Long-Term Debt - Summary of Expenses Related to Term Loan (Details) - USD ($) $ in Thousands	12 Months Ended
Apr. 30, 2025	Apr. 30, 2024
Debt Instrument [Line Items]
Interest expense paid-in-kind and applied to the Term Loan 2024 balance	$ 855	$ 1,098
Term Loan 2024
Debt Instrument [Line Items]
Cash interest expense	4,851	2,860
Amortization of the facility fee and legal fees	874	271
Interest expense paid-in-kind and applied to the Term Loan 2024 balance	855	540
Total expense recognized related to the Term Loan	7,106	4,109
Term Loan 2024 \| Warrant
Debt Instrument [Line Items]
Amortization of the debt discount recognized in connection with the warrant	$ 526	438
Term Loan
Debt Instrument [Line Items]
Cash interest expense		771
Amortization of the facility fee and legal fees		93
Interest expense paid-in-kind prior to the extinguishment of the Term Loan		1,141
Total expense recognized related to the Term Loan		2,061
Term Loan \| Warrant
Debt Instrument [Line Items]
Amortization of the debt discount recognized in connection with the warrant		$ 56

Amortization of facility fee and legal fees.

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