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Note 3 - Earnings Per Share - Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023 | Mar. 31, 2022
Net earnings | $ 63,318 | $ 9,231 | $ 46,200
Deduct preferred stock dividends paid | 23 | 23 | 23
Undistributed net earnings | 63,295 | 9,208 | 46,177
Earnings attributable to participating preferred shareholders | 72 | 30 | 178
Earnings attributable to common shareholders | $ 63,223 | $ 9,178 | $ 45,999
Weighted average common shares outstanding (in shares) | 7,318 | 7,796 | 8,707
Basic earnings per common share (in dollars per share) | $ 8.64 | $ 1.19 | $ 5.28
Earnings attributable to common shareholders | $ 63,223 | $ 9,178 | $ 45,999
Add dividends on convertible preferred stock | 20 | 20 | 20
Earnings attributable to common stock on a diluted basis | $ 63,243 | $ 9,198 | $ 46,019
Additional shares to be issued under full conversion of preferred stock (in shares) | 67 | 67 | 67
Total shares for diluted (in shares) | 7,385 | 7,863 | 8,774
Diluted earnings per common share (in dollars per share) | $ 8.56 | $ 1.16 | $ 5.24

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