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Accounts Receivable, Unbilled Services and Deferred Revenue - Schedule of Accounts Receivable, Unbilled Services, And Advanced Billings (Details) - USD ($) $ in Thousands	Jul. 31, 2025	Apr. 30, 2025	Apr. 30, 2024
Receivables [Abstract]
Accounts receivable	$ 5,139	$ 6,835	$ 4,886
Unbilled services	5,335	5,398	5,941
Total accounts receivable and unbilled services	10,474	12,233	10,827
Less: Allowances for doubtful accounts and estimated credit losses	(1,000)	(1,029)	(1,301)
Total accounts receivable, net	$ 9,474	$ 11,204	$ 9,526

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Amount, before allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business.

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