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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($)
 12 Months Ended
Apr. 30, 2025
Apr. 30, 2024
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME    
Net Income (Loss) $ 12,716,000 $ 6,690,000
Other comprehensive income, net of tax:    
Reclassification of the balance of accumulated other comprehensive loss to a benefit for income taxes (1,230,000)  
Decrease in pension liability   138,000
Income tax effect   (78,000)
Decrease in pension liability, net of tax   (60,000)
Other comprehensive income (loss) (1,230,000) 60,000
Total comprehensive income $ 11,486,000 $ 6,750,000