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Note 14. Stock Based Compensation (Detail) - Summary Stock-Based Compensation Expense Related to Stock Options and RSUs (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2013	Apr. 01, 2012	Mar. 27, 2011
Stock-based compensation expense	$ 4,788	$ 3,750	$ 7,381
Cost of Sales [Member]
Stock-based compensation expense	469	301	489
Research and Development Expense [Member]
Stock-based compensation expense	789	1,239	3,241
Selling, General and Administrative Expenses [Member]
Stock-based compensation expense	$ 3,530	$ 2,210	$ 3,651

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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