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Valuation Allowances and Reserves [Domain] Medical [Member] Medical member. 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Healthcare Products "MCHP" [Member] M.c. healthcare products "mchp" [member] Effect of exchange rates on cash span_PercentageOfGoodwillDeductibleUnderCanadianTaxLaw Percentage of Goodwill Deductible Under Canadian Tax Law Percentage of goodwill to be deductible under Canadian tax law. us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease (Decrease) Increase in cash and cash equivalents Patents and Trademarks [Member] Patents and trademarks [member] us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount Business Acquisition, Goodwill, Expected Tax Deductible Amount us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice Weighted Average Ex. Price Per Share, Exercisable (in dollars per share) Weighted Average Ex. 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Depreciation and Amortization, Operating Schedule of Accrued Liabilities [Table Text Block] Fair Value Hierarchy [Domain] New Customer [Member] Represents new customer. 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Alternatively, disclosure of the required information may be within the footnotes to the financial statements or a supplemental schedule to the financial statements. us-gaap_AccruedPayrollTaxesCurrent Payroll taxes accrued and withheld Diluted (in dollars per share) us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding Adjusted weighted average shares and assumed conversions (in shares) Diluted (in shares) Accrued and sundry liabilities - Note 8 us-gaap_EmployeeRelatedLiabilitiesCurrent Salaries and other compensation Income before income taxes Income before income taxes Provision for income taxes - Note 13 Income tax expense Accounts payable FINANCING ACTIVITIES: us-gaap_AccrualForTaxesOtherThanIncomeTaxesCurrent Property taxes us-gaap_PaymentsForProceedsFromOtherInvestingActivities Payments for other assets us-gaap_AccruedIncomeTaxesCurrent Federal and state income taxes and sales taxes Robert B. Johnston [Member] Former director. us-gaap_WeightedAverageNumberOfSharesOutstandingBasic Basic (in shares) us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 Debt Instrument, Basis Spread on Variable Rate Basic (in dollars per share) span_PercentageOfRepurchasedCommonStockSharesToTotalOutstandingShares Percentage of Repurchased Common Stock Shares to Total Outstanding Shares The percentage of repurchased common stock shares to total outstanding shares. The Jerry Zucker Revocable Trust [Member] An affiliate of former director Robert B. Johnston. Revenue Recognition, Policy [Policy Text Block] Receivables, Policy [Policy Text Block] Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Class of Stock [Axis] Significant Accounting Policies [Text Block] Accounting Policies [Abstract] Cash and Cash Equivalents, Policy [Policy Text Block] span_StockRepurchasedPricePerShare Stock Repurchased Price per Share The average per share price paid for repurchasing the common stock. 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Distributor 3[Member] Represents customer three who distributes certain of the company's consumer products. us-gaap_AssetsNet Net Assets us-gaap_DeferredTaxLiabilitiesNoncurrent Deferred income taxes - Note 13 Share Repurchase Program [Member] Represents entity's share repurchase program authorized by the Board. Debt Disclosure [Text Block] Fair Value, Assets Measured on Recurring and Nonrecurring Basis [Table Text Block] Former Owner of M.C. Healthcare [Member] Represents such related party as the former owner of M.C. Healthcare. 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State income taxes, net of federal tax benefit Computed tax at the U.S. statutory rate Common Stock [Member] Increases (decreases): Additional Paid-in Capital [Member] us-gaap_PolicyTextBlockAbstract Accounting Policies us-gaap_IncomeTaxReconciliationDeductionsQualifiedProductionActivities Domestic production deduction Retained Earnings [Member] Officer's life insurance