Statement of Financial Position [Abstract] Cash and cash equivalents Cash and cash equivalents at beginning of period Cash and cash equivalents at end of period Trade accounts receivable, net of allowance for doubtful accounts of $146 and $146, respectively Allowance for doubtful accounts, respectively (in Dollars) Inventories Deferred tax assets Prepaid expenses and other current assets Total current assets Machinery and equipment Leasehold improvements Gross property and equipment Less: accumulated depreciation Net property and equipment Long-lived assets Deferred tax assets Goodwill Intangible assets, net Net Carrying Amount Restricted certificates of deposit Other assets Total assets Identifiable assets Accounts payable Accrued wages and benefits Accrued rent Accrued professional fees Accrued sales commissions Domestic and foreign income taxes payable Other current liabilities Total current liabilities Commitments and Contingencies Preferred stock, $0.01 par value; 5,000,000 shares authorized; no shares issued or outstanding Preferred stock par value (in Dollars per share) Preferred stock, shares authorized Preferred stock, shares issued Preferred stock, shares outstanding Common stock, $0.01 par value; 20,000,000 shares authorized; 10,595,755 and 10,595,755 shares issued, respectively Common stock, par value (in Dollars per share) Common stock, shares authorized Common stock, shares issued Balance, January 1, 2015 (in Shares) Balance, June 30, 2015 (in Shares) Addtional paid-in capital Retained earnings Accumulated other comprehensive earnings Treasury stock, at cost; 33,077 and 33,077 shares, respectively Treasury stock, at cost, shares, respectively Total stockholders' equity Balance, January 1, 2015 Balance, June 30, 2015 Total liabilities and stockholders' equity Income Statement [Abstract] Net revenues Net revenues Net revenues Cost of revenues Gross margin Selling expense Engineering and product development expense General and administrative expense Total operating expenses Operating income Other income Earnings before income tax expense Earnings (loss) before income tax expense (benefit) Income tax expense Net earnings Net earnings Net earnings Net earnings Net earnings (loss) Net earnings per common share - basic (in Dollars per share) Weighted average common shares outstanding - basic (in Shares) Weighted average common shares outstanding - basic Net earnings per common share - diluted (in Dollars per share) Weighted average common shares and common share equivalents outstanding - diluted (in Shares) Weighted average common shares and common share equivalents outstanding - diluted Statement of Comprehensive Income [Abstract] Foreign currency translation adjustments Other comprehensive loss Comprehensive earnings Statement of Stockholders' Equity [Abstract] Amortization of deferred compensation related to restricted stock Equity Components [Axis] Common Stock [Member] Additional Paid-in Capital [Member] Retained Earnings [Member] AOCI Attributable to Parent [Member] Treasury Stock [Member] Statement of Cash Flows [Abstract] Depreciation and amortization Provision for excess and obsolete inventory Inventory Write-down Foreign exchange loss Amortization of deferred compensation related to restricted stock Loss on sale of property and equipment Proceeds from sale of demonstration equipment, net of gain Deferred income tax expense Trade accounts receivable Inventories Prepaid expenses and other current assets Other assets Accounts payable Accrued wages and benefits Accrued rent Accrued professional fees Accrued sales commissions Domestic and foreign income taxes payable Other current liabilities Net cash provided by operating activities Purchase of property and equipment Proceeds from sale of property and equipment Net cash used in investing activities Effects of exchange rates on cash Net cash provided by all activities Domestic and foreign income taxes Issuance of unvested shares of restricted stock Forfeiture of unvested shares of restricted stock Disclosure Text Block [Abstract] Accounting Policies [Abstract] Weighted Average Common Shares [Abstract] Unvested shares of restricted stock Average number of potentially dilutive securities excluded from calculation Goodwill and Intangible Assets Disclosure [Abstract] Intangible Assets [Abstract] Finite-Lived Intangible Assets by Major Class [Axis] Customer Relationships [Member] Gross Carrying Amount Accumulated Amortization Accumulated Amortization Net Carrying Amount Patented Technology [Member] Computer Software, Intangible Asset [Member] Trade Names [Member] Order or Production Backlog [Member] Noncompete Agreements [Member] Indefinite-lived Intangible Assets [Axis] Trademarks [Member] Gross Carrying Amount Net Carrying Amount Gross Carrying Amount Future Amortization Expense [Abstract] 2015 (remainder) 2016 2017 2018 2019 Risks and Uncertainties [Abstract] Inventory Disclosure [Abstract] Inventories [Abstract] Raw materials Work in process Inventory consigned to others Finished goods Debt Disclosure [Abstract] Outstanding Letters of Credit [Abstract] Credit Facility [Axis] Letter of