Note 7 - Stockholders' Equity (Details Textual) - USD ($) $ in Thousands	6 Months Ended
	Oct. 02, 2021	Sep. 26, 2020	Mar. 31, 2021
Treasury Stock, Shares, Ending Balance (in shares)	3,400,000
Treasury Stock, Value, Ending Balance	$ 108,507	$ 89,482	$ 91,198
Common Class A [Member]
Treasury Stock, Shares, Acquired (in shares)	342,472	28,600
Treasury Stock, Value, Acquired, Cost Method	$ 17,300	$ 1,200