Investments Marketable Securities Options excluded from the computations of diluted weighted-average shares outstanding Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Net Income (Loss) per Common Share Earnings Per Share, Policy [Policy Text Block] Type of Adoption [Domain] Adjustments for New Accounting Pronouncements [Axis] New Accounting Pronouncements or Change in Accounting Principle [Line Items] Recently Adopted Accounting Pronouncement [Line Items] Accounting Standards Update 2016-01 [Member] Accounting Standards Update No. 2016-01 [Member] New Accounting Pronouncements or Change in Accounting Principle [Table] New Accounting Pronouncements and Changes in Accounting Principles [Text Block] Recently Adopted Accounting Pronouncement Payment of contingent earn-out Reclassification Reclassification Revenue Recognition Revenue Recognition, Policy [Policy Text Block] Maximum [Member] Minimum [Member] Maximum [Member] Minimum [Member] Range [Domain] Range [Axis] Term of Treasury Bills, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Treasury Bills, term Treasury Bills Term Payments Available-for-sale securities Payments Document Type Amendment Flag Document Period End Date Document Fiscal Year Focus Document Fiscal Period Focus Entity Filer Category Entity Registrant Name Entity Central Index Key Current Fiscal Year End Date Entity Well-known Seasoned Issuer Entity Current Reporting Status Entity Voluntary Filers Entity Common Stock, Shares Outstanding Trading Symbol New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification Balance Sheets [Abstract] ASSETS Reclassification of net unrealized losses from accumulated other comprehensive income (AOCI) to retained earnings Number of Years To Recognize Remaining Expense Current assets Cash and cash equivalents Cash and cash equivalents, ending Cash and cash equivalents, beginning Cash equivalents, Carrying amount Cash equivalents, Carrying amount Treasury bills, fair value Treasury bills, fair value Treasury Bills, fair value Inventories Inventories Other current assets Other current assets Income Taxes Receivable, Current Income tax receivable Total current assets Total current assets Intangible assets, net Property and equipment, net Total assets Total assets LIABILITIES AND STOCKHOLDERS' EQUITY Current liabilities Current maturities of contingent earn-out Total current liabilities Total current liabilities Long-term liabilities Contingent earn-out, net of current maturities Liabilities, Noncurrent Total long-term liabilities Commitments and contingencies Stockholders' equity Common stock par value $0.10 per share; authorized 10,000,000 shares; 3,395,521 shares issued and outstanding Common stock par value $0.10 per share; authorized 10,000,000 shares; 3,395,521 shares issued and outstanding Additional Paid in Capital, Common Stock Additional paid-in capital Retained earnings Accumulated other comprehensive gain (unrealized gain on available-for-sale securities, net of income tax) Total stockholders' equity Total stockholders' equity Total liabilities and stockholders' equity Total liabilities and stockholders' equity Trade receivables, allowance for doubtful accounts Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Common stock, par value Common stock, shares authorized Common stock, shares issued Common stock, shares outstanding Selling and marketing General and administrative Research and development expense Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases Change in unrealized value of available-for-sale securities, net of income tax Change in unrealized value of available-for-sale securities, net of income tax Research and development Interest expense Interest expense Interest income Other income Net Income Per Share [Abstract] Basic Weighted Average Number Of Shares Outstanding Basic OrganizationConsolidationAndPresentation Of Financial Statements Disclosure Text Block Weighted average shares Diluted Investments In Debt And Marketable Equity Securities And Certain Trading Assets Disclosure Text Block Weighted Average Number of Shares Outstanding Diluted Weighted average shares Document And Entity Information [Abstract] Document and Entity Information [Abstract] Condensed Consolidated Statements Of Cash Flow [Abstract] Cash flows from (used in) operating activities Depreciation and amortization Deferred income taxes Stock-based compensation expense Other Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation By Liability Class [Domain] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Change in: Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Trade receivables Trade receivables Increase Decrease In Inventories Inventories Accounts payable Accrued expenses Income tax receivable Cash flows from (used in) investing activities