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Revenue from Contracts with Customers (Details) - USD ($) $ in Thousands	3 Months Ended
	Jul. 31, 2025	Jul. 31, 2024
Disaggregation of Revenue [Line Items]
Total oncology revenue	$ 13,995	$ 14,061
Pharmacology services
Disaggregation of Revenue [Line Items]
Total oncology revenue	13,230	13,069
TOS data license revenue
Disaggregation of Revenue [Line Items]
Total oncology revenue	311	0
Other TOS revenue
Disaggregation of Revenue [Line Items]
Total oncology revenue	$ 454	$ 992

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