Note 18. Segment and Geographical Information (Details) - Net Revenue Attributable to Each Target Market (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Nov. 02, 2013	Oct. 27, 2012	Nov. 02, 2013	Oct. 27, 2012
Segment Reporting Information [Line Items]
Net revenue by segments	$ 54,394	$ 63,905	$ 160,696	$ 172,414
DTV [Member]
Segment Reporting Information [Line Items]
Net revenue by segments	13,078	30,140	43,358	61,766
Home Networking [Member]
Segment Reporting Information [Line Items]
Net revenue by segments	19,409	19,735	59,147	62,991
IPTV Hybrid [Member]
Segment Reporting Information [Line Items]
Net revenue by segments	9,595	9,059	30,390	34,534
Home Control And Energy Management [Member]
Segment Reporting Information [Line Items]
Net revenue by segments	5,952	4,803	16,390	11,209
License And Other [Member]
Segment Reporting Information [Line Items]
Net revenue by segments	$ 6,360	$ 168	$ 11,411	$ 1,914