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Note 7 - Concentration of Revenue (Detail) - Concentration of Revenue	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
ChemFree Customer A [Member]
Percentage of consolidated revenue	29.00%	22.00%	29.00%	26.80%
ChemFree Customer B [Member]
Percentage of consolidated revenue	10.00%		10.00%
ChemFree Customer C [Member]
Percentage of consolidated revenue	11.50%		12.90%	10.20%
CoreCard Customer D [Member]
Percentage of consolidated revenue		28.40%		11.30%

X

- Definition

No authoritative reference available.

+ References

No definition available.

+ Details

Name:	ins_PercentageOfConsolidatedRevenue
Namespace Prefix:	ins_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration