
Net cash provided by (used in) financing activities	(815,475)	2,083,302
Net increase (decrease) in cash and cash equivalents	(541,877)	242,685
Cash and cash equivalents, beginning of year	751,275us-gaap_Cash	508,590us-gaap_Cash
Cash and cash equivalents, end of year	209,398us-gaap_Cash	751,275us-gaap_Cash
Less: cash and cash equivalents of discontinued operations at end of year	0	1,509
Cash and cash equivalents of continuing operations at end of year	209,398	749,766
Supplemental Cash Flow Information
Cash paid for interest	228,255us-gaap_InterestPaid	301,621us-gaap_InterestPaid
Cash received from tax refunds	132us-gaap_ProceedsFromIncomeTaxRefunds
Non-cash activities:
Acquisition of equipment with equipment notes	0	272,500
Issuance of warrants	0hrt_Issuanceofwarrants	83,050hrt_Issuanceofwarrants
Equipment line of credit converted to term notes payable	740,999	0
Reduction of restricted cash offset by performance guarantee	$ 975,430	$ 0

Note 1 - Description of Business	12 Months Ended
Note 1 - Description of Business	Dec. 31, 2014
Description of Business [Abstract]
Description of Business	Description of Business Arrhythmia Research Technology, Inc., (“ART”), through its wholly-owned subsidiary, Micron Products, Inc. ("Micron", and collectively with ART, the "Company") is a diversified contract manufacturing organization that produces highly-engineered, innovative medical device technologies requiring precision machining and injection molding. The Company also manufactures components, devices and equipment for military, law enforcement, industrial and consumer products applications. The Company's capabilities include molding and silver plating of medical sensors, thermoplastic injection molding, customer-specific quick-turn orthopedic implant component manufacturing and custom products for military and law enforcement applications. The Company competes globally, with nearly half of its revenue derived from exports. ART was founded in 1986 and completed an initial public offering in 1988 and its shares were listed on the American Stock Exchange (now the NYSE MKT) in 1992. Its stock trades under the symbol HRT. The Company has grown organically and through acquisitions. Today, the Company has diversified manufacturing capabilities with the capacity to participate in full product life-cycle activities from early stage development and engineering and prototyping to full scale manufacturing as well as packaging and product fulfillment services. The Company's subsidiary, RMDDxUSA Corp. and its Prince Edward Island subsidiary RMDDx Corporation (collectively "WirelessDx"), discontinued operations in the third quarter of 2012 (see Note 12). Operating matters and liquidity The revolver under the Company's credit facility has a maturity date of June 2015 (see Note 5). At December 31, 2014, the outstanding balance on the revolver was $2,071,495 and is classified as a current liability on the Company's balance sheet. The Company is actively working with the bank on renewing the terms of the revolver and expects the revolver to be renewed prior to the expiration date. Should the Company be unable to renew the revolver, it could have a material adverse effect on operations. The Company believes that cash flows from its operations, together with its existing working capital, the renewed revolver and other resources, will be sufficient to fund operations at current levels and repay debt obligations over the next twelve months and beyond; however, there can be no assurance that the Company will be able to do so.

Note 2 - Accounting Policies

12 Months Ended

Dec. 31, 2014

Accounting Policies [Abstract]

Significant Accounting Policies

Accounting Policies

Principles of consolidation

The consolidated financial statements (the "financial statements") include the accounts of ART, Micron and WirelessDx. WirelessDx is presented herein as discontinued operations. All intercompany balances and transactions have been eliminated in consolidation.

Use of estimates

The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting periods. Actual results could differ from those estimates.

Revenue Recognition

Product revenue is recorded when all criteria for revenue recognition have been satisfied, which is generally when goods are shipped to the Company's customers. Product revenue is recognized in the period when persuasive evidence of an arrangement with a customer exists, the products are shipped and title has transferred to the customer, the price is fixed or determined and collection is probable.

The Company enters into arrangements containing multiple elements which may include a combination of the sale of molds, tooling, engineering and validation services ("tooling") and production units. The Company has determined that certain tooling arrangements, and the related production units, represent one unit of accounting, based on an assessment of the respective standalone value. When the Company determines that an arrangement represents one unit of accounting, the revenue is deferred over the estimated product life-cycle, based upon historical knowledge of the customer, which is generally three years. The Company carries the sales and tooling costs, associated with the related arrangement, as deferred revenue and other current and non-current assets, respectively, on the Company's balance sheet. As the deferred revenue is amortized to sales, the associated prepaid tooling costs are amortized to cost of sales.

The Company cannot effectively predict short-term or long-term production volume in a consistent and meaningful manner due to the nature of these molds and associated products. Therefore, the Company is unable to account for the transactions under the Units of Production method and management has determined the most appropriate amortization method to be the Straight-Line method.

The Company may from time to time, at the customer's request, enter into a bill and hold arrangement. The Company evaluates the nature of the arrangement including, but not limited to (i) the customer's business purpose, (ii) the transfer of risk of ownership to the customer and (iii) the segregation of inventory, along with other elements in accordance with relevant accounting guidance to determine the appropriate method of revenue recognition for each arrangement.

Revenue for software license sales is recognized when licenses are sold as the revenue cycle is completed with no warranty, returns or technical support to customers. Total revenue from software sales was immaterial in relation to consolidated revenues.

Fair value of financial instruments

The carrying amount reported in the balance sheets for cash and cash equivalents, accounts receivable, accounts payable and accrued liabilities approximate their fair value due to the immediate or short-term nature of such instruments. The carrying value of debt approximates fair value since it provides for market terms and interest rates.

Concentration of credit risk

Financial instruments which potentially expose the Company to concentrations of credit risk consist primarily of accounts receivable and cash and cash equivalents. It is the Company’s policy to place its cash in high quality financial institutions. The Company does not believe significant credit risk exists above federally insured limits with respect to these institutions.

Accounts receivable are customer obligations due under normal trade terms. A large portion of the Company's products are sold to large diversified medical, military and law enforcement product manufacturers. The Company does not generally require collateral for its sales; however, the Company believes that its terms of sale provide adequate protection against credit risk.

During the year ended December 31, 2014, the Company had net sales to four customers constituting 15%, 13%, 12% and 10%, respectively, of total 2014 net sales. Accounts receivable from these four customers at December 31, 2014 were 11%, 9%, 15% and 14%, respectively, of the total accounts receivable balance at year end. During the year ended December 31, 2013, the Company had sales to two customers constituting 16% and 15%, respectively, of total 2013 net sales. Accounts receivable from these two customers at December 31, 2013 was 16% and 10%, respectively, of the total accounts receivable balance at year end.

Cash and cash equivalents

Cash and cash equivalents consist of cash on hand and on deposit in high quality financial institutions with maturities of three months or less at the time of purchase.

Restricted cash

Restricted cash consists of cash on deposit at the Bank of Nova Scotia, at December 31, 2013, in lieu of a letter of credit associated with a performance guarantee liability. At December 31, 2014, the balance of restricted cash was zero (see Note 12).

Accounts Receivable and Allowance for Doubtful Accounts

Accounts receivable represent amounts invoiced by the Company. Management maintains an allowance for doubtful accounts based on information obtained regarding individual accounts and historical experience. Amounts deemed uncollectible are written off against the allowance for doubtful accounts. Bad debts have not had a significant impact on the Company’s financial position, results of operations and cash flows.

Inventories

The Company values its inventory at the lower of average cost, first-in-first-out (FIFO) or net realizable value. The Company reviews its inventory for quantities in excess of production requirements, obsolescence and for compliance with internal quality specifications. Any adjustments to inventory would be equal to the difference between the cost of inventory and the estimated net market value based upon assumptions about future demand, market conditions and expected cost to distribute those products to market. The Company records adjustments to account for potential scrap during normal manufacturing operations or potential obsolesce for slow moving inventory.

Property, plant and equipment

Property, plant and equipment are recorded at cost and include expenditures which substantially extend their useful lives. Depreciation on property, plant and equipment is calculated using the straight-line method over the estimated useful lives of the assets. Expenditures for maintenance and repairs are charged to earnings as incurred. When equipment is retired or sold, the resulting gain or loss is reflected in earnings.

Long-lived and intangible assets

The Company performs an assessment for impairment of long-lived assets and intangible assets with finite lives annually or whenever events or changes in circumstances indicate that the carrying value may not be fully recoverable. During 2014, as a result of these reviews, the Company impaired $63,087 of intangible assets, primarily patents pending related to the Ambulatory Physiological Monitoring with Remote Analysis which were no longer patentable. The impairment charge is included as a component of general and administrative expense on the statement of operations and is reflected in the statement of cash flows within depreciation and amortization. In 2013, no impairment charges were recorded. Additionally, in 2014, the Company removed the fully-amortized gross and accumulated amortization balances for the discontinued operations of WirelessDx.

