Note 3 - Earnings Per Common Share - Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 28, 2024	Dec. 30, 2023	Dec. 28, 2024	Dec. 30, 2023
Net earnings	$ 14,659	$ 17,675	$ 40,623	$ 65,565
Deduct preferred stock dividends paid	11	6	23	17
Undistributed net earnings	14,648	17,669	40,600	65,548
Earnings attributable to participating preferred shareholders	17	21	48	73
Earnings attributable to common shareholders	$ 14,631	$ 17,648	$ 40,552	$ 65,475
Weighted average common shares outstanding (in shares)	6,887	7,131	6,921	7,391
Basic earnings per common share (in dollars per share)	$ 2.12	$ 2.47	$ 5.86	$ 8.86
Earnings attributable to common shareholders	$ 14,631	$ 17,648	$ 40,552	$ 65,475
Add dividends on convertible preferred stock	5	5	15	15
Earnings attributable to common stock on a diluted basis	$ 14,636	$ 17,653	$ 40,567	$ 65,490
Additional shares to be issued under full conversion of preferred stock (in shares)	67	67	67	67
Total shares for diluted (in shares)	6,954	7,198	6,988	7,458
Diluted earnings per common share (in dollars per share)	$ 2.1	$ 2.45	$ 5.81	$ 8.78