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Note 7 - Income Taxes (Restated) (Details) - Net Operating Loss Carryforwards (USD $) In Thousands, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013
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Operating Loss Carryforwards [Line Items] |  |
Operating loss carryforward | $ 11,036 us-gaap_OperatingLossCarryforwards | $ 18,647 us-gaap_OperatingLossCarryforwards
2019 [Member] |  |
Operating Loss Carryforwards [Line Items] |  |
Operating loss carryforward |  | 2,901 us-gaap_OperatingLossCarryforwards / ins_ExpirationYearAxis = ins_TwoThousandNineteenMember
2021 [Member] |  |
Operating Loss Carryforwards [Line Items] |  |
Operating loss carryforward | 689 us-gaap_OperatingLossCarryforwards / ins_ExpirationYearAxis = ins_TwoThousandTwentyOneMember | 1,184 us-gaap_OperatingLossCarryforwards / ins_ExpirationYearAxis = ins_TwoThousandTwentyOneMember
2022 [Member] |  |
Operating Loss Carryforwards [Line Items] |  |
Operating loss carryforward | 849 us-gaap_OperatingLossCarryforwards / ins_ExpirationYearAxis = ins_TwoThousandTwentyTwoMember | 1,083 us-gaap_OperatingLossCarryforwards / ins_ExpirationYearAxis = ins_TwoThousandTwentyTwoMember
2023 [Member] |  |
Operating Loss Carryforwards [Line Items] |  |
Operating loss carryforward |  | 1,302 us-gaap_OperatingLossCarryforwards / ins_ExpirationYearAxis = ins_TwoThousandTwentyThreeMember
Thereafter [Member] |  |
Operating Loss Carryforwards [Line Items] |  |
Operating loss carryforward | $ 9,498 us-gaap_OperatingLossCarryforwards / ins_ExpirationYearAxis = ins_ThereafterMember | $ 12,177 us-gaap_OperatingLossCarryforwards / ins_ExpirationYearAxis = ins_ThereafterMember

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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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