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