Note 17. Segment and Geographical Information (Details) - Net Revenue Attributable to Each Target Market (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Aug. 03, 2013	Jul. 28, 2012	Aug. 03, 2013	Jul. 28, 2012
Segment Reporting Information [Line Items]
Net revenue by segments	$ 53,762	$ 68,251	$ 106,302	$ 108,509
DTV [Member]
Segment Reporting Information [Line Items]
Net revenue by segments	14,438	29,055	30,280	31,626
Home Networking [Member]
Segment Reporting Information [Line Items]
Net revenue by segments	19,557	22,418	39,738	43,256
IPTV Hybrid [Member]
Segment Reporting Information [Line Items]
Net revenue by segments	11,480	11,933	20,795	25,475
Home Control And Energy Management [Member]
Segment Reporting Information [Line Items]
Net revenue by segments	5,849	3,222	10,438	6,406
License And Other [Member]
Segment Reporting Information [Line Items]
Net revenue by segments	$ 2,438	$ 1,623	$ 5,051	$ 1,746