Note 14 - Stock-Based Compensation (Details) - Stock-Based Compensation Expense Related to Stock Options and RSUs (USD $)	12 Months Ended
	Mar. 30, 2014	Mar. 31, 2013	Apr. 01, 2012
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-Based Compensation Expense categories	$ 8,852,000	$ 4,788,000	$ 3,750,000
Cost of Sales [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-Based Compensation Expense categories	714,000	469,000	301,000
Research and Development Expense [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-Based Compensation Expense categories	1,974,000	789,000	1,239,000
Selling and Marketing Expense [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-Based Compensation Expense categories	$ 6,164,000	$ 3,530,000	$ 2,210,000