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Income Taxes Other (Details) - USD ($) | 12 Months Ended
--- | ---
Apr. 30, 2023 | Apr. 30, 2022
Unrecognized tax benefits |  |
Federal net operating loss carryforwards | $ 7,001,000 |
State net operating loss carryforwards | 93,289,000 |
Foreign net operating loss carryforwards | 64,000 |
Unrecognized tax benefits which would impact the Company's effective tax rate if recognized | 5,076,000 |
Increase in valuation allowance | 2,337,000 | $ 7,387,000
Activity related to gross unrecognized tax benefits |  |
Beginning balance | 17,806,000 | 17,556,000
Increases related to prior year tax positions |  | 415,000
Decreases related to prior year tax positions | (379,000) | (239,000)
Increases related to current year tax positions | 1,257,000 | 1,398,000
Decreases related to lapsing of statute of limitations | (5,843,000) | (1,324,000)
Ending balance | 12,841,000 | 17,806,000
Accrued interest and penalties related to unrecognized tax positions | 282,000 | 302,000
Statute of limitations expiration |  |
Unrecognized tax benefits |  |
Unrecognized tax benefits which would impact the Company's effective tax rate if recognized | 12,841,000 | $ 17,806,000
Increase in valuation allowance | 5,986,000 |
Estimated decrease in unrecognized tax benefits in the next twelve months | $ (1,244,000) |

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