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Contract Liabilities - Summary of Revenue Recognized from Contract Liabilities (Detail) - USD ($)
$ in Thousands
12 Months Ended
Apr. 30, 2023
Apr. 30, 2022
Digital solutions services—non financial services income [Member]    
Statement [Line Items]    
Revenue recognized that was included in the contract liability balance at the beginning of the year $ 5,296 $ 5,019