Note 12 - Segment and Geographical Information - Net Revenue Based on the Ship-to Location (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 29, 2017	Jul. 30, 2016	Jul. 29, 2017	Jul. 30, 2016
Net revenue	$ 39,508	$ 61,316	$ 79,072	$ 115,091
Asia [Member]
Net revenue	34,573	47,873	66,495	93,914
North America [Member]
Net revenue	2,527	11,391	8,346	18,006
Europe [Member]
Net revenue	2,408	2,038	4,231	3,157
Other Regions [Member]
Net revenue		$ 14		$ 14