Note 14 - Revenue Attributable to Each Target Market (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Nov. 01, 2014	Nov. 02, 2013	Nov. 01, 2014	Nov. 02, 2013
Revenue from external customers	$ 53,784	$ 54,394	$ 133,467	$ 160,696
Gross profit	26,512	31,083	68,626	86,095
DTV [Member]
Revenue from external customers	16,570	13,078	32,667	43,358
Gross profit	6,602	6,247	13,125	17,604
Home Control [Member]
Revenue from external customers	7,182	5,952	19,898	16,390
Gross profit	3,634	3,061	10,132	8,052
Home Networking [Member]
Revenue from external customers	23,022	19,409	56,968	59,147
Gross profit	13,235	9,961	32,262	33,309
License and Other [Member]
Revenue from external customers	251	6,360	5,958	11,411
Gross profit	156	6,052	5,101	10,851
Set-top Box [Member]
Revenue from external customers	6,759	9,595	17,976	30,390
Gross profit	$ 2,885	$ 5,762	$ 8,006	$ 16,279