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Note 7 - Income Taxes (Details) (USD $)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Note 7 - Income Taxes (Details) [Line Items]    
Deferred Tax Assets, Tax Credit Carryforwards $ 2,269,000us-gaap_DeferredTaxAssetsTaxCreditCarryforwards $ 1,762,000us-gaap_DeferredTaxAssetsTaxCreditCarryforwards
Deferred Tax Assets, Gross 10,123,000us-gaap_DeferredTaxAssetsGross 9,404,000us-gaap_DeferredTaxAssetsGross
Deferred Tax Assets, Valuation Allowance 10,123,000us-gaap_DeferredTaxAssetsValuationAllowance 9,404,000us-gaap_DeferredTaxAssetsValuationAllowance
Operating Loss Carryforwards 20,112,000us-gaap_OperatingLossCarryforwards 18,647,000us-gaap_OperatingLossCarryforwards
Unrecognized Tax Benefits 212,000us-gaap_UnrecognizedTaxBenefits 185,000us-gaap_UnrecognizedTaxBenefits
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued 52,000us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued 39,000us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued
Unrecognized Tax Benefits, Interest on Income Taxes Expense 10,000us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpense 8,000us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpense
Unrecognized Tax Benefits, Income Tax Penalties Expense 3,000us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesExpense 2,000us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesExpense
Prior to Their Acquisition by the Company [Member]    
Note 7 - Income Taxes (Details) [Line Items]    
Operating Loss Carryforwards $ 11,300,000us-gaap_OperatingLossCarryforwards
/ us-gaap_StatementScenarioAxis
= ins_PriorToTheirAcquisitionByTheCompanyMember