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Prepaid Expenses and Other Current Assets - Schedule of Prepaid Expenses and Other Current Assets (Details) - USD ($)
$ in Thousands
Apr. 30, 2024
Apr. 30, 2023
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]    
Prepaid preclinical and clinical activities $ 1,585 $ 1,724
Other prepaid expenses 2,833 2,583
Interest and other receivables 1,409 654
VAT receivable 1,023 1,422
Total prepaid expenses and other current assets $ 6,850 $ 6,383