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Cash, Cash Equivalents and Restricted Cash (Details) - USD ($)
$ in Thousands
Jan. 31, 2023
Apr. 30, 2022
Jan. 31, 2022
Apr. 30, 2021
Cash and Cash Equivalents [Abstract]        
Cash and cash equivalents $ 13,047 $ 4,433    
Restricted cash 5,369 2,461    
Total cash, cash equivalents and restricted cash $ 18,416 $ 6,894 $ 5,502 $ 5,731