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Note 18 - Restatement (Details) (USD $) | Dec. 31, 2014 | Dec. 31, 2013
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Note 18 - Restatement (Details) [Line Items] |  |
Deferred Tax Assets, Capital Loss Carryforwards | $ 3,570,000 us-gaap_DeferredTaxAssetsCapitalLossCarryforwards |
Operating Loss Carryforwards | 11,036,000 us-gaap_OperatingLossCarryforwards | 18,647,000 us-gaap_OperatingLossCarryforwards
Domestic Tax Authority [Member] | VISaer [Member] | Capital Loss Carryforward [Member] |  |
Note 18 - Restatement (Details) [Line Items] |  |
Tax Credit Carryforward, Amount | 10,200,000 us-gaap_TaxCreditCarryforwardAmount / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ins_VISaerMember / us-gaap_TaxCreditCarryforwardAxis = us-gaap_CapitalLossCarryforwardMember |
Scenario, Previously Reported [Member] | Adjustment to Operating Loss Carryforwards Subject to Separate Return Limitation Year Rules [Member] |  |
Note 18 - Restatement (Details) [Line Items] |  |
Operating Loss Carryforwards | 11,300,000 us-gaap_OperatingLossCarryforwards / us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementByRestatementPeriodAndAmountAxis = ins_AdjustmentToOperatingLossCarryforwardsSubjectToSeparateReturnLimitationYearRulesMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember |
Scenario, Previously Reported [Member] |  |
Note 18 - Restatement (Details) [Line Items] |  |
Operating Loss Carryforwards | 20,112,000 us-gaap_OperatingLossCarryforwards / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember |
VISaer [Member] |  |
Note 18 - Restatement (Details) [Line Items] |  |
Deferred Tax Assets, Capital Loss Carryforwards | 3,600,000 us-gaap_DeferredTaxAssetsCapitalLossCarryforwards / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ins_VISaerMember |
Adjustment to Operating Loss Carryforwards Subject to Separate Return Limitation Year Rules [Member] |  |
Note 18 - Restatement (Details) [Line Items] |  |
Operating Loss Carryforwards | $ 1,500,000 us-gaap_OperatingLossCarryforwards / us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementByRestatementPeriodAndAmountAxis = ins_AdjustmentToOperatingLossCarryforwardsSubjectToSeparateReturnLimitationYearRulesMember |

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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible capital loss carryforwards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32621-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=29652012&loc=d3e28680-109314 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32632-109319 + Details
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- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319 + Details
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- Definition The amount of the tax credit carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Carryforwards -URI http://asc.fasb.org/extlink&oid=6506874 + Details
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