Note 11 - Restructuring Charges and Exit Costs (Details) - Summary of Activities Affecting Liabilities $ in Thousands	6 Months Ended
	Sep. 27, 2015 USD ($)
Restructuring Cost and Reserve [Line Items]
Beginning Balance	$ 982
Additions/adjustments	2,061
Non-cash charges	(850)
Payments	(2,024)
Ending Balance	169
Lease Contract Termination Costs [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance	330
Additions/adjustments	57
Non-cash charges	(110)
Payments	(210)
Ending Balance	67
Impairment of Fixed Assets and Write Down of Inventory [Member]
Restructuring Cost and Reserve [Line Items]
Additions/adjustments	740
Non-cash charges	(740)
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance	652
Additions/adjustments	1,264
Payments	(1,814)
Ending Balance	$ 102