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INCOME TAXES - Components of the net deferred income taxes (Details) - USD ($)
$ in Thousands
Apr. 30, 2025
Apr. 30, 2024
Deferred income tax assets:    
State tax loss carryforwards $ 2,701 $ 2,748
U.S. federal NOL carryforward 6,819 8,891
Vacation accrual 32 27
Real estate basis differences 2,419 2,444
Other 420 390
Total deferred income tax assets 12,391 14,500
Deferred income tax liabilities:    
Depreciable assets (40) (50)
Deferred gains on investment assets (2,401) (2,377)
Other (48) (46)
Total deferred income tax liabilities (2,489) (2,473)
Valuation allowance for realization of certain deferred income tax assets (933) (989)
Net deferred income tax asset $ 8,969 $ 11,038