Note 14 - Segment and Geographical Information (Details) - Revenue Attributable to Each Target Market (USD $) In Thousands, unless otherwise specified	3 Months Ended
	May 03, 2014	May 04, 2013
Segment Reporting Information [Line Items]
Revenue from external customers	$ 36,873	$ 52,540
Gross profit	20,225	26,946
DTV [Member]
Segment Reporting Information [Line Items]
Revenue from external customers	6,063	15,842
Gross profit	2,871	5,993
Home Networking [Member]
Segment Reporting Information [Line Items]
Revenue from external customers	16,120	20,181
Gross profit	8,922	12,241
Set-Top Box [Member]
Segment Reporting Information [Line Items]
Revenue from external customers	5,689	9,315
Gross profit	2,715	4,253
Home Control and Energy Management [Member]
Segment Reporting Information [Line Items]
Revenue from external customers	6,140	4,589
Gross profit	3,223	1,932
License and Other [Member]
Segment Reporting Information [Line Items]
Revenue from external customers	2,861	2,613
Gross profit	$ 2,494	$ 2,527