Note 10 - Other Operating Income and Expense (Details Textual) - USD ($)	9 Months Ended
	Dec. 29, 2018	Dec. 30, 2017
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property	$ 3,920,000	$ 1,590,000
Business Combination, Bargain Purchase, Gain Recognized, Amount		$ 1,078,000