Credit [Member] Debt Instrument [Axis] Mt. Laurel [Member] Original L/C Issue Date L/C Expiration Date Lease Expiration Date Letters of Credit Amount Outstanding Mansfield [Member] Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Allocation of Share-Based Compensation Expense [Abstract] Income Statement Location [Axis] Cost of Sales [Member] Allocated Share-Based Compensation Expense Selling and Marketing Expense [Member] Research and Development Expense [Member] General and Administrative Expense [Member] Award Type [Axis] Restricted Stock [Member] Nonvested Shares [Abstract] Unvested shares outstanding, January 1, 2015 Unvested shares outstanding, June 30, 2015 Unvested shares outstanding, January 1, 2015 Unvested shares outstanding, June 30, 2015 Vested Vested Compensation and Retirement Disclosure [Abstract] Segment Reporting [Abstract] Segment Information [Abstract] Segments [Axis] Thermal Products [Member] Mechanical Products [Member] Electrical Products [Member] Corporate Segment [Member] Information by Financial Statement Line Item [Axis] Asset [Member] Identifiable Assets [Abstract] Net Revenue from Unaffiliated Customers [Abstract] Geographical [Axis] UNITED STATES Foreign [Member] Long-lived Assets by Geographical Area [Abstract] ASSETS Current assets: Property and equipment: LIABILITIES AND STOCKHOLDERS' EQUITY Current liabilities: Stockholders' equity: Operating expenses: CASH FLOWS FROM OPERATING ACTIVITIES Adjustments to reconcile net earnings to net cash provided by operating activities: Changes in assets and liabilities: CASH FLOWS FROM INVESTING ACTIVITIES Cash payments for: SUPPLEMENTAL DISCLOSURE OF NON-CASH INVESTING AND FINANCING ACTIVITIES: Nature of Operations [Text Block] Significant Accounting Policies [Text Block] Schedule of Weighted Average Number of Shares [Table Text Block] Potentially dilutive securities: Goodwill and Intangible Assets Disclosure [Text Block] Schedule of Intangible Assets [Table Text Block] Finite-lived intangible assets: Indefinite-lived intangible assets: Finite-lived intangible assets: Indefinite-lived intangible assets: Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Concentration Risk Disclosure [Text Block] Inventory Disclosure [Text Block] Schedule of Inventory, Current [Table Text Block] Debt Disclosure [Text Block] Schedule Of Outstanding Letters Of Credit [Table Text Block] Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block] Schedule of Nonvested Share Activity [Table Text Block] Pension and Other Postretirement Benefits Disclosure [Text Block] Segment Reporting Disclosure [Text Block] Schedule of Segment Reporting Information, by Segment [Table Text Block] Net revenues: Earnings (loss) before income tax expense (benefit): Net earnings (loss): Identifiable assets: Revenue from External Customers by Geographic Areas [Table Text Block] Net revenues: Long-lived Assets by Geographic Areas [Table Text Block] Property and equipment: Thermal Products and Mechanical Products [Member] Concentration Risk Benchmark [Axis] Sales Revenue, Net [Member] Concentration Risk Type [Axis] Customer Concentration Risk [Member] Customer [Axis] Hakuto Co., Ltd. [Member] Texas Instruments Incorporated [Member] Number of Reportable Segments Equipment Leased to Customers, Initial Term Goodwill, Period Increase (Decrease) Amortization of Intangible Assets Concentration Risk, Percentage Number of Operating Segments Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in Shares) Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Employee Service Share-based Compensation, Allocation of Recognized Period Costs, Capitalized Amount Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay Defined Contribution Plan, Maximum Annual Employer Matching Contribution per Emplyee, Amount Defined Contribution Plan Employer Matching Contribution Vesting Period Defined Contribution Plan, Employer Discretionary Contribution Amount Basis of Presentation and Use of Estimates [Policy Text Block] Reclassification, Policy [Policy Text Block] Inventory, Policy [Policy Text Block] Goodwill Intangible and Long Lived Assets [Policy Text Block] Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block] Subsequent Events, Policy [Policy Text Block] Revenue Recognition, Policy [Policy Text Block] Standard Product Warranty, Policy [Policy Text Block] Income Tax, Policy [Policy Text Block] Earnings Per Share, Policy [Policy Text Block] New Accounting Pronouncements, Policy [Policy Text Block] Equity Component [Domain] Financial Statement Line Items with Differences in Reported Amount and Reporting Currency Denominated Amounts [Domain] Note 9 - Segment Information (Tables) [Table] Note 9 - Segment Information (Tables) [Line Items] Finite-Lived Intangible Assets, Major Class Name [Domain] Indefinite-lived Intangible Assets, Major Class Name [Domain] Note 3 - Goodwill and Intangible Assets (Details) - Intangible Assets [Table] Note 3 - Goodwill and Intangible Assets (Details) - Intangible Assets [Line Items] Debt Instrument, Name [Domain] Credit Facility [Domain] Note 6 - Debt (Details) - Outstanding Letters of Credit [Table] Note 6 - Debt (Details) - Outstanding Letters of Credit [Line Items] Equity Award [Domain] Income Statement Location [Domain] Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table] Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] Note 7 - Stock-based Compensation (Details) - Nonvested Shares [Table] Note 7 - Stock-based Compensation (Details) - Nonvested Shares [Line Items] Segments [Domain] Schedule of Segment Reporting Information, by Segment [Table] Segment Reporting Information [Line Items] Geographical [Domain] Note 9 - Segment Information (Details) - Net Revenue from Unaffiliated Customers [Table] Note 9 - Segment Information (Details) - Net Revenue from Unaffiliated Customers [Line Items] Note 9 - Segment Information (Details) - Long-lived Assets by Geographical Area [Table] Note 9 - Segment Information (Details) - Long-lived Assets by Geographical Area [Line Items] Note 2 - Summary of Significant Accounting Policies (Details) [Table] Note 2 - Summary of Significant Accounting Policies (Details) [Line Items] Concentration Risk Benchmark [Domain] Concentration Risk Type [Domain] Customer [Domain] Note 4 - Major Customers (Details) [Table] Note 4 - Major Customers (Details) [Line Items] Note 7 - Stock-based Compensation (Details) [Table] Note 7 - Stock-based Compensation (Details) [Line Items] The entire disclosure for the basis of presentation and the use of estimates in the preparation of financial statements in conformity with generally accepted accounting principles. Vesting period for employer matching contributions to defined contribution plan. Maximum dollar amount of employer's annual matching contribution to a defined contribution plan. With regard to certain equipment of the Company that is lease to customers under non-cancellable operating leases, represents the initial term that such leases generally have. The cash inflow from sale of machinery and equipment net of any gain on sale. Tabular disclosure of intangible assets. Tabular disclosure of letters of credit outstanding as of the reporting date. Asset [Member] Represents assets allocated to segments. Electrical Products [Member] Reportable segment of the company. Foreign [Member] Represents all other countries outside the country of domicile. Hakuto Co Ltd [Member] Major customer to the company. Mansfield [Member] Credit facility agreement. Mechanical Products [Member] Reportable segment of the company. Mt Laurel [Member] Credit facility agreement. Texas Instruments Incorporated [Member] Major customer of the company. Thermal Products And Mechanical Products [Member] Represents information pertaining to both the Thermal Products and Mechanical Products segments. Thermal Products [Member] Reportable segment of the company. Document and Entity Information [Abstract] FiniteLivedIntangibleAssetsAbstract0 PropertyAndEquipmentAbstract0 NetRevenuesAbstract0 IndefiniteLivedIntangibleAssetsAbstract0 Increase (Decrease) in Prepaid Expense and Other Assets Entity Public Float Document Period End Date Increase (Decrease) in Inventories Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Trading Symbol Operating Income (Loss) Foreign Currency Transaction Gain (Loss), before Tax Increase (Decrease) in Other Accrued Liabilities Deferred Tax Assets, Net, Current Property, Plant and Equipment, Gross Document Fiscal Period Focus Entity Current Reporting Status Document Type Intangible Assets, Gross (Excluding Goodwill) Increase (Decrease) in Employee Related Liabilities Document Fiscal Year Focus Payments to Acquire Property, Plant, and Equipment Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Treasury Stock, Value Increase (Decrease) in Accounts Payable Current Fiscal Year End Date Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Net Cash Provided by (Used in) Investing Activities, Continuing Operations Increase (Decrease) in Income Taxes Payable Finite-Lived Intangible Assets, Net Entity Central Index Key Amendment Flag Operating Expenses Entity Registrant Name Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest Increase (Decrease) in Accounts Receivable Liabilities and Equity Assets, Current Cash and Cash Equivalents, Period Increase (Decrease) Liabilities, Current Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Amortization of Other Deferred Charges Entity Common Stock, Shares Outstanding Increase (Decrease) in Other Current Liabilities Net Cash Provided by (Used in) Operating Activities, Continuing Operations Stockholders' Equity Attributable to Parent Gross Profit Entity Voluntary Filers Entity Filer Category Increase (Decrease) in Other Operating Assets and Liabilities, Net Increase (Decrease) in Other Operating Liabilities Depreciation, Depletion and Amortization Entity Well-known Seasoned Issuer Comprehensive Income (Loss), Net of Tax, Attributable to Parent Gain (Loss) on Disposition of Property Plant Equipment Stock Issued During Period, Value, Restricted Stock Award, Forfeitures Increase (Decrease) in Reserve for Commissions, Expense and Taxes Amendment Description Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Statement [Table] Statement [Line Items] Scenario [Axis]