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Note 10 - Other Operating Income and Expense (Details Textual) - USD ($)
6 Months Ended
Sep. 29, 2018
Sep. 30, 2017
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property $ 4,060,000 $ 1,591,000
Business Combination, Bargain Purchase, Gain Recognized, Amount $ 1,096,000