Intangible assets consist of the following:



		December 31, 2014							December 31, 2013
	Estimated Useful Life (in years)	Gross		Accumulated Amortization			Net		Gross		Accumulated Amortization			Net
Patents and trademarks	11	$	414,436	$	(394,371	)	$	20,065	$	476,390	$	(454,566	)	$	21,824
Patents and trademarks pending	—	97,447		—			97,447		143,968					143,968
Trade names	7	33,250		(16,740		)	16,510		33,250		(14,525		)	18,725
Total intangible assets		$	545,133	$	(411,111	)	$	134,022	$	653,608	$	(469,091	)	$	184,517

Amortization expense related to intangible assets, excluding the above noted impairment charge, was $3,974 and $4,840 in 2014 and 2013, respectively. Estimated future annual amortization expense for currently amortizing intangible assets is expected to approximate $4,000.

Income taxes

The Company recognizes deferred tax liabilities and assets for the expected future tax consequences of events that have been included in the financial statements or tax returns. Under this method, deferred tax liabilities and assets are determined based on the difference between the financial statement and tax bases of assets and liabilities using tax rates in effect for the year in which the differences are expected to reverse.

The Company files income tax returns in the U.S. Federal jurisdiction, Canadian jurisdiction and various state jurisdictions. The Company follows accounting guidance regarding the recognition, measurement, presentation and disclosure of uncertain tax positions in the financial statements. Tax positions taken or expected to be taken in the course of preparing the Company’s tax returns are required to be evaluated to determine whether the tax positions are “more-likely-than-not” to be upheld under regulatory review. The resulting tax impacts of these tax positions, if any, are recognized in the financial statements based on the results of this evaluation. The Company did not recognize any tax liabilities associated with uncertain tax positions, nor have they recognized any interest or penalties related to unrecognized tax positions. Generally, the Company is no longer subject to federal and state tax examinations by tax authorities for years before fiscal years ending December 31, 2011.

Share-based compensation

Share-based compensation cost is measured at the grant date, based on the fair value of the award, and is recognized as an expense over the employee’s requisite service period (generally the vesting period of the share-based grant).

Comprehensive income

The Company has accumulated other comprehensive income of $42,502 from changes in currency valuations with our Canadian operations as of December 31, 2014 and 2013. In the years ended December 31, 2014 and 2013, comprehensive income (loss) equaled net income (loss) and there were no changes in accumulated other comprehensive income.

Earnings per share data

Basic earnings (loss) per share is computed by dividing net income (loss) available to common shareholders by the weighted average number of common shares outstanding. The computation of diluted earnings (loss) per share is similar to the computation of basic earnings (loss) per share except that the denominator is increased to include the average number of additional common shares that would have been outstanding if the dilutive potential common shares had been issued. In addition, the numerator is adjusted for any changes in net income (loss) that would result from the assumed conversions of those potential shares.

Research and development

Research and development expenses include costs directly attributable to conducting research and development programs primarily related to the development of a unique process to improve silver coating during the manufacturing processes, including the design and testing of specific process improvements for certain medical device components. Such costs include salaries, payroll taxes, employee benefit costs, materials, supplies, depreciation on research equipment, and services provided by outside contractors. All costs associated with research and development programs are expensed as incurred.

Reclassification of prior period balances

Amounts in prior year financial statements are reclassified when necessary to conform to the current year presentation.

Note 3 - Inventories

12 Months Ended

Dec. 31, 2014

Inventories [Abstract]

Inventories, net

Inventories consist of the following:



December 31,	2014		2013
Raw materials	$	873,306	$	947,765
Work-in-process	370,220		266,431
Finished goods	1,270,715		1,121,095
Total	$	2,514,241	$	2,335,291

The cost of silver in our inventory as raw materials, in work-in-process or as a plated surface on finished goods had an estimated cost of $439,800 and $382,332 in 2014 and 2013, respectively.

- Definition

The entire disclosure for inventory. This may include, but is not limited to, the basis of stating inventory, the method of determining inventory cost, the major classes of inventory, and the nature of the cost elements included in inventory. If inventory is stated above cost, accrued net losses on firm purchase commitments for inventory and losses resulting from valuing inventory at the lower-of-cost-or-market may also be included. For LIFO inventory, may disclose the amount and basis for determining the excess of replacement or current cost over stated LIFO value and the effects of a LIFO quantities liquidation that impacts net income.

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Note 4 - Property, Plant and Equipment, Net

12 Months Ended

Dec. 31, 2014

Property, Plant and Equipment, Net [Abstract]

Property, Plant and Equipment, Net

Property, plant and equipment consist of the following:



December 31,	Asset Lives (in years)			2014			2013
Machinery and equipment	3	to	15	$	14,608,949		$	13,734,528
Building and improvements		20		4,360,114			4,303,156
Vehicles	3	to	5	90,713			94,227
Furniture, fixtures, computers and software	3	to	5	1,349,931			1,317,189
Land				202,492			202,492
Construction in process				568,234			177,473
Total property, plant and equipment				21,180,433			19,829,065
Less: accumulated depreciation				(13,561,532		)	(12,249,509		)
Property, plant and equipment, net				$	7,618,901		$	7,579,556

For the year ended December 31, 2014, the Company recorded $1,471,832 of depreciation expense compared to $1,439,165 for the year ended December 31, 2013. There are no commitments related to the completion of construction in process as of December 31, 2014.

- Definition

The entire disclosure for long-lived, physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, accounting policies and methodology, roll forwards, depreciation, depletion and amortization expense, including composite depreciation, accumulated depreciation, depletion and amortization expense, useful lives and method used, income statement disclosures, assets held for sale and public utility disclosures.

+ References+ Details

Note 5 - Debt

12 Months Ended

Dec. 31, 2014

Debt [Abstract]

Debt

The following tables set forth the items which comprise debt for the Company:



December 31,	2014		2013
Revolving line of credit	$	2,071,495	$	2,774,495
Equipment line of credit	$	—	$	624,094
Subordinated promissory notes	$	445,452	$	417,769

Term notes payable:
Commercial term loan	1,009,977		1,293,378
Equipment term loan	640,734		—
Equipment notes	170,385		222,091
Total term notes payable	$	1,821,096	$	1,515,469

Total Debt	$	4,338,043	$	5,331,827

Bank Debt

In March 2013, the Company entered into a multi-year credit facility with a Massachusetts based bank. The credit facility includes a revolving line of credit (the "revolver") of up to $4.0 million, a commercial term loan of $1.5 million and an equipment line of credit of $1.0 million (a portion of which was converted into an equipment term loan) and is secured by substantially all assets of the Company with the exception of real property.

Revolver

The revolver provides for borrowings up to 80% of eligible accounts receivable and 50% of eligible raw materials inventory. The interest rate on the revolver is calculated at the bank's prime rate plus 0.25% (3.50% at December 31, 2014). The revolver has a maturity date of June 2015. Amounts available to borrow under the revolver are $972,489 at December 31, 2014.

Commercial term loan

The commercial term loan has a five year term with a maturity date of March 2018. The interest rate on the loan is a fixed 4.25% per annum and the loan requires monthly payments of principal and interest of approximately $28,000.

Equipment line of credit and equipment term loan

The Company had an equipment line of credit which allowed for advances of up to $1.0 million and included a one-year draw period during which payments were interest only. The draw period ended March 29, 2014 and the then outstanding balance on the equipment line of credit of $740,999 was converted to a five-year term loan with a maturity date of March 29, 2019. The equipment term loan bears interest at a fixed rate of 4.65% and requires monthly payments of principal and interest of approximately $14,000.

On June 26, 2014, the Company entered into a new equipment line of credit for $1.0 million under the Company's multi-year credit facility. This equipment line of credit is for the purchase of capital equipment. At December 31, 2014, no amounts had been drawn on the equipment line. The term of this equipment line is six years, maturing on June 26, 2020, inclusive of a maximum one year draw period. Repayment shall consist of monthly interest only payments, equal to the bank's prime rate plus 0.25% as to each advance commencing on the date of the loan through the earlier of: (i) one year from the date of the loan or (ii) the date upon which the equipment line of credit is fully advanced (the “Conversion Date”). On the Conversion Date, principal and interest payments will be due and payable monthly in an amount sufficient to pay the loan in full based upon an amortization schedule commensurate with the remaining term of the loan.

Bank covenants

The bank facility contains both financial and non-financial covenants. The financial covenants include maintaining certain debt coverage and leverage ratios. The non-financial covenants relate to various matters including notice prior to executing further borrowings and security interests, mergers or consolidations, acquisitions, guarantees, sales of assets other than in the normal course of business, leasing, changes in ownership and payment of dividends. The Company was in compliance with all bank covenants as of December 31, 2014.

Other debt

Equipment notes

In January 2013, the Company entered into two equipment notes totaling $272,500 with a financing company to acquire production equipment. The notes bear interest at 4.66% and require monthly payments of principal and interest of approximately $2,800 over the term of five years.

Subordinated promissory notes

In December 2013, the Company completed a private offering in which the Company sold an aggregate of $500,000 in subordinated promissory notes. The notes are unsecured and require quarterly interest-only payments at a rate of 10% per annum. On the second anniversary following issuance, the interest rate increases to 12% per annum. The notes mature in December 2016 at which point the outstanding balance is due in full. The subordinated promissory notes may be prepaid by the Company at any time following the first anniversary thereof without penalty. The notes are subordinated to all indebtedness of the Company pursuant to its March 2013 multi-year bank credit facility.

