Accounts Receivable, Unbilled Services and Deferred Revenue - Summary of Accounts Receivable and Unbilled Services (Details) - USD ($) $ in Thousands	Jan. 31, 2024	Oct. 31, 2023	Apr. 30, 2023	Oct. 31, 2022	Apr. 30, 2022
Receivables [Abstract]
Accounts receivable	$ 4,653		$ 3,843
Unbilled services	4,380		4,993
Total accounts receivable and unbilled services	9,033		8,836
Less: Allowances	(1,138)		(825)
Total accounts receivable, net	$ 7,895	$ 7,700	$ 8,011	$ 9,000	$ 9,500