Annual report pursuant to Section 13 and 15(d)

Note 12 - Commitments and Contingencies (Details Textual)

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Note 12 - Commitments and Contingencies (Details Textual) - USD ($)
12 Months Ended
Mar. 29, 2020
Mar. 31, 2019
Royalty Expense $ 4,900,000 $ 5,200,000
Royalty Expense Due 4,200,000  
Royalty Expense Due in Next Twelve Months 2,600,000  
Royalty Expense Due in Two Years 1,600,000  
Royalty Expense Due in Three Years $ 8,000