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Note 8 - Commitments and Contingencies (Details) (USD $) | 12 Months Ended | 0 Months Ended | 1 Months Ended | 3 Months Ended
--- | --- | --- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013 | May 12, 2014 | Apr. 30, 2013 | Mar. 31, 2014
Note 8 - Commitments and Contingencies (Details) [Line Items] |  |  |  |  |
Due to Related Parties | $ 194,000 us-gaap_DueToRelatedPartiesCurrentAndNoncurrent |  |  |  |
Operating Leases, Rent Expense | 468,000 us-gaap_LeaseAndRentalExpense | 467,000 us-gaap_LeaseAndRentalExpense |  |  |
Operating Leases, Rent Expense, Sublease Rentals | 23,000 us-gaap_OperatingLeasesRentExpenseSubleaseRentals1 | 27,000 us-gaap_OperatingLeasesRentExpenseSubleaseRentals1 |  |  |
Litigation Settlement, Expense | 387,000 us-gaap_LitigationSettlementExpense | 259,000 us-gaap_LitigationSettlementExpense |  |  |
Payment Due within 5 days of the Settlement [Member] | Clearwater Environmental Services [Member] |  |  |  |  |
Note 8 - Commitments and Contingencies (Details) [Line Items] |  |  |  |  |
Litigation Settlement, Amount |  |  | 236,000 us-gaap_LitigationSettlementAmount / us-gaap_LitigationCaseAxis = ins_ClearwaterEnvironmentalServicesMember / us-gaap_StatementScenarioAxis = ins_PaymentDueWithin5DaysOfTheSettlementMember |  |
Payment Due 90 Days after the Settlement [Member] | Clearwater Environmental Services [Member] |  |  |  |  |
Note 8 - Commitments and Contingencies (Details) [Line Items] |  |  |  |  |
Litigation Settlement, Amount |  |  | 235,000 us-gaap_LitigationSettlementAmount / us-gaap_LitigationCaseAxis = ins_ClearwaterEnvironmentalServicesMember / us-gaap_StatementScenarioAxis = ins_PaymentDue90DaysAfterTheSettlementMember |  |
Payment Due 180 Days after the Settlement [Member] | Clearwater Environmental Services [Member] |  |  |  |  |
Note 8 - Commitments and Contingencies (Details) [Line Items] |  |  |  |  |
Litigation Settlement, Amount |  |  | 235,000 us-gaap_LitigationSettlementAmount / us-gaap_LitigationCaseAxis = ins_ClearwaterEnvironmentalServicesMember / us-gaap_StatementScenarioAxis = ins_PaymentDue180DaysAfterTheSettlementMember |  |
Clearwater Environmental Services [Member] | Minimum [Member] |  |  |  |  |
Note 8 - Commitments and Contingencies (Details) [Line Items] |  |  |  |  |
Loss Contingency, Damages Sought, Value |  |  |  | 1,700,000 us-gaap_LossContingencyDamagesSoughtValue / us-gaap_LitigationCaseAxis = ins_ClearwaterEnvironmentalServicesMember / us-gaap_RangeAxis = us-gaap_MinimumMember |
Clearwater Environmental Services [Member] |  |  |  |  |
Note 8 - Commitments and Contingencies (Details) [Line Items] |  |  |  |  |
Litigation Settlement, Amount |  |  | 706,000 us-gaap_LitigationSettlementAmount / us-gaap_LitigationCaseAxis = ins_ClearwaterEnvironmentalServicesMember |  |
Litigation Settlement, Expense |  | 61,000 us-gaap_LitigationSettlementExpense / us-gaap_LitigationCaseAxis = ins_ClearwaterEnvironmentalServicesMember |  |  | 387,000 us-gaap_LitigationSettlementExpense / us-gaap_LitigationCaseAxis = ins_ClearwaterEnvironmentalServicesMember
Payments for Legal Settlements |  | $ 61,000 us-gaap_PaymentsForLegalSettlements / us-gaap_LitigationCaseAxis = ins_ClearwaterEnvironmentalServicesMember |  |  |

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- Definition Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line. + References No definition available. + Details
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- Definition The amount of cash paid for the settlement of litigation or for other legal issues during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3536-108585 + Details
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