Revenue from Contracts with Customers (Details) - USD ($) $ in Thousands	12 Months Ended
Apr. 30, 2024	Apr. 30, 2023
Disaggregation of Revenue [Line Items]
Oncology services revenue	$ 50,155	$ 53,870
Pharmacology services
Disaggregation of Revenue [Line Items]
Oncology services revenue	47,035	50,708
Other TOS revenue
Disaggregation of Revenue [Line Items]
Oncology services revenue	3,102	3,046
Personalized oncology services
Disaggregation of Revenue [Line Items]
Oncology services revenue	$ 18	$ 116

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