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CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($)
Common Stock
Capital Contributed in Excess of Par Value
Retained Earnings
Accumulated Other Comprehensive Loss
Total
Balance at Apr. 30, 2021 $ 730,000 $ 45,072,000 $ 47,710,000 $ (4,623,000) $ 88,889,000
Balance (in shares) at Apr. 30, 2021 7,323        
Issuance of restricted common stock $ 1,000 149,000     150,000
Issuance of restricted common stock (in shares) 13        
Net income     4,963,000   4,963,000
Other comprehensive income       133,000 133,000
Balance at Oct. 31, 2021 $ 731,000 45,221,000 52,673,000 (4,490,000) 94,135,000
Balance (in shares) at Oct. 31, 2021 7,336        
Balance at Jul. 31, 2021 $ 731,000 45,221,000 49,347,000 (4,557,000) 90,742,000
Balance (in shares) at Jul. 31, 2021 7,336        
Net income     3,326,000   3,326,000
Other comprehensive income       67,000 67,000
Balance at Oct. 31, 2021 $ 731,000 45,221,000 52,673,000 (4,490,000) 94,135,000
Balance (in shares) at Oct. 31, 2021 7,336        
Balance at Apr. 30, 2022 $ 524,000 32,383,000 54,828,000 (4,573,000) 83,162,000
Balance (in shares) at Apr. 30, 2022 5,240        
Issuance of restricted common stock $ 2,000 162,000     164,000
Issuance of restricted common stock (in shares) 15        
Compensation related to issuance of option to purchase common stock   25,000     25,000
Net income     5,533,000   5,533,000
Other comprehensive income       143,000 143,000
Balance at Oct. 31, 2022 $ 526,000 32,570,000 60,361,000 (4,430,000) 89,027,000
Balance (in shares) at Oct. 31, 2022 5,255        
Balance at Jul. 31, 2022 $ 526,000 32,558,000 56,740,000 (4,507,000) 85,317,000
Balance (in shares) at Jul. 31, 2022 5,255        
Compensation related to issuance of option to purchase common stock   12,000     12,000
Net income     3,621,000   3,621,000
Other comprehensive income       77,000 77,000
Balance at Oct. 31, 2022 $ 526,000 $ 32,570,000 $ 60,361,000 $ (4,430,000) $ 89,027,000
Balance (in shares) at Oct. 31, 2022 5,255