In connection with the subordinated promissory notes, the Company issued warrants to purchase the Company's common stock (see Note 9). In order to account for the subordinated notes payable and warrants, the Company allocated the proceeds between the notes and warrants on a relative fair value basis. As a result, the Company allocated $416,950 to the notes and $83,050 to the warrants. The total discount on the notes is being recognized as non-cash interest expense over the term of the notes. In the years ended December 31, 2014 and 2013 the Company recorded $27,683and $819, respectively, of non-cash interest expense related to the amortization of the discount. The unamortized discount which is net against the outstanding balance of the subordinated promissory notes is $54,548 at December 31, 2014.

Future maturities of debt for the years ending December 31 are as follows:



	2015		2016		2017		2018		2019		Total
Revolver	$	2,071,495	$	—	$	—	$	—	$	—	$	2,071,495
Subordinated promissory notes	—		500,000		—		—		—		$	500,000
Term debt and equipment notes	490,341		512,397		533,443		243,548		41,367		$	1,821,096
Total	$	2,561,836	$	1,012,397	$	533,443	$	243,548	$	41,367	$	4,392,591

- Definition

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

+ References+ Details

Note 6 - Income Taxes

12 Months Ended

Dec. 31, 2014

Income Taxes [Abstract]

Income Taxes

The income tax provision consists of the following:



Years Ended December 31,	2014		2013
Current:
Federal	$	—	$	—
State	2,168		—
Total current income taxes	2,168		—
Deferred:
Federal	—		1,437,269
State	—		830,700
Foreign	—		—
Total deferred income taxes	—		2,267,969
Total income tax provision	$	2,168	$	2,267,969

The components of deferred income taxes are as follows:



December 31,	2014			2013
Deferred income taxes:
Current deferred tax assets:
Inventories	$	188,300		$	111,800
Bad debt reserve	65,200			63,200
Accrued expenses	25,100			104,900
Total current deferred tax assets	278,600			279,900
Long-term deferred tax assets:
Net operating loss carryforwards	2,982,100			2,696,400
Foreign net operating loss carryforwards	291,100			291,100
Federal and state tax credit carryforwards	421,700			431,900
Patents and intangibles	73,000			99,100
Stock compensation	89,700			89,800
Other long term	142,100			474,500
Total long-term deferred tax assets	3,999,700			4,082,800
Total deferred tax assets	4,278,300			4,362,700

Current deferred tax liabilities:
Prepaid expenses	(59,900		)	(50,400		)
Long-term deferred tax liabilities:
Property, plant and equipment	(976,400		)	(934,100		)
Total deferred tax liabilities	(1,036,300		)	(984,500		)
Deferred tax valuation allowance	(3,242,000		)	(3,378,200		)
Net deferred tax assets (liabilities)	$	—		$	—

As of June 30, 2013, the Company had recorded twelve consecutive quarters of pre-tax losses. Additionally, management's projections of future income in the face of challenging market conditions, and the impact of identified tax planning strategies, created uncertainty regarding the Company's ability to realize its deferred tax assets. Management evaluated and weighted all available evidence, both positive and negative, through June 30, 2013, and determined that the weight of negative evidence occurring in the second quarter of 2013 made it difficult to form a supportable conclusion that a full valuation allowance was not needed. Factors such as projected increases in cost of sales, overall sales volumes from key customers and the continued volatility in the silver market all negatively impacted the second quarter re-forecast of pre-tax earnings and the analysis of future taxable income. Consequently, management determined that the Company could not support the realization of its deferred tax assets and identified the second quarter of 2013 as the appropriate period to record a full valuation allowance on its deferred tax assets, resulting in the recognition of a $2,267,969 tax expense in 2013.

In assessing the realizability of deferred tax assets, management considers whether it is more likely than not that some portion or all of the deferred tax assets will not be realized. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income during the periods in which those temporary differences become deductible. Management considers the scheduled reversal of deferred tax liabilities, projected future taxable income, and tax-planning strategies in making this assessment. As of December 31, 2014, the Company continues to maintain a valuation allowance against all of its domestic and foreign deferred tax assets.

For the year ended December 31, 2014, the Company has federal, state and foreign net operating loss carryforwards totaling $7,752,000, $11,517,000 and $1,039,000 respectively, which begin to expire in 2030. The Company also had federal and state tax credit carryovers of $249,000 and $261,000, respectively. The federal and state credits begin to expire in 2026 and 2014, respectively.

The Company files a consolidated federal income tax return. The actual income tax provision differs from applying the Federal statutory income tax rate (34%) to the pre-income tax loss from continuing operations as follows:



Years Ended December 31,	2014			2013
Tax (benefit) provision computed at statutory rate	$	224,867		$	(425,395	)
Increases (reductions) due to:
Change in valuation allowance	(136,268		)	2,907,300
State income taxes, net of federal benefit	23,475			(58,045		)
Permanent differences	14,561			12,660
Tax credits (federal and state)	(6,630		)	(96,133		)
Utilization of deferred taxes previously reserved	(117,837		)	(72,418		)
Income tax provision	$	2,168		$	2,267,969

- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

+ References+ Details

Note 7 - Employee Benefit Plans	12 Months Ended
Note 7 - Employee Benefit Plans	Dec. 31, 2014
7. Employee Benefit Plans [Abstract]
Employee Benefit Plans	Employee Benefit Plans The Company sponsors an Employee Savings and Investment Plan under Section 401(k) of the Internal Revenue Code covering all eligible employees of the Company. Employees can contribute up to 90% of their eligible compensation to the maximum allowable by the IRS. The Company’s matching contributions are at the discretion of the Company. The Company’s matching contributions in 2014 and 2013 were $46,958 and $44,488, respectively.

Note 8 - Commitments and Contingencies	12 Months Ended
Note 8 - Commitments and Contingencies	Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Legal matters In the ordinary course of its business, the Company is involved in various legal proceedings involving a variety of matters. The Company does not believe there are any pending legal proceedings that will have a material impact on the Company’s financial position or results of operations. Operating lease agreements In 2014, the Company entered into two operating leases for office equipment. The leases require future minimum annual lease payments of $7,287, $7,287 and $1,602 for fiscal years 2015, 2016 and 2017, respectively.

Note 9 - Shareholders Equity

12 Months Ended

Dec. 31, 2014

Shareholders equity [Abstract]

Shareholders Equity

Shareholders’ equity

Common stock

In the fourth quarter of 2013 an aggregate of 18,000 shares were issued out of treasury to the three independent members of the Board of Directors of the Company pursuant to the Company's 2010 Equity Incentive Plan. The Company recorded $62,460 of non-cash compensation expense in connection with this share issuance.

During 2014, 56,100 shares were issued out of treasury as a result of the exercise of stock options and warrants (see below).

No dividends were declared or paid in 2014 or 2013.

Warrants

In connection with the subordinated promissory notes issued in December 2013 (see Note 5), the Company issued warrants to purchase 100,000 shares of the Company’s common stock. The warrants are exercisable during the period commencing six months after issuance and for three years from issuance, at an exercise price equal to $3.51 per share, namely, the closing market price of the Company’s common stock on the day prior to the closing date of the offering. The warrants expire in December 2016. During 2014, the Company received proceeds of $105,300 from the exercise of 30,000 warrants.

Stock options and Share-Based Incentive Plan

In March 2010, the Company's Board of Directors adopted the Arrhythmia Research Technology, Inc. 2010 Equity Incentive Plan (the “2010 Plan”). The 2010 Plan authorizes the issuance of an aggregate of 500,000 shares. The Company's 2001 Stock Option Plan (the "2001 Plan"), which expired in 2011, will continue to govern outstanding options but no further options will be granted under the 2001 Plan. The Company now has one plan providing the Company flexibility to award a mix of stock options, equity incentive grants, performance awards and other types of stock-based compensation to certain eligible employees, non-employee directors, or consultants and under which an aggregate of 500,000 shares have been reserved for such grants. The options granted have either six or ten year contractual terms that vest annually over a five-year term.

At December 31, 2014, there were 165,800 total shares outstanding; 35,800 from the 2001 Plan and 130,000 from the 2010 Plan. At December 31, 2014, there were 360,000 shares available for future grants under the 2010 Plan, after giving effect to shares which became available for reissuance due to expired or forfeited options.

The fair value of each stock option award is estimated on the date of grant using the Black-Scholes option pricing model that uses the assumptions noted in the following table. Expected volatilities are based on historical volatility of the Common Stock using historical periods consistent with the expected term of the options. The expected term of options granted under the Company’s equity incentive plan, all of which qualify as “plain vanilla,” is based on the average of the contractual term and the vesting period as permitted under SEC Staff Accounting Bulletin Nos. 107 and 110. The risk-free rate is based on the yield of a U.S. Treasury security with a term consistent with the option.

