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Income Taxes - Summary of Income Tax Expense/(Benefit) from Operations (Details) - USD ($)
$ in Thousands
 12 Months Ended
Apr. 30, 2025
Apr. 30, 2024
Apr. 30, 2023
Current:      
Federal (a) $ 48 $ 5 $ (126)
State (b) 64 (79) (123)
Foreign 11 4 0
Total current 123 (70) (249)
Deferred:      
Deferred federal 0 0 0
Deferred state 0 0 0
Total deferred 0 0 0
Total income tax expense/(benefit) $ 123 $ (70) $ (249)