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Condensed Consolidated Statements of Equity (Unaudited) - USD ($)
$ in Thousands
Common Stock [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
Treasury Stock, Common [Member]
Noncontrolling Interest [Member]
Total
Balance (in shares) at Apr. 30, 2022 13,642,185          
Balance at Apr. 30, 2022 $ 136 $ 103,113 $ 665,410 $ (292,225) $ 100 $ 476,534
Issuance of common stock (in shares) 30,484          
Issuance of common stock $ 1 84 0 0 0 85
Stock options exercised (in shares) 23,000          
Stock options exercised $ 0 1,216 0 0 0 1,216
Purchase of treasury shares 0 0 0 (5,196) 0 (5,196)
Stock based compensation 0 1,978 0 0 0 1,978
Dividends on subsidiary preferred stock 0 0 (10) 0 0 (10)
Net (loss) income $ 0 0 13,697 0 0 13,697
Balance (in shares) at Jul. 31, 2022 13,695,669          
Balance at Jul. 31, 2022 $ 137 106,391 679,097 (297,421) 100 488,304
Balance (in shares) at Apr. 30, 2022 13,642,185          
Balance at Apr. 30, 2022 $ 136 103,113 665,410 (292,225) 100 476,534
Net (loss) income           16,836
Balance (in shares) at Oct. 31, 2022 13,696,904          
Balance at Oct. 31, 2022 $ 137 107,275 682,226 (297,421) 100 492,317
Balance (in shares) at Jul. 31, 2022 13,695,669          
Balance at Jul. 31, 2022 $ 137 106,391 679,097 (297,421) 100 488,304
Issuance of common stock (in shares) 1,235          
Issuance of common stock $ 0 64 0 0 0 64
Stock based compensation 0 820 0 0 0 820
Dividends on subsidiary preferred stock 0 0 (10) 0 0 (10)
Net (loss) income $ 0 0 3,139 0 0 3,139
Balance (in shares) at Oct. 31, 2022 13,696,904          
Balance at Oct. 31, 2022 $ 137 107,275 682,226 (297,421) 100 492,317
Balance (in shares) at Apr. 30, 2023 13,701,468          
Balance at Apr. 30, 2023 $ 137 109,929 685,802 (297,421) 100 498,547
Issuance of common stock (in shares) 2,921          
Issuance of common stock $ 0 78 0 0 0 78
Stock options exercised (in shares) 6,493          
Stock options exercised $ 0 (455) 0 0 0 (455)
Purchase of treasury shares 0 0 0 (68) 0 (68)
Stock based compensation 0 2,451 0 0 0 2,451
Dividends on subsidiary preferred stock 0 0 (10) 0 0 (10)
Net (loss) income $ 0 0 4,186 0 0 4,186
Balance (in shares) at Jul. 31, 2023 13,710,882          
Balance at Jul. 31, 2023 $ 137 112,003 689,978 (297,489) 100 504,729
Balance (in shares) at Apr. 30, 2023 13,701,468          
Balance at Apr. 30, 2023 $ 137 109,929 685,802 (297,421) 100 498,547
Net (loss) income           (23,277)
Balance (in shares) at Oct. 31, 2023 13,711,731          
Balance at Oct. 31, 2023 $ 137 111,356 662,505 (297,489) 100 476,609
Balance (in shares) at Jul. 31, 2023 13,710,882          
Balance at Jul. 31, 2023 $ 137 112,003 689,978 (297,489) 100 504,729
Issuance of common stock (in shares) 849          
Issuance of common stock $ 0 65 0 0 0 65
Dividends on subsidiary preferred stock 0 0 (10) 0 0 (10)
Net (loss) income 0 0 (27,463) 0 0 (27,463)
Stock based compensation $ 0 (712) 0 0 0 (712)
Balance (in shares) at Oct. 31, 2023 13,711,731          
Balance at Oct. 31, 2023 $ 137 $ 111,356 $ 662,505 $ (297,489) $ 100 $ 476,609