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Note 15. Equity Incentive Plans and Employee Benefits (Detail) - Stock-Based Compensation Expense (USD $) In Thousands, unless otherwise specified	3 Months Ended
	May 04, 2013	Apr. 28, 2012
Stock-based compensation	$ 2,033	$ 2,826
Cost of Sales [Member]
Stock-based compensation	83	117
Research and Development Expense [Member]
Stock-based compensation	1,090	1,463
Selling and Marketing Expense [Member]
Stock-based compensation	349	472
General and Administrative Expense [Member]
Stock-based compensation	$ 511	$ 774

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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