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Retail Access and Distribution Agreement (Details Narrative)	12 Months Ended
	Dec. 31, 2017 USD ($)
Valassis Sales And Marketing Services Inc [Member]
Marketing and Service Agreement Amortization expense	$ 64,000

X

- Definition

Represents the amortization expenses for a marketing and service agreement.

+ References

No definition available.

+ Details

Name:	isig_MarketingAndServiceAgreementAmortizationExpense
Namespace Prefix:	isig_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

Name:	dei_LegalEntityAxis=isig_ValassisSalesAndMarketingServicesIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: