Note 3 - Earnings Per Common Share - Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Jul. 02, 2022	Jul. 03, 2021
Net earnings	$ 5,103	$ 14,136
Deduct preferred stock dividends paid	6	6
Undistributed net earnings	5,097	14,130
Earnings attributable to participating preferred	20	54
Earnings attributable to common shareholders	$ 5,077	$ 14,076
Weighted average common shares outstanding (in shares)	8,155	9,025
Basic earnings per common share (in dollars per share)	$ 0.62	$ 1.56
Earnings attributable to common shareholders	$ 5,077	$ 14,076
Add dividends on convertible preferred stock	5	5
Earnings attributable to common stock on a diluted basis	$ 5,082	$ 14,081
Additional shares issued related to the equity compensation plan (in shares)	5	5
Additional shares to be issued under full conversion of preferred stock (in shares)	67	67
Total shares for diluted (in shares)	8,227	9,097
Diluted earnings per common share (in dollars per share)	$ 0.62	$ 1.55