Revenue from Contracts with Customers (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Oct. 31, 2024	Oct. 31, 2023	Oct. 31, 2024	Oct. 31, 2023
Disaggregation of Revenue [Line Items]
Total oncology services revenue	$ 13,489	$ 11,573	$ 27,550	$ 24,134
Pharmacology services
Disaggregation of Revenue [Line Items]
Total oncology services revenue	12,498	10,876	25,567	22,735
Other TOS revenue
Disaggregation of Revenue [Line Items]
Total oncology services revenue	991	697	1,983	1,381
Personalized oncology services
Disaggregation of Revenue [Line Items]
Total oncology services revenue	$ 0	$ 0	$ 0	$ 18

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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+ Details