Note 12 - Segment and Geographical Information - Net Revenue and Gross Profit by Segments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 29, 2017	Jul. 30, 2016	Jul. 29, 2017	Jul. 30, 2016
Sales revenue, net	$ 39,508	$ 61,316	$ 79,072	$ 115,091
Connected Smart TV Platforms [Member]
Sales revenue, net	26,111	51,678	54,001	95,386
IoT Devices [Member]
Sales revenue, net	13,397	9,488	25,071	19,405
License and Other [Member]
Sales revenue, net		$ 150		$ 300