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Note 12 - Stockholders' Equity (Details) (USD $) | Dec. 31, 2014 | Dec. 31, 2013
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Stockholders' Equity Note [Abstract] |  |
Common Stock, Shares Authorized | 20,000,000 us-gaap_CommonStockSharesAuthorized | 20,000,000 us-gaap_CommonStockSharesAuthorized
Common Stock, Par or Stated Value Per Share (in Dollars per share) | $ 0.01 us-gaap_CommonStockParOrStatedValuePerShare | $ 0.01 us-gaap_CommonStockParOrStatedValuePerShare
Special Stock, Shares Authorized | 2,000,000 ins_SpecialStockSharesAuthorized |
Special Stock, Shares Outstanding | 0 ins_SpecialStockSharesOutstanding |

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- Definition The amount of special shares authorized at report date. + References No definition available. + Details
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Balance Type: | na
Period Type: | instant

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- Definition The amount of special shares of stock outstanding. + References No definition available. + Details
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Namespace Prefix: | ins_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

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- Definition Face amount or stated value per share of common stock. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 30 -Article 5 + Details
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Data Type: | num:perShareItemType
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- Definition The maximum number of common shares permitted to be issued by an entity's charter and bylaws. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 30 -Article 5 + Details
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Balance Type: | na
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- Details
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