Note 12 - Net Revenue to Each Significant Country Based on the Ship-to Location (Details) - USD ($) $ in Thousands	3 Months Ended
Apr. 30, 2016	May. 02, 2015
CHINA
Revenue, Net	$ 27,457	$ 22,177
TAIWAN, PROVINCE OF CHINA
Revenue, Net	13,964	8,919
UNITED STATES
Revenue, Net	6,589	12,146
THAILAND
Revenue, Net	2,821	4,985
Rest of the World [Member]
Revenue, Net	2,944	7,685
Revenue, Net	$ 53,775	$ 55,912

Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration