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Note 3 - Restructuring Charges (Details) (USD $) In Millions, unless otherwise specified	1 Months Ended
	Nov. 19, 2010
Restructuring and Related Activities Disclosure [Text Block]
Payments to Acquire Businesses, Gross	$ 50.3

X

- Details

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Namespace Prefix:	iiin_
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Period Type:	duration

X

- Definition

The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 13

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585

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