During 2014 and 2013 there were 7,500 and 52,500 new option grants, respectively. The assumptions used to measure the fair value of option grants in 2014 and 2013 were as follows:



Years Ended December 31,	2014		2013
Expected option term		6.5		6.5
Expected volatility factor		27%	29%	to	31%
Risk-free rate		0.96%	0.36%	to	0.68%
Expected annual dividend yield		—%		—%

The following table sets forth the stock option transactions for the year ended December 31, 2014:



	Number of options		Weighted average exercise price		Weighted average remaining contractual term (in years)	Aggregate intrinsic value
Outstanding at December 31, 2013	256,500		$	5.61	5.3	$	—
Granted	7,500		6.45
Exercised	(26,100	)	3.86			—
Forfeited	(15,600	)	3.66
Expired	(56,500	)	7.15
Outstanding at December 31, 2014	165,800		$	5.58	6.09	$	305,124

Exercisable at December 31, 2014	74,400		$	6.07	4.75	$	119,342
Exercisable at December 31, 2013	120,000		$	6.34	2.5	$	8,850

The total intrinsic value of options exercised during 2014 was $80,880. There were no options exercised during 2013. For the years ended December 31, 2014 and 2013, share-based compensation expense related to stock options and the non-cash issuance of common stock amounted to $33,390 and $105,071, respectively, and is included in general and administrative expenses. As of December 31, 2014 and 2013, there was $86,896 and $133,531 of unrecognized compensation costs, respectively, related to non-vested share-based compensation arrangements granted under the stock option plan. This cost is expected to be recognized over a weighted average period of 3.1 years. The weighted average grant date fair value of options issued in 2014 was $1.91.

Note 10 - Earnings per share (Notes)

12 Months Ended

Dec. 31, 2014

Earnings Per Share [Abstract]

Earnings Per Share [Text Block]

Earnings per share

Basic earnings (loss) per share is computed by dividing net income (loss) available to common shareholders by the weighted average number of common shares outstanding. The computation of diluted earnings (loss) per share is similar to the computation of basic earnings (loss) per share except that the denominator is increased to include the average number of additional common shares that would have been outstanding if the dilutive potential common shares had been issued. In addition, the numerator is adjusted for any changes in net income (loss) that would result from the assumed conversions of those potential shares.

As of December 31, 2014 there were options to purchase 165,800 shares and warrants to purchase 70,000 shares of the Company's common stock outstanding. As of December 31, 2014, 47,500 of the options to purchase, and none of the warrants, were anti-dilutive and therefore not included in the calculation of earnings per share in 2014.

As of December 31, 2013 there were options to purchase 256,500 options outstanding, all of which were anti-dilutive. Therefore, none of these options or warrants were included in the calculation of loss per share in 2013.

The following table shows the calculation of earnings (loss) per share for the years ended December 31, 2014 and 2013:



Years Ended December 31,	2014		2013

Basic EPS:
Net income (loss) available to common shareholders	$	659,209	$	(3,538,330	)
Weighted average common shares outstanding	2,742,080		2,705,373
Income (loss) per share - basic
Continuing operations	$	0.24	$	(1.30	)
Discontinued operations	$	—	$	(0.01	)
Basic EPS	$	0.24	$	(1.31	)

Diluted EPS:
Net income (loss) available to common shareholders	$	659,209	$	(3,538,330	)

Weighted average common shares outstanding, basic	2,742,080		2,705,373
Assumed conversion of net common shares issuable under stock option plans	91,889		—
Assumed conversion of net common shares issuable under warrants	29,129		—
Weighted average common and common equivalent shares outstanding, diluted	2,863,098		2,705,373
Income (loss) per share - diluted
Continuing operations	$	0.23	$	(1.30	)
Discontinued operations	$	—	$	(0.01	)
Diluted EPS	$	0.23	$	(1.31	)

Note 11 - Industry and Geographic Segments

12 Months Ended

Dec. 31, 2014

Industry and Geographic Segments [Abstract]

Industry and Geographic Segments

The Company’s Chief Operating and Decision Maker ("CODM") manages the operations and reviews the results of operations as a single reporting unit. While the Company operates its business as one segment, the Company has diversified manufacturing capabilities as evidenced by its product offerings across several industry categories supporting customers around the globe.

The following table sets forth, for the periods indicated, the consolidated revenue and percentages of revenue from continuing operations derived from the sales of the Company's products and services in certain industries.



	Revenue for the Years Ended December 31,
	2014		%	2013		%
Medical	$	19,714,328	82	$	17,459,309	82
Industrial	1,753,946		7	1,382,913		6
Military and Law Enforcement	1,358,568		6	1,499,428		7
Consumer Products	852,030		3	618,361		3
Other	391,420		2	381,041		2
Total	$	24,070,292	100	$	21,341,052	100

The following table sets forth, for the periods indicated, the consolidated revenue and percentages of revenue from continuing operations derived from the sales of all of the Company's products and services by geographic market.



	Revenue for the Years Ended December 31,
	2014		%	2013		%
United States	$	13,050,717	54	$	11,642,242	55
Asia	5,168,283		21	3,676,854		17
Canada	3,791,229		16	3,625,470		17
Europe	1,344,098		6	1,639,986		8
Other	715,965		3	756,500		3
Total	$	24,070,292	100	$	21,341,052	100

Note 12 - Discontinued Operations

12 Months Ended

Dec. 31, 2014

Discontinued Operations [Abstract]

Discontinued Operations

In September 2012, the Board, on the recommendation of management, authorized the discontinuance of operations and disposition of the assets of WirelessDx. As a result, the operations of WirelessDx are presented as discontinued operations.

There was no revenue from discontinued operations for the years ended December 31, 2014 and 2013, respectively. Net loss from discontinued operations for the years ended December 31, 2014 and 2013 were $1,779 and $19,194, respectively. Activity during the above noted periods consisted primarily of legal and other fees incurred offset by minor reversals.

At December 31, 2013, the Company had a $1.0 million liability for an unmet performance obligation related to the discontinued operations. This performance obligation was secured by $1.0 million of restricted cash. The performance guarantee liability was carried on the balance sheet of continuing operations, as the liability was guaranteed by ART. In May 2014, $975,430 was drawn from the restricted cash, satisfying the guarantee on the performance obligation. The balance of $24,570 was returned to ART and recorded as other income on the consolidated statements of operations.

On May 8, 2014, RMDDxUSA Corp. filed a voluntary petition for relief under Chapter 7 (Liquidation) of the United States Bankruptcy Code in the District of Massachusetts. A trustee was assigned to review the assets and liabilities of the company. The trustee conducted the statutory Meeting of Creditors on June 16, 2014. There has been no further activity in the bankruptcy proceedings. It is anticipated that the trustee overseeing RMDDxUSA Corp’s bankruptcy estate will take the steps necessary to close the bankruptcy case in 2015.

The assets and liabilities of the discontinued operations are listed below:



Years ended December 31,	2014		2013
Cash	$	—	$	1,509
Total current assets from discontinued operations	—		1,509
Total assets from discontinued operations	$	—	$	1,509

Accounts payable and accrued expenses	$	320,056	$	319,787
Total current liabilities from discontinued operations	320,056		319,787
Total liabilities from discontinued operations	$	320,056	$	319,787

- Definition

The entire disclosure for the facts and circumstances leading to the completed or expected disposal, manner and timing of disposal, the gain (loss) recognized in the income statement and the income statement caption that includes that gain (loss), amounts of revenues and pretax profit or loss reported in discontinued operations, the segment in which the disposal group was reported, and the classification (whether sold or classified as held for sale) and carrying value of the assets and liabilities comprising the disposal group. Includes all disposal groups, including those classified as components of the entity (discontinued operations).

+ References

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+ Details

Note 13 - Subsequent Events (Notes)	12 Months Ended
Note 13 - Subsequent Events (Notes)	Dec. 31, 2014
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events Executive Officers Employment Agreements In January 2015, the Company entered into a two year employment agreement with Mr. Salvatore Emma, Jr., pursuant to which Mr. Emma will continue to be employed as the President and Chief Executive Officer of the Company. The term of the agreement commenced as of January 1, 2015 and will continue until December 31, 2016 unless earlier terminated pursuant to the terms of the agreement. In January 2015, the Company entered into a two year employment agreement with Mr. Derek T. Welch pursuant to which Mr. Welch will serve as the Chief Financial Officer of the Company. The term of the agreement commenced as of January 1, 2015 and will continue until December 31, 2016 unless terminated pursuant to the terms of the agreement.

Note 2 - Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2014

Accounting Policies [Abstract]

Principles of consolidation

The consolidated financial statements (the "financial statements") include the accounts of ART, Micron and WirelessDx. WirelessDx is presented herein as discontinued operations. All intercompany balances and transactions have been eliminated in consolidation.

Use of estimates

The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting periods. Actual results could differ from those estimates.

Revenue Recognition

Product revenue is recorded when all criteria for revenue recognition have been satisfied, which is generally when goods are shipped to the Company's customers. Product revenue is recognized in the period when persuasive evidence of an arrangement with a customer exists, the products are shipped and title has transferred to the customer, the price is fixed or determined and collection is probable.

The Company enters into arrangements containing multiple elements which may include a combination of the sale of molds, tooling, engineering and validation services ("tooling") and production units. The Company has determined that certain tooling arrangements, and the related production units, represent one unit of accounting, based on an assessment of the respective standalone value. When the Company determines that an arrangement represents one unit of accounting, the revenue is deferred over the estimated product life-cycle, based upon historical knowledge of the customer, which is generally three years. The Company carries the sales and tooling costs, associated with the related arrangement, as deferred revenue and other current and non-current assets, respectively, on the Company's balance sheet. As the deferred revenue is amortized to sales, the associated prepaid tooling costs are amortized to cost of sales.

The Company cannot effectively predict short-term or long-term production volume in a consistent and meaningful manner due to the nature of these molds and associated products. Therefore, the Company is unable to account for the transactions under the Units of Production method and management has determined the most appropriate amortization method to be the Straight-Line method.

The Company may from time to time, at the customer's request, enter into a bill and hold arrangement. The Company evaluates the nature of the arrangement including, but not limited to (i) the customer's business purpose, (ii) the transfer of risk of ownership to the customer and (iii) the segregation of inventory, along with other elements in accordance with relevant accounting guidance to determine the appropriate method of revenue recognition for each arrangement.

Revenue for software license sales is recognized when licenses are sold as the revenue cycle is completed with no warranty, returns or technical support to customers. Total revenue from software sales was immaterial in relation to consolidated revenues.

Fair value of financial instruments

The carrying amount reported in the balance sheets for cash and cash equivalents, accounts receivable, accounts payable and accrued liabilities approximate their fair value due to the immediate or short-term nature of such instruments. The carrying value of debt approximates fair value since it provides for market terms and interest rates.

Concentration of credit risk

Financial instruments which potentially expose the Company to concentrations of credit risk consist primarily of accounts receivable and cash and cash equivalents. It is the Company’s policy to place its cash in high quality financial institutions. The Company does not believe significant credit risk exists above federally insured limits with respect to these institutions.

Accounts receivable are customer obligations due under normal trade terms. A large portion of the Company's products are sold to large diversified medical, military and law enforcement product manufacturers. The Company does not generally require collateral for its sales; however, the Company believes that its terms of sale provide adequate protection against credit risk.

During the year ended December 31, 2014, the Company had net sales to four customers constituting 15%, 13%, 12% and 10%, respectively, of total 2014 net sales. Accounts receivable from these four customers at December 31, 2014 were 11%, 9%, 15% and 14%, respectively, of the total accounts receivable balance at year end. During the year ended December 31, 2013, the Company had sales to two customers constituting 16% and 15%, respectively, of total 2013 net sales. Accounts receivable from these two customers at December 31, 2013 was 16% and 10%, respectively, of the total accounts receivable balance at year end.

Cash and cash equivalents

Cash and cash equivalents consist of cash on hand and on deposit in high quality financial institutions with maturities of three months or less at the time of purchase.

Restricted cash

Restricted cash consists of cash on deposit at the Bank of Nova Scotia, at December 31, 2013, in lieu of a letter of credit associated with a performance guarantee liability. At December 31, 2014, the balance of restricted cash was zero (see Note 12).

Accounts receivable and Allowance for Doubtful Accounts

Accounts Receivable and Allowance for Doubtful Accounts

Accounts receivable represent amounts invoiced by the Company. Management maintains an allowance for doubtful accounts based on information obtained regarding individual accounts and historical experience. Amounts deemed uncollectible are written off against the allowance for doubtful accounts. Bad debts have not had a significant impact on the Company’s financial position, results of operations and cash flows.

Inventories

The Company values its inventory at the lower of average cost, first-in-first-out (FIFO) or net realizable value. The Company reviews its inventory for quantities in excess of production requirements, obsolescence and for compliance with internal quality specifications. Any adjustments to inventory would be equal to the difference between the cost of inventory and the estimated net market value based upon assumptions about future demand, market conditions and expected cost to distribute those products to market. The Company records adjustments to account for potential scrap during normal manufacturing operations or potential obsolesce for slow moving inventory.

Property, plant and equipment

Property, plant and equipment are recorded at cost and include expenditures which substantially extend their useful lives. Depreciation on property, plant and equipment is calculated using the straight-line method over the estimated useful lives of the assets. Expenditures for maintenance and repairs are charged to earnings as incurred. When equipment is retired or sold, the resulting gain or loss is reflected in earnings.

Long-lived and intangible assets

The Company performs an assessment for impairment of long-lived assets and intangible assets with finite lives annually or whenever events or changes in circumstances indicate that the carrying value may not be fully recoverable. During 2014, as a result of these reviews, the Company impaired $63,087 of intangible assets, primarily patents pending related to the Ambulatory Physiological Monitoring with Remote Analysis which were no longer patentable. The impairment charge is included as a component of general and administrative expense on the statement of operations and is reflected in the statement of cash flows within depreciation and amortization. In 2013, no impairment charges were recorded. Additionally, in 2014, the Company removed the fully-amortized gross and accumulated amortization balances for the discontinued operations of WirelessDx.

Intangible assets consist of the following:



		December 31, 2014							December 31, 2013
	Estimated Useful Life (in years)	Gross		Accumulated Amortization			Net		Gross		Accumulated Amortization			Net
Patents and trademarks	11	$	414,436	$	(394,371	)	$	20,065	$	476,390	$	(454,566	)	$	21,824
Patents and trademarks pending	—	97,447		—			97,447		143,968					143,968
Trade names	7	33,250		(16,740		)	16,510		33,250		(14,525		)	18,725
Total intangible assets		$	545,133	$	(411,111	)	$	134,022	$	653,608	$	(469,091	)	$	184,517

Amortization expense related to intangible assets, excluding the above noted impairment charge, was $3,974 and $4,840 in 2014 and 2013, respectively. Estimated future annual amortization expense for currently amortizing intangible assets is expected to approximate $4,000.

Income taxes

The Company recognizes deferred tax liabilities and assets for the expected future tax consequences of events that have been included in the financial statements or tax returns. Under this method, deferred tax liabilities and assets are determined based on the difference between the financial statement and tax bases of assets and liabilities using tax rates in effect for the year in which the differences are expected to reverse.

The Company files income tax returns in the U.S. Federal jurisdiction, Canadian jurisdiction and various state jurisdictions. The Company follows accounting guidance regarding the recognition, measurement, presentation and disclosure of uncertain tax positions in the financial statements. Tax positions taken or expected to be taken in the course of preparing the Company’s tax returns are required to be evaluated to determine whether the tax positions are “more-likely-than-not” to be upheld under regulatory review. The resulting tax impacts of these tax positions, if any, are recognized in the financial statements based on the results of this evaluation. The Company did not recognize any tax liabilities associated with uncertain tax positions, nor have they recognized any interest or penalties related to unrecognized tax positions. Generally, the Company is no longer subject to federal and state tax examinations by tax authorities for years before fiscal years ending December 31, 2011.

Share-based compensation

Share-based compensation cost is measured at the grant date, based on the fair value of the award, and is recognized as an expense over the employee’s requisite service period (generally the vesting period of the share-based grant).

Comprehensive income (loss)

Comprehensive income

The Company has accumulated other comprehensive income of $42,502 from changes in currency valuations with our Canadian operations as of December 31, 2014 and 2013. In the years ended December 31, 2014 and 2013, comprehensive income (loss) equaled net income (loss) and there were no changes in accumulated other comprehensive income.

Earnings per share data

Basic earnings (loss) per share is computed by dividing net income (loss) available to common shareholders by the weighted average number of common shares outstanding. The computation of diluted earnings (loss) per share is similar to the computation of basic earnings (loss) per share except that the denominator is increased to include the average number of additional common shares that would have been outstanding if the dilutive potential common shares had been issued. In addition, the numerator is adjusted for any changes in net income (loss) that would result from the assumed conversions of those potential shares.

Research and development

Research and development expenses include costs directly attributable to conducting research and development programs primarily related to the development of a unique process to improve silver coating during the manufacturing processes, including the design and testing of specific process improvements for certain medical device components. Such costs include salaries, payroll taxes, employee benefit costs, materials, supplies, depreciation on research equipment, and services provided by outside contractors. All costs associated with research and development programs are expensed as incurred.

Reclassification of prior period balances

Amounts in prior year financial statements are reclassified when necessary to conform to the current year presentation.

