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Schedule of Significant Changes in Contract Liabilities (Details) - USD ($)
$ in Thousands
 12 Months Ended
Apr. 30, 2023
Apr. 30, 2022
Account Receivable Contract Assets And Contract Liabilities    
Revenue recognized that was included in the contract liabilities balance as of the beginning of the period $ (574)
Contract liabilities obtained in acquisition of MAR (203)
Payments collected for which revenue has not been recognized 1,823 129
Net change in contract liabilities $ 1,249 $ (74)