Note 10 - Restructuring Charges and Exit Costs (Details Textual) - USD ($)	3 Months Ended		9 Months Ended
	Jan. 01, 2017	Dec. 27, 2015	Jan. 01, 2017	Dec. 27, 2015
Restructuring Charges	$ 0	$ 2,600,000	$ 1,100,000	$ 5,600,000
Cost of Sales [Member]
Restructuring Charges			225,000	740,000
Operating Expense [Member]
Restructuring Charges		$ 2,639,000	$ 923,000	$ 4,846,000