Note 16 - Segment and Geographical Information - Net Revenue to Each Significant Country Based on the Ship-to Location (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Feb. 03, 2018	Oct. 28, 2017	Jul. 29, 2017	Apr. 29, 2017	Jan. 28, 2017	Oct. 29, 2016	Jul. 30, 2016	Apr. 30, 2016	Feb. 03, 2018	Jan. 28, 2017	Jan. 30, 2016
Less: Discontinued operations									$ (73,566)	$ (86,137)	$ (101,499)
Sales revenue, net	$ 26,537	$ 33,862	$ 39,508	$ 39,564	$ 42,724	$ 62,729	$ 61,316	$ 53,775	65,905	134,407	125,751
CHINA
Sales revenue, net, including discontinued operations									65,048	110,195	93,560
TAIWAN, PROVINCE OF CHINA
Sales revenue, net, including discontinued operations									38,673	51,093	50,301
UNITED STATES
Sales revenue, net, including discontinued operations									13,892	32,367	41,781
THAILAND
Sales revenue, net, including discontinued operations									1,852	9,487	13,532
Rest of the World [Member]
Sales revenue, net, including discontinued operations									$ 20,006	$ 17,402	$ 28,076