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Income Taxes (Details) - Schedule of Effective Income Tax Rate Reconciliation - USD ($)
$ in Thousands
12 Months Ended
Apr. 30, 2021
Apr. 30, 2020
Schedule of Effective Income Tax Rate Reconciliation [Abstract]    
Statutory rate $ 100 $ (2,471)
State and local tax 69 (417)
Valuation allowance on deferred tax assets 961 2,009
Nondeductible expenses 2 (134)
Uncertain tax positions (898) 0
Nontaxable life insurance cash value increase (63) (73)
Taxable life insurance gain 128 0
Stock Compensation 242 0
Tax credits (434) (46)
Change in tax rate (323) (120)
Impact of CARES Act 0 (592)
Other items 12 102
Total (benefit) provision $ (204) $ (1,742)