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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($)
 12 Months Ended
Apr. 30, 2024
Apr. 30, 2023
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME    
Net Income (Loss) $ 6,690,000 $ 21,790,000
Other comprehensive income, net of tax:    
Pension settlement expense   7,597,000
Income tax effect   (2,354,000)
Pension settlement expense, net of tax   5,243,000
Decrease in pension liability 138,000 615,000
Income tax effect (78,000) (115,000)
Decrease in pension liability, net of tax 60,000 500,000
Other comprehensive income 60,000 5,743,000
Total comprehensive income $ 6,750,000 $ 27,533,000