Note 8. Business Combinations (Details) (USD $)	0 Months Ended	1 Months Ended	3 Months Ended		9 Months Ended
	May 04, 2012	May 31, 2012	Nov. 02, 2013	Oct. 27, 2012	Nov. 02, 2013	Oct. 27, 2012
Note 8. Business Combinations (Details) [Line Items]
Business Combination, Bargain Purchase, Gain Recognized, Amount					$ 1,417,000
Trident Microsystems, Inc. [Member]
Note 8. Business Combinations (Details) [Line Items]
Business Combination, Consideration Transferred	38,200,000				38,210,000
Business Combination, Bargain Purchase, Gain Recognized, Amount		1,400,000
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual			9,800,000	27,800,000	36,700,000	54,400,000
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual			(2,900,000)	1,200,000	(4,400,000)	(900,000)
Business Combination, Acquisition Related Costs						$ 4,000,000