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Note 3 - Option Agreement (Details Textual) - USD ($) |  | 12 Months Ended |  |
--- | --- | --- | --- | ---
Mar. 20, 2012 | Dec. 31, 2012 | Dec. 31, 2017 | Dec. 31, 2016
Option Agreement, Equity Interests Issuable, Percentage | 5.00% |  |  |
Option Agreement, Exercise Price | $ 1,000,000 |  |  |
Option Agreement, Marketing, Expense |  | $ 18,000 |  |
Option Agreement, Long-term Liability |  | $ 18,000 | $ 0 | $ 18,000

X
- Definition The percentage of the company's equity interests issuable upon the exercise of the option agreement. + References No definition available. + Details
Name: | ins_OptionAgreementEquityInterestsIssuablePercentage
Namespace Prefix: | ins_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The exercise price of an option pursuant to the agreement. + References No definition available. + Details
Name: | ins_OptionAgreementExercisePrice
Namespace Prefix: | ins_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of long-term liability related to the financial impact of the option agreement. + References No definition available. + Details
Name: | ins_OptionAgreementLongtermLiability
Namespace Prefix: | ins_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of expenses related to the option agreement and recorded in the marketing category. + References No definition available. + Details
Name: | ins_OptionAgreementMarketingExpense
Namespace Prefix: | ins_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration