Note 12 - Stock-Based Compensation (Details) - Unrecognized Stock-Based Compensation Expense Related to Stock Options and RSUs (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Sep. 28, 2014
Note 12 - Stock-Based Compensation (Details) - Unrecognized Stock-Based Compensation Expense Related to Stock Options and RSUs [Line Items]
Amount	$ 17,219
Employee Stock Option [Member]
Note 12 - Stock-Based Compensation (Details) - Unrecognized Stock-Based Compensation Expense Related to Stock Options and RSUs [Line Items]
Amount	9,898
Weighted Average Expected Remaining Period	2 years 160 days
Performance Shares [Member]
Note 12 - Stock-Based Compensation (Details) - Unrecognized Stock-Based Compensation Expense Related to Stock Options and RSUs [Line Items]
Amount	531
Weighted Average Expected Remaining Period	1 year 350 days
Restricted Stock Units (RSUs) [Member]
Note 12 - Stock-Based Compensation (Details) - Unrecognized Stock-Based Compensation Expense Related to Stock Options and RSUs [Line Items]
Amount	4,896
Weighted Average Expected Remaining Period	1 year 361 days
Performance-Based RSUs [Member]
Note 12 - Stock-Based Compensation (Details) - Unrecognized Stock-Based Compensation Expense Related to Stock Options and RSUs [Line Items]
Amount	$ 1,894
Weighted Average Expected Remaining Period	2 years 80 days