Note 10. Business Combinations (Detail) (USD $)	0 Months Ended	12 Months Ended		0 Months Ended	12 Months Ended
	May 04, 2012	Feb. 02, 2013	Mar. 21, 2011 Acquisition of Computer Manufacturer [Member]	May 04, 2012 Trident Microsystems, Inc. [Member]	Feb. 02, 2013 Trident Microsystems, Inc. [Member]
Business Acquisition, Cost of Acquired Entity, Cash Paid			$ 5,000,000	$ 38,210,000
Business Acquisition, Cost of Acquired Entity, Purchase Price	38,200,000			38,210,000
Business Combination, Bargain Purchase, Gain Recognized, Amount	1,389,000	1,389,000		1,400,000
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual					66,600,000
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual					5,200,000
Business Acquisition Amount Receivable From Seller		4,500,000
Business Combination, Acquisition Related Costs					$ 4,000,000