Note 8 - Restructuring Charges and Exit Costs (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended					9 Months Ended	3 Months Ended		9 Months Ended		12 Months Ended	3 Months Ended		9 Months Ended		12 Months Ended	9 Months Ended		3 Months Ended
	Dec. 29, 2013	Mar. 31, 2013	Dec. 30, 2012	Sep. 30, 2012	Jul. 01, 2012	Dec. 29, 2013	Dec. 29, 2013 Cost of Sales [Member]	Dec. 30, 2012 Cost of Sales [Member]	Dec. 29, 2013 Cost of Sales [Member]	Dec. 30, 2012 Cost of Sales [Member]	Mar. 31, 2013 Cost of Sales [Member]	Dec. 29, 2013 Operating Expense [Member]	Dec. 30, 2012 Operating Expense [Member]	Dec. 29, 2013 Operating Expense [Member]	Dec. 30, 2012 Operating Expense [Member]	Mar. 31, 2013 Operating Expense [Member]	Dec. 29, 2013 Employee Severance [Member]	Dec. 29, 2013 Facility Closing [Member]	Mar. 31, 2013 Industrial Research Assistance Program [Member]
Note 8 - Restructuring Charges and Exit Costs (Details) [Line Items]
Restructuring Charges	$ 100	$ 300	$ 600	$ 300	$ 900	$ 1,500	$ 17	$ 79	$ 122	$ 160	$ 300	$ 74	$ 524	$ 1,389	$ 1,619	$ 1,300	$ 1,400	$ 200	$ (500)