Purchases of treasury bills Purchases of treasury bills Proceeds from the maturity of treasury bills Purchase of property and equipment Purchase of property and equipment Net cash from investing activities Net cash from (used in) investing activities Cash flows used in financing activities Payments on long-term debt Payments on long-term debt Net cash from (used in) financing activities Net cash used in financing activities Supplemental cash flow information Cash paid for income taxes Cash paid for interest Nature Of Business And Significant Accounting Policies [Abstract] Basis Of Presentation Investments [Abstract] Investments Fair Value Measurements [Abstract] Fair Value Disclosures [Text Block] Unrecognized Share Based Compensation Fair Value Measurements Stock-Based Compensation [Abstract] Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Stock-Based Compensation Nature of Operations [Text Block] Unrecognized Share Based Compensation Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability Nature Of Business Fair Value of Financial Instruments, Policy [Policy Text Block] Fair Value Measurements Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block] Stock-based Compensation Use of Estimates, Policy [Policy Text Block] Use Of Estimates Schedule of Available-for-sale Securities Reconciliation [Table Text Block] Cost And Estimated Fair Value Of Investments Fair Value Measurements on a Recurring Basis Stock-Based Compensation (Valuation Assumption) [Abstract] Change in contingent earn-out fair value Schedule of Available-for-sale Securities [Table] Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings Investment Type [Axis] Investment Type Categorization [Member] Investments [Domain] Major Types of Debt and Equity Securities [Axis] Major Types Of Debt And Equity Securities [Domain] Major Types of Debt and Equity Securities [Domain] Commercial Paper [Member] Commercial Paper [Member] U S Treasury Securities [Member] Treasury Bills [Member] Equity Securities [Member] Equity Securities [Member] Debt and Equity Securities [Member] Debt And Equity Securities [Member] Debt and Equity Securities [Member] Schedule of Available-for-sale Securities [Line Items] Available-for-sale Securities, Amortized Cost Basis Cost Available-for-sale Securities, Gross Unrealized Gains Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, by Asset Class [Domain] Gross unrealized gain Available-for-sale Securities, Gross Unrealized Losses Gross unrealized loss Fair value, investments Investments, Fair Value Cash and Cash Equivalents, Fair Value Disclosure Cash equivalents, Fair value Cash equivalents, Fair Value Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Schedule of assumptions made in estimating the fair value of the options on the grant date based upon the BSM option-pricing model Dividend Yield Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Table] Fair Value by Asset Class [Axis] Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation By Asset Class [Domain] Limited Marketable Company [Member] Limited Marketable Company [Member] Limited Marketable Company [Member] Fair Value, Hierarchy [Axis] Fair Value Measurements Fair Value Hierarchy [Domain] Fair Value, Measurements, Fair Value Hierarchy [Domain] Fair Value Inputs Level1 [Member] Fair Value, Inputs, Level 1 [Member] Fair Value Inputs Level2 [Member] Fair Value, Inputs, Level 2 [Member] Fair Value Inputs Level3 [Member] Fair Value, Inputs, Level 3 [Member] Liability Class [Axis] Fair Value by Liability Class [Domain] Obligations [Member] Obligations [Member] Investments, Carrying amount Carrying Amount Of Available For Sale Securities Carrying Amount Of Available For Sale Securities Contingent Earn-out, Fair Value Expected Life Statement [Table] Title of Individual [Axis] Title Of Individual With Relationship To Entity [Domain] Relationship to Entity [Domain] Chief Executive Officer [Member] Chief Executive Officer [Member] Statement [Line Items] Granted, Number of Shares Stock Option Vesting Period Vesting Percentage Options expiration from date of grant Number Of Years To Recognize Remaing Share Based Compensation Number Of Years To Recognize Remaing Share Based Compensation Number of Years To Recognize Remaining Expense Beginning Balance Ending Balance Expected Volatility Accrued income tax Net income (loss) Net income (loss) Net comprehensive income Net comprehensive income (loss) Statements Of Comprehensive Income (Loss) [Abstract] Operating Income Operating income (loss) Total operating expenses Total operating expenses Accounts Receivable, Net, Current Trade receivables, less allowance for doubtful accounts of $11 Operating expenses Gross profit Gross profit Cost of goods sold Net sales Non-operating income Non-operating income (expense): Total non-operating