Note 14 - Segment and Geographical Information (Details) - Revenue Attributable to Each Target Market (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Aug. 02, 2014	Aug. 03, 2013	Aug. 02, 2014	Aug. 03, 2013
Segment Reporting Information [Line Items]
Revenue from external customers	$ 42,810	$ 53,762	$ 79,683	$ 106,302
Gross profit	21,889	28,066	42,114	55,012
DTV [Member]
Segment Reporting Information [Line Items]
Revenue from external customers	10,033	14,438	16,097	30,280
Gross profit	3,652	5,364	6,523	11,357
Home Networking [Member]
Segment Reporting Information [Line Items]
Revenue from external customers	17,827	19,557	33,946	39,737
Gross profit	10,105	11,107	19,027	23,348
Set-Top Box [Member]
Segment Reporting Information [Line Items]
Revenue from external customers	5,528	11,480	11,217	20,795
Gross profit	2,406	6,265	5,121	10,518
Home Control and Energy Management [Member]
Segment Reporting Information [Line Items]
Revenue from external customers	6,576	5,849	12,716	10,438
Gross profit	3,275	3,059	6,498	4,991
License and Other [Member]
Segment Reporting Information [Line Items]
Revenue from external customers	2,846	2,438	5,707	5,052
Gross profit	$ 2,451	$ 2,271	$ 4,945	$ 4,798