Note 14 - Segment and Geographical Information - Net Revenue and Gross Profit by Segments (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Jan. 28, 2017	Oct. 29, 2016	Jul. 30, 2016	Apr. 30, 2016	Jan. 30, 2016	Oct. 31, 2015	Aug. 01, 2015	May 02, 2015	Jan. 28, 2017	Jan. 30, 2016	Jan. 31, 2015
Sales revenue, net	$ 42,724	$ 62,729	$ 61,316	$ 53,775	$ 51,450	$ 61,581	$ 58,307	$ 55,912	$ 220,544	$ 227,250	$ 188,313
Connected Smart TV Platforms [Member]
Sales revenue, net									175,085	180,360	151,775
IoT Devices [Member]
Sales revenue, net									45,159	46,792	30,667
License and Other [Member]
Sales revenue, net									$ 300	$ 98	$ 5,871