Note 2 - Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2014

Accounting Policies [Abstract]

Intangible Assets

Intangible assets consist of the following:



		December 31, 2014							December 31, 2013
	Estimated Useful Life (in years)	Gross		Accumulated Amortization			Net		Gross		Accumulated Amortization			Net
Patents and trademarks	11	$	414,436	$	(394,371	)	$	20,065	$	476,390	$	(454,566	)	$	21,824
Patents and trademarks pending	—	97,447		—			97,447		143,968					143,968
Trade names	7	33,250		(16,740		)	16,510		33,250		(14,525		)	18,725
Total intangible assets		$	545,133	$	(411,111	)	$	134,022	$	653,608	$	(469,091	)	$	184,517

Note 3 - Inventories (Tables)

12 Months Ended

Dec. 31, 2014

Inventory [Abstract]

Inventories, net

Inventories consist of the following:



December 31,	2014		2013
Raw materials	$	873,306	$	947,765
Work-in-process	370,220		266,431
Finished goods	1,270,715		1,121,095
Total	$	2,514,241	$	2,335,291

Note 4 - Property, Plant and Equipment, Net (Tables)

12 Months Ended

Dec. 31, 2014

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment, Net

Property, plant and equipment consist of the following:



December 31,	Asset Lives (in years)			2014			2013
Machinery and equipment	3	to	15	$	14,608,949		$	13,734,528
Building and improvements		20		4,360,114			4,303,156
Vehicles	3	to	5	90,713			94,227
Furniture, fixtures, computers and software	3	to	5	1,349,931			1,317,189
Land				202,492			202,492
Construction in process				568,234			177,473
Total property, plant and equipment				21,180,433			19,829,065
Less: accumulated depreciation				(13,561,532		)	(12,249,509		)
Property, plant and equipment, net				$	7,618,901		$	7,579,556

Note 5 - Debt (Tables)

12 Months Ended

Dec. 31, 2014

Debt [Abstract]

Total Debt

The following tables set forth the items which comprise debt for the Company:



December 31,	2014		2013
Revolving line of credit	$	2,071,495	$	2,774,495
Equipment line of credit	$	—	$	624,094
Subordinated promissory notes	$	445,452	$	417,769

Term notes payable:
Commercial term loan	1,009,977		1,293,378
Equipment term loan	640,734		—
Equipment notes	170,385		222,091
Total term notes payable	$	1,821,096	$	1,515,469

Total Debt	$	4,338,043	$	5,331,827

Future Maturities of Debt

Future maturities of debt for the years ending December 31 are as follows:



	2015		2016		2017		2018		2019		Total
Revolver	$	2,071,495	$	—	$	—	$	—	$	—	$	2,071,495
Subordinated promissory notes	—		500,000		—		—		—		$	500,000
Term debt and equipment notes	490,341		512,397		533,443		243,548		41,367		$	1,821,096
Total	$	2,561,836	$	1,012,397	$	533,443	$	243,548	$	41,367	$	4,392,591

Note 6 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2014

Income Taxes [Abstract]

Income Tax Provision

The income tax provision consists of the following:



Years Ended December 31,	2014		2013
Current:
Federal	$	—	$	—
State	2,168		—
Total current income taxes	2,168		—
Deferred:
Federal	—		1,437,269
State	—		830,700
Foreign	—		—
Total deferred income taxes	—		2,267,969
Total income tax provision	$	2,168	$	2,267,969

Deferred Income Taxes

The components of deferred income taxes are as follows:



December 31,	2014			2013
Deferred income taxes:
Current deferred tax assets:
Inventories	$	188,300		$	111,800
Bad debt reserve	65,200			63,200
Accrued expenses	25,100			104,900
Total current deferred tax assets	278,600			279,900
Long-term deferred tax assets:
Net operating loss carryforwards	2,982,100			2,696,400
Foreign net operating loss carryforwards	291,100			291,100
Federal and state tax credit carryforwards	421,700			431,900
Patents and intangibles	73,000			99,100
Stock compensation	89,700			89,800
Other long term	142,100			474,500
Total long-term deferred tax assets	3,999,700			4,082,800
Total deferred tax assets	4,278,300			4,362,700

Current deferred tax liabilities:
Prepaid expenses	(59,900		)	(50,400		)
Long-term deferred tax liabilities:
Property, plant and equipment	(976,400		)	(934,100		)
Total deferred tax liabilities	(1,036,300		)	(984,500		)
Deferred tax valuation allowance	(3,242,000		)	(3,378,200		)
Net deferred tax assets (liabilities)	$	—		$	—

Federal Income Taxes

The Company files a consolidated federal income tax return. The actual income tax provision differs from applying the Federal statutory income tax rate (34%) to the pre-income tax loss from continuing operations as follows:



Years Ended December 31,	2014			2013
Tax (benefit) provision computed at statutory rate	$	224,867		$	(425,395	)
Increases (reductions) due to:
Change in valuation allowance	(136,268		)	2,907,300
State income taxes, net of federal benefit	23,475			(58,045		)
Permanent differences	14,561			12,660
Tax credits (federal and state)	(6,630		)	(96,133		)
Utilization of deferred taxes previously reserved	(117,837		)	(72,418		)
Income tax provision	$	2,168		$	2,267,969

Note 9 - Shareholders Equity (Tables)

12 Months Ended

Dec. 31, 2014

Stock Options [Abstract]

Fair Value of Option Grants

During 2014 and 2013 there were 7,500 and 52,500 new option grants, respectively. The assumptions used to measure the fair value of option grants in 2014 and 2013 were as follows:



Years Ended December 31,	2014		2013
Expected option term		6.5		6.5
Expected volatility factor		27%	29%	to	31%
Risk-free rate		0.96%	0.36%	to	0.68%
Expected annual dividend yield		—%		—%

Stock Option Transactions

The following table sets forth the stock option transactions for the year ended December 31, 2014:



	Number of options		Weighted average exercise price		Weighted average remaining contractual term (in years)	Aggregate intrinsic value
Outstanding at December 31, 2013	256,500		$	5.61	5.3	$	—
Granted	7,500		6.45
Exercised	(26,100	)	3.86			—
Forfeited	(15,600	)	3.66
Expired	(56,500	)	7.15
Outstanding at December 31, 2014	165,800		$	5.58	6.09	$	305,124

Exercisable at December 31, 2014	74,400		$	6.07	4.75	$	119,342
Exercisable at December 31, 2013	120,000		$	6.34	2.5	$	8,850

Note 10 - Earnings per share (Tables)

12 Months Ended

Dec. 31, 2014

Earnings Per Share [Abstract]

Earnings (loss) per Share, Basic and Diluted

The following table shows the calculation of earnings (loss) per share for the years ended December 31, 2014 and 2013:



Years Ended December 31,	2014		2013

Basic EPS:
Net income (loss) available to common shareholders	$	659,209	$	(3,538,330	)
Weighted average common shares outstanding	2,742,080		2,705,373
Income (loss) per share - basic
Continuing operations	$	0.24	$	(1.30	)
Discontinued operations	$	—	$	(0.01	)
Basic EPS	$	0.24	$	(1.31	)

Diluted EPS:
Net income (loss) available to common shareholders	$	659,209	$	(3,538,330	)

Weighted average common shares outstanding, basic	2,742,080		2,705,373
Assumed conversion of net common shares issuable under stock option plans	91,889		—
Assumed conversion of net common shares issuable under warrants	29,129		—
Weighted average common and common equivalent shares outstanding, diluted	2,863,098		2,705,373
Income (loss) per share - diluted
Continuing operations	$	0.23	$	(1.30	)
Discontinued operations	$	—	$	(0.01	)
Diluted EPS	$	0.23	$	(1.31	)

Note 11 - Industry and Geographic Segments (Tables)

12 Months Ended

Dec. 31, 2014

Industry and Geographic Segments [Abstract]

Sales by Industry Segment

The following table sets forth, for the periods indicated, the consolidated revenue and percentages of revenue from continuing operations derived from the sales of the Company's products and services in certain industries.



	Revenue for the Years Ended December 31,
	2014		%	2013		%
Medical	$	19,714,328	82	$	17,459,309	82
Industrial	1,753,946		7	1,382,913		6
Military and Law Enforcement	1,358,568		6	1,499,428		7
Consumer Products	852,030		3	618,361		3
Other	391,420		2	381,041		2
Total	$	24,070,292	100	$	21,341,052	100

Sales by Geographic Market

The following table sets forth, for the periods indicated, the consolidated revenue and percentages of revenue from continuing operations derived from the sales of all of the Company's products and services by geographic market.



	Revenue for the Years Ended December 31,
	2014		%	2013		%
United States	$	13,050,717	54	$	11,642,242	55
Asia	5,168,283		21	3,676,854		17
Canada	3,791,229		16	3,625,470		17
Europe	1,344,098		6	1,639,986		8
Other	715,965		3	756,500		3
Total	$	24,070,292	100	$	21,341,052	100

Note 12 - Discontinued Operations (Tables)

12 Months Ended

Dec. 31, 2014

Discontinued Operations [Abstract]

Assets and Liabilities of Discontinued Operations

The assets and liabilities of the discontinued operations are listed below:



Years ended December 31,	2014		2013
Cash	$	—	$	1,509
Total current assets from discontinued operations	—		1,509
Total assets from discontinued operations	$	—	$	1,509

Accounts payable and accrued expenses	$	320,056	$	319,787
Total current liabilities from discontinued operations	320,056		319,787
Total liabilities from discontinued operations	$	320,056	$	319,787

- Definition

Tabular disclosure of disposal groups, which may include the gain (loss) recognized in the income statement and the income statement caption that includes that gain (loss), amounts of revenues and pretax profit or loss reported in discontinued operations, the classification and carrying value of the assets and liabilities comprising the disposal group, and the segment in which the disposal group was reported. Also may include the amount of adjustments to amounts previously reported in discontinued operations such as resolution of contingencies arising from the disposal transaction or the operations of the component prior to disposal.

+ References+ Details

Note 1 - Description of Business - Operating Matters and Liquidity (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Operating Matters and Liquidity [Abstract]
Revolving line of credit, outstanding balance, current	$ 2,071,495	$ 0

Note 2 - Accounting Policies - Intangible Assets (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Intangible Assets
Impairment of intangible assets	$ 63,087
Amortization expense	3,974us-gaap_AmortizationOfIntangibleAssets	4,840us-gaap_AmortizationOfIntangibleAssets
Estimated future amortization	4,000hrt_Estimatedfutureamortization
Patents and Trademarks
Intangible Assets
Estimated Useful Life (in years)	11
Gross	414,436	476,390
Accumulated Amortization	(394,371)	(454,566)
Net	20,065	21,824
Patents and Trademarks Pending
Intangible Assets
Estimated Useful Life (in years)	0
Gross	97,447	143,968
Accumulated Amortization	0
Net	97,447	143,968
Trade Names
Intangible Assets
Estimated Useful Life (in years)	7
Gross	33,250	33,250
Accumulated Amortization	(16,740)	(14,525)
Net	16,510	18,725
Total Intangible Assets
Intangible Assets
Gross	545,133	653,608
Accumulated Amortization	(411,111)	(469,091)
Net	$ 134,022	$ 184,517

Note 2 - Accounting Policies (Details) (USD $)	12 Months Ended
Note 2 - Accounting Policies (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Customer revenue as a percent of total revenue
Largest customer	15.00%hrt_LargestCustomerSalesAccountedFor	16.00%hrt_LargestCustomerSalesAccountedFor
Second largest customer	13.00%	15.00%
Third largest customer	12.00%hrt_Thirdlargestcustomerofnetsales
Fourth largest customer	10.00%hrt_Fourthlargestcustomerofnetsales
Customer accounts receivable as a percent of total accounts receivable
Largest customer	11.00%	16.00%
Second largest customer	9.00%	10.00%
Third largest customer	15.00%
Fourth largest customer	14.00%
Comprehensive income
Accumulated comprehensive income from unrealized currency translation	$ 42,502	$ 42,502

Note 3 - Inventories - Inventories, net (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Raw materials	$ 873,306	$ 947,765
Work-in-process	370,220	266,431
Finished goods	1,270,715	1,121,095
Total	2,514,241us-gaap_InventoryGross	2,335,291us-gaap_InventoryGross
Silver inventory	$ 439,800hrt_Silverinventory	$ 382,332hrt_Silverinventory

Note 4 - Property, Plant and Equipment, Net (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment
Machinery and equipment	$ 14,608,949us-gaap_MachineryAndEquipmentGross	$ 13,734,528us-gaap_MachineryAndEquipmentGross
Buildings and improvements	4,360,114us-gaap_BuildingsAndImprovementsGross	4,303,156us-gaap_BuildingsAndImprovementsGross
Vehicles	90,713hrt_VehiclesGross	94,227hrt_VehiclesGross
Furniture, fixtures, computers and software	1,349,931	1,317,189
Land	202,492us-gaap_Land	202,492us-gaap_Land
Construction in progress	568,234us-gaap_ConstructionInProgressGross	177,473us-gaap_ConstructionInProgressGross
Total property, plant and equipment	21,180,433us-gaap_PropertyPlantAndEquipmentGross	19,829,065us-gaap_PropertyPlantAndEquipmentGross
Less: accumulated depreciation	(13,561,532)	(12,249,509)
Property, plant and equipment, net	7,618,901us-gaap_PropertyPlantAndEquipmentNet	7,579,556us-gaap_PropertyPlantAndEquipmentNet
Depreciation expense	$ 1,471,832us-gaap_Depreciation	$ 1,439,165us-gaap_Depreciation
Asset life (years)
Property, Plant and Equipment
Building and improvement	20
Minimum asset life (years)
Property, Plant and Equipment
Machinery and equipment	3
Vehicles	3
Furniture, fixtures, computers and software	3
Maximum asset life (years)
Property, Plant and Equipment
Machinery and equipment	15
Vehicles	5
Furniture, fixtures, computers and software	5

Note 5 - Debt - Total Company Debt (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
TOTAL DEBT
Revolving line of credit	$ 2,071,495	$ 2,774,495
Equipment line of credit	0	624,094
Subordinated promissory notes	445,452	417,769
Term notes payable [Abstract]
Commercial term loan	1,009,977	1,293,378
Equipment term loan	640,734hrt_Equipmenttermloanoutstandingbalance	0hrt_Equipmenttermloanoutstandingbalance
Equipment notes	170,385hrt_Equipmentnotesoutstandingbalance	222,091hrt_Equipmentnotesoutstandingbalance
Term notes payable	1,821,096hrt_Termnotespayable	1,515,469hrt_Termnotespayable
Total debt	$ 4,338,043hrt_Totaldebt	$ 5,331,827hrt_Totaldebt

Note 5 - Debt (Details) (USD $)	12 Months Ended
Note 5 - Debt (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Mar. 29, 2013	Jun. 26, 2014	Mar. 29, 2014	Mar. 31, 2013	Dec. 19, 2013
REVOLVING LINE OF CREDIT
DEBT
Revolving line of credit			$ 4,000,000
Percent borrowable of eligible accounts receivable, revolving line of credit			80.00%
Percent borrowable of eligible raw material inventory, revolving line of credit			50.00%
Revolving line of credit, interest in addition to prime rate			0.25%
Revolving line of credit, interest rate	3.50%
Revolving line of credit, current borrowing capacity	972,489
COMMERCIAL TERM LOAN
DEBT
Commercial term loan			1,500,000
Commercial term loan, interest rate			4.25%
Commercial term loan, approximate monthly payments	28,000
EQUIPMENT LINE OF CREDIT AND EQUIPMENT TERM LOAN
DEBT
Equipment line of credit			1,000,000
Equipment line of credit, balance converted to equipment term loan					740,999
Equipment term loan, interest rate			4.65%
Equipment term loan, approximate monthly payment	14,000
2014 Equipment line of credit				1,000,000
2014 Equipment line of credit, interest in addition to prime rate				0.25%
EQUIPMENT NOTES
DEBT
Equipment notes						272,500
Debt Instrument, Interest Rate, Stated Percentage						4.66%
Equipment notes, approximate monthly payments	2,800
SUBORDINATED PROMISSORY NOTES
DEBT
Subordinated promissory notes							500,000
Subordinated borrowing, Interest rate years 1 and 2							10.00%
Subordinated Borrowing, Interest rate after year 2							12.00%
Fair value of notes payable, subordinated debt							416,950
Fair value of warrants, subordinated debt							83,050
Non cash interest expense, subordinated promissory notes	27,683	819
Unamortized discount, net against outstanding balance of subordinated promissory notes	$ 54,548

Note 5 - Debt - Future Minimum Debt Payments (Details) (USD $)	Dec. 31, 2014
Revolver
Future maturities of debt
2015	$ 2,071,495
2016	0
2017	0
2018	0
2019	0
Total	2,071,495
Subordinated promissory notes
Future maturities of debt
2015	0
2016	500,000
2017	0
2018	0
2019	0
Total	500,000
Term debt and equipment notes
Future maturities of debt
2015	490,341
2016	512,397
2017	533,443
2018	243,548
2019	41,367
Total	1,821,096
Total
Future maturities of debt
2015	2,561,836
2016	1,012,397
2017	533,443
2018	243,548
2019	41,367
Total	$ 4,392,591

Note 6 - Income Taxes - Income Tax Provision (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Current:
Federal	$ 0us-gaap_CurrentFederalTaxExpenseBenefit	$ 0us-gaap_CurrentFederalTaxExpenseBenefit
State	2,168	0
Total current income taxes	2,168us-gaap_CurrentIncomeTaxExpenseBenefit	0us-gaap_CurrentIncomeTaxExpenseBenefit
Deferred:
Federal	0	1,437,269
State	0	830,700
Foreign	0	0
Total deferred income taxes	0us-gaap_DeferredIncomeTaxExpenseBenefit	2,267,969us-gaap_DeferredIncomeTaxExpenseBenefit
Income tax provision	$ 2,168us-gaap_IncomeTaxExpenseBenefit	$ 2,267,969us-gaap_IncomeTaxExpenseBenefit

Note 6 - Income Taxes - Deferred Income Taxes (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Current deferred tax assets:
Inventories	$ 188,300us-gaap_DeferredTaxAssetsInventory	$ 111,800us-gaap_DeferredTaxAssetsInventory
Bad debt reserve	65,200	63,200
Accrued expenses	25,100	104,900
Total current deferred tax assets	278,600	279,900
Long-term deferred tax assets:
Net operating loss carryforwards	2,982,100	2,696,400
Foreign net operating loss carryforwards	291,100	291,100
Federal and state tax credit carryforward	421,700	431,900
Patents and intangibles	73,000	99,100
Stock compensation	89,700	89,800
Other long term	142,100us-gaap_DeferredTaxAssetsOther	474,500us-gaap_DeferredTaxAssetsOther
Total long-term deferred tax assets	3,999,700	4,082,800
Total deferred tax assets	4,278,300us-gaap_DeferredTaxAssetsGross	4,362,700us-gaap_DeferredTaxAssetsGross
Current deferred tax liabilities:
Prepaid expenses	(59,900)	(50,400)
Long-term deferred tax liabilities:
Property, plant and equipment	(976,400)	(934,100)
Total deferred tax liabilities	(1,036,300)us-gaap_DeferredIncomeTaxLiabilities	984,500us-gaap_DeferredIncomeTaxLiabilities
Deferred tax valuation allowance	(3,242,000)	(3,378,200)
Net deferred tax asset (liabilities)	0us-gaap_DeferredTaxAssetsLiabilitiesNet	0us-gaap_DeferredTaxAssetsLiabilitiesNet
Additional tax information
Operating loss carryforward, federal	7,752,000hrt_Operatinglosscarryforwardfederal
Operating loss carryforwards, state	11,517,000hrt_Operatinglosscarryforwardstate
Operating loss carryforwards, foreign	1,039,000hrt_Operatinglosscarryforwardforeign
Federal tax credit carryover	249,000hrt_FederalTaxCreditCarryover
State tax credit carryover	$ 261,000hrt_StateTaxCreditCarryover

Note 6 - Income Taxes - Federal Income Taxes (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Income Taxes [Line Items]
Federal statutory income tax rate	34.00%
Tax (benefit) provision computed at statutory rate	$ 224,867	$ (425,395)
Change in valuation allowance	(136,268)	2,907,300
State income taxes, net of federal benefit	23,475	(58,045)
Permanent differences	14,561hrt_PermanentDifferences	12,660hrt_PermanentDifferences
Tax credits (federal and state)	(6,630)	(96,133)
Utilization of deferred taxes previously recorded	(117,837)	(72,418)
Income tax provision	$ 2,168us-gaap_IncomeTaxExpenseBenefit	$ 2,267,969us-gaap_IncomeTaxExpenseBenefit

Note 7 - Employee Benefit Plans (Details) (USD $)	12 Months Ended
Note 7 - Employee Benefit Plans (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Employee Benefit Plans [Line Items]
Maximum annual contribution per employee, percent of eligible compensation	90.00%
Matching 401K contribution	$ 46,958	$ 44,488

Note 8 - Commitments and Contingencies (Details) (USD $)	Dec. 31, 2014
Operating lease agreements [Abstract]
Operating lease payments due in 2015	$ 7,287
Operating lease payments due in 2016	7,287
Operating lease payments due in 2017	$ 1,602

Note 9 - Shareholders Equity - Fair Value of Option Grants (Details)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Fair Value, Option, Quantitative Disclosures [Line Items]
Expected option term, years	6.5hrt_ExpectedOptionTerm	6.5hrt_ExpectedOptionTerm
Expected volatility factor	27.00%
Risk-free rate	0.96%
Expected annual divided yield	0.00%	0.00%
Minimum
Fair Value, Option, Quantitative Disclosures [Line Items]
Expected volatility factor		29.00%
Risk-free rate		0.36%
Maximum
Fair Value, Option, Quantitative Disclosures [Line Items]
Expected volatility factor		31.00%
Risk-free rate		0.68%

Note 9 - Shareholders Equity - Stock Option Transactions (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Number of shares
Stock Options
Outstanding	165,800	256,500
Granted	7,500
Exercised	(26,100)
Forfeited	(15,600)
Expired	(56,500)
Exercisable, year end	74,400	120,000
Weighted Average Exercise Price
Stock Options
Outstanding	5.58	5.61
Granted	6.45
Exercised	3.86
Forfeited	3.66
Expired	7.15
Exercisable, year end	6.07	6.34
Weighted Average Remaining Contractual Term (Years)
Stock Options
Outstanding	6.09	5.3
Granted
Exercised
Forfeited
Expired
Exercisable, year end	4.75	2.5
Aggregate Intrinsic Value
Stock Options
Outstanding	305,124	0
Granted
Exercised	0
Forfeited
Expired
Exercisable, year end	119,342	8,850

Note 9 - Shareholders Equity (Details) (USD $)	12 Months Ended
Note 9 - Shareholders Equity (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 19, 2013
Common Stock
Fair Value Inputs, Equity, Quantitative Information [Line Items]
Shares Issued to the Board of Directors		18,000
Non-cash compensation expense for shares issued to the Board of Directors		$ 62,460
Treasury stock, shares issued	56,100
Warrants
Fair Value Inputs, Equity, Quantitative Information [Line Items]
Subordinated debt, warrants of common stock issued			100,000
Subordinated debt, exercise price of warrants			$ 3.51
Proceeds from exercised warrants	105,300
Warrants exercised	30,000
Stock options and Share-Based Incentive Plan
Fair Value Inputs, Equity, Quantitative Information [Line Items]
Options Authorized to Issue, 2010 Plan	500,000
Total shares outstanding, share-based incentive plans	165,800
Shares outstanding, 2001 Stock Option Plan	35,800
Shares Outstanding, 2010 Equity Incentive Plan	130,000
Shares Available for Future Grants, 2010 Equity Incentive Plan	360,000
Option grants during period, 2010 Equity Incentive Plan	7,500	52,500
Intrinsic value of options exercised	80,880
Share-based compensation expense	33,390	105,071
Unrecognized compensation costs related to non-vested shares	86,896	$ 133,531
Weighted average period to recognize compensation costs	3.1
Weighted average grant date fair value	1.91

Note 10 - Earnings per share (Details) (USD $)	12 Months Ended
Note 10 - Earnings per share (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Basic EPS:
Net income (loss) available to common shareholders	$ 659,209	$ (3,538,330)
Weighted average common shares outstanding	2,742,080	2,705,373
Continuing operations	$ 0.24	$ (1.30)
Discontinued operations	$ 0.00	$ (0.01)
Basic EPS	$ 0.24us-gaap_EarningsPerShareBasic	$ (1.31)us-gaap_EarningsPerShareBasic
Diluted EPS:
Weighted average common shares outstanding, basic	2,742,080	2,705,373
Assumed conversion of net common shares issuable under stock options	91,889	0
Assumed conversion of net common shares issuable under warrants	29,129	0
Weighted average common and common equivalent shares outstanding, diluted	2,863,098	2,705,373
Continuing operations	$ 0.23	$ (1.30)
Discontinued operations	$ 0.00	$ (0.01)
Diluted EPS	$ 0.23us-gaap_EarningsPerShareDiluted	$ (1.31)us-gaap_EarningsPerShareDiluted

Note 11 - Industry and Geographic Segments - Sales by Industry Segment (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
REVENUE by Industry Segment
Sales by Industry Segment
Medical	$ 19,714,328	$ 17,459,309
Industrial	1,753,946	1,382,913
Military and Law Enforcement	1,358,568	1,499,428
Consumer Product	852,030	618,361
Other	391,420	381,041
Total	$ 24,070,292	$ 21,341,052
PERCENT of Revenue by Industry Segment
Sales by Industry Segment
Medical	82	82
Industrial	7	6
Military and Law Enforcement	6	7
Consumer Products	3	3
Other	2	2
Total	100	100

Note 11 - Industry and Geographic Segments - Sales by Geographic Market (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
REVENUE by Geographic Market
Geographic Market
United States	$ 13,050,717	$ 11,642,242
Asia	5,168,283	3,676,854
Canada	3,791,229	3,625,470
Europe	1,344,098	1,639,986
Other	715,965	756,500
Total	$ 24,070,292	$ 21,341,052
PRECENT of Revenue by Geographic Market
Geographic Market
United States	54	55
Asia	21	17
Canada	16	17
Europe	6	8
Other	3	3
Total Sales	100	100

Note 12 - Discontinued Operations (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Assets and liabilities of discontinued operations
Cash	$ 0	$ 1,509
Total current assets from discontinued operations	0	1,509
Total assets from discontinued operations	0	1,509
Accounts payable and accrued expenses		319,787
Total current liabilities from discontinued operations	320,056	319,787
Total Liabilities from discontinued operations	$ 320,056	$ 319,787

Note 12 - Discontinued Operations - Performance Guarantee Liability (Details) (USD $)	1 Months Ended
	May 31, 2014	Dec. 31, 2013
Discontinued Operations and Disposal Groups [Abstract]
Liability from unmet performance obligations		$ 1,000,000
Restricted cash related to performance obligation		1,000,000
Amount drawn from restricted cash, satisfying guarantee on performance obligation	975,430
Portion of performance guarantee obligation returned to ART	$ 24,570

Note 12 - Discontinued Operations - Net Loss from Discontinued Operations (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Discontinued Operations [Abstract]
Loss from discontinued operations	$ 1,779hrt_Lossfromdiscontinuedoperations	$ 19,194hrt_Lossfromdiscontinuedoperations

hrt-20141231