Note 14 - Lease Financing Obligation (Details) - Amortization Expense Related to the Design Tools - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 27, 2015	Sep. 28, 2014	Sep. 27, 2015	Sep. 28, 2014
Design Tools [Member]
Note 14 - Lease Financing Obligation (Details) - Amortization Expense Related to the Design Tools [Line Items]
Amortization expense	$ 965	$ 800	$ 2,038	$ 1,600