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Note 7 - Federal, State and Local Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($)
$ in Thousands
Apr. 30, 2025
Apr. 30, 2024
Unrealized gain on securities held for sale $ (242) $ (178)
Total federal tax liability 13,195 12,893
Unrealized gain on securities held for sale 242 178
Domestic Tax Jurisdiction [Member]    
Deferred gain on deconsolidation of EAM 10,669 10,669
Deferred non-cash post-employment compensation (372) (372)
Depreciation and amortization 78 73
Unrealized gain on securities held for sale 1,127 916
Right of Use Asset (114) (128)
Deferred charges (129) (138)
Other (487) (424)
Total federal tax liability 10,772 10,596
Unrealized gain on securities held for sale (1,127) (916)
State and Local Jurisdiction [Member]    
Deferred gain on deconsolidation of EAM 2,287 2,073
Deferred non-cash post-employment compensation (80) (72)
Depreciation and amortization 16 13
Other (42) 105
Total federal tax liability $ 2,423 $ 2,297