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Subsequent Events (Details) (Subsequent event, Valassis, USD $)	Feb. 28, 2014
Subsequent event | Valassis
Subsequent events
Payment made for marketing and service agreement	$ 500,000

X

- Definition

Represents the payment made for marketing and service agreement.

+ References

No definition available.

+ Details

Name:	isig_PaymentForMarketingAndServiceAgreement
Namespace Prefix:	isig_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

Name:	us-gaap_SubsequentEventLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration