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v2.4.1.9

Note 9 - Post-retirement Benefits (Details) (USD $) | Dec. 31, 2014 | Dec. 31, 2013
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Compensation and Retirement Disclosure [Abstract] |  |
Retirement Plan Minimum Age | 65 ins_RetirementPlanMinimumAge |
Retirement Plan Lump Sum Cash Payment Per Year | $ 5,000 ins_RetirementPlanLumpSumCashPaymentPerYear |
Retirement Plan Lump Sum Cash Payment, Maximum | 50,000 ins_RetirementPlanLumpSumCashPaymentMaximum |
Retirement Plan Lump Sum Cash Payment, Accrual | $ 125,000 ins_RetirementPlanLumpSumCashPaymentAccrual | $ 141,000 ins_RetirementPlanLumpSumCashPaymentAccrual

X
- Definition The accrued amount of lump sums paid to employees as part of the company's post-retirement benefit plan. + References No definition available. + Details
Name: | ins_RetirementPlanLumpSumCashPaymentAccrual
Namespace Prefix: | ins_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The maximum amount an employee can receive as part of the company's post-retirement benefit plan. + References No definition available. + Details
Name: | ins_RetirementPlanLumpSumCashPaymentMaximum
Namespace Prefix: | ins_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount contributed to an employee's post-retirement lump sum receipt for every year of the employee's service with the company. + References No definition available. + Details
Name: | ins_RetirementPlanLumpSumCashPaymentPerYear
Namespace Prefix: | ins_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The minimum age for which an employee can enter into the company's retirement plan. + References No definition available. + Details
Name: | ins_RetirementPlanMinimumAge
Namespace Prefix: | ins_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_CompensationAndRetirementDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration