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Accounts Receivable, Unbilled Services and Deferred Revenue - Summary of Accounts Receivable and Unbilled Services (Details) - USD ($) $ in Thousands | Oct. 31, 2023 | Jul. 31, 2023 | Apr. 30, 2023 | Jul. 31, 2022 | Apr. 30, 2022
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Receivables [Abstract] |  |  |  |  |
Accounts receivable | $ 4,780 |  | $ 3,843 |  |
Unbilled services | 4,002 |  | 4,993 |  |
Total accounts receivable and unbilled services | 8,782 |  | 8,836 |  |
Less allowances | (1,058) |  | (825) |  |
Total accounts receivable, net | $ 7,724 | $ 9,000 | $ 8,011 | $ 9,400 | $ 9,500

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