income Total Non-operating Income Payment of contingent earn-out Provision for (benefit from) income taxes Accumulated Other Comprehensive Income (Loss) Other comprehensive income Other Comprehensive Income (Loss) Other comprehensive income Net income per share Basic Net income (loss) per share Net income per share Diluted Net income (loss) per share Net cash from (used in) operating activities Net Cash From (Used in) Operating Activities Net increase (decrease) in cash and cash equivalents Net decrease in cash and cash equivalents Contingent earn-out Business Combination, Contingent Consideration, Liability, Current Business Combination, Contingent Consideration, Liability, Noncurrent Contingent earn-out, net of current maturities Cash flows from (used in) operating activities Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract] Net Cash Provided by (Used in) Operating Activities, Continuing Operations Net cash from (used in) operating activities Cash flows from investing activities Net Cash Provided by (Used in) Investing Activities, Continuing Operations [Abstract] Risk Free Interest Rate Net Cash Provided by (Used in) Investing Activities, Continuing Operations Net cash from investing activities Income before income taxes Income (loss) before income tax expense (benefit) Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract] Cash flows used in financing activities Adjustments to reconcile net income to net cash from (used in) operating activities: Net Cash Provided by (Used in) Financing Activities, Continuing Operations Net cash used in financing activities Depreciation, Depletion and Amortization Depreciation and amortization Payments to Acquire Available-for-sale Securities, Debt Purchases of treasury bills Proceeds from Maturities, Prepayments and Calls of Available-for-sale Securities Proceeds from the maturity of treasury bills Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax Gross unrealized gain Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax Gross unrealized loss Available for Sale Securities Debt Securities Fair Value Disclosure Treasury Bills, fair value Adjustments to reconcile net income (loss) to net cash from (used in) operating activities: Change in Fair Value Fair value portion of investments in debt securities classified as available-for-sale. Business Combination, Contingent Consideration, Liability Contingent Earn-out, Carrying Value Available-for-sale Securities, Debt Securities, Current Treasury bills Treasury Bills, carrying value Deferred income tax asset, net Deferred income tax asset, long term Accounts payable current Accounts payable Summary of change in level 3 liabilities at fair value on a recurring basis Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Accrued expenses current Accrued expenses Increase (decrease) other current assets Other current assets Cash And Cash Equivalents [Member] Less Cash Equivalents [Member] Financial Instrument [Axis] Financial Instruments [Domain] Nonfinancial Liabilities Fair Value Disclosure Contingent Earn-out, Fair Value Revenue from Contract with Customer, Including Assessed Tax Cost of Goods and Services Sold Net sales Cost of goods sold Entity Small Business Entity Emerging Growth Company Leases [Abstract] Leases of Lessee Disclosure [Text Block] Commitments Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] Schedule of minimum lease payments required under non-cancelable operating leases Operating Leases, Future Minimum Payments, Remainder of Fiscal Year Operating Leases, Future Minimum Payments, Due in Two Years Operating Leases, Future Minimum Payments, Due in Three Years Operating Leases, Future Minimum Payments, Due in Four Years Operating Leases, Future Minimum Payments, Due in Five Years Operating Leases, Future Minimum Payments, Due Thereafter Operating Leases, Future Minimum Payments Due Operating Leases, Rent Expense 2018 2019 2020 2021 2022 Thereafter Total minimum lease payments Rental expense Subsequent Events [Abstract] Subsequent Events [Text Block] Subsequent Events Subsequent Event [Table] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event [Member] Subsequent event [Member] Vice-President of sales [Member] Vice President [Member] Subsequent Event [Line Items] Stock options issued Vesting [Axis] Vesting [Domain] Share-based Compensation Award, Tranche One [Member] Share-based Compensation Award, Tranche Two [Member] On the grant date [Member] First four anniversaries of the grant date [Member] Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage Options vesting percentage Options expiration term Interest accrued on treasury bills Interest accrued on treasury bills Cash flows from (used in) operating activities Cash flows from investing activities Cash flows used in financing activities