Note 12 - Stock-based Compensation (Details) - Unrecognized Stock-based Compensation Expense Related to Stock Options and RSUs (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Dec. 28, 2014
Note 12 - Stock-based Compensation (Details) - Unrecognized Stock-based Compensation Expense Related to Stock Options and RSUs [Line Items]
Amount	$ 19,174
Employee Stock Option [Member]
Note 12 - Stock-based Compensation (Details) - Unrecognized Stock-based Compensation Expense Related to Stock Options and RSUs [Line Items]
Amount	10,338
Weighted Average Expected Remaining Period	2 years 164 days
Performance Shares [Member]
Note 12 - Stock-based Compensation (Details) - Unrecognized Stock-based Compensation Expense Related to Stock Options and RSUs [Line Items]
Amount	456
Weighted Average Expected Remaining Period	1 year 251 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	7,051
Weighted Average Expected Remaining Period	1 year 324 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	$ 1,329
Weighted Average Expected Remaining Period	1 year 357 days