Note 7 - Income Taxes - Reconciliation of Unrecognized Tax Benefits (Details) $ in Thousands	12 Months Ended
Jan. 31, 2017 USD ($)
Balance at February 1, 2016	$ 767
Reductions due to lapses of statute of limitations
Balance at January 31, 2017	$ 767

Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15A
-Subparagraph (a)(4)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration