Note 17. Segment and Geographical Information (Detail) - Net Revenue Attributable to Each Target Market (USD $) In Thousands, unless otherwise specified	3 Months Ended
	May 04, 2013	Apr. 28, 2012
Net revenue by segments	$ 52,540	$ 40,258
DTV [Member]
Net revenue by segments	15,842	2,571
Home Networking [Member]
Net revenue by segments	20,181	20,838
IPTV Hybrid [Member]
Net revenue by segments	9,315	13,542
Home Control And Energy Management [Member]
Net revenue by segments	4,589	3,184
License And Other [Member]
Net revenue by segments	$ 2,613	$ 123