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Revenue from Contracts with Customers (Tables)
 12 Months Ended
Apr. 30, 2023
Revenue from Contract with Customer [Abstract]  
Summary of Disaggregation of Revenue The following table represents disaggregated revenue for the twelve months ended April 30, 2023 and 2022:
Year Ended April 30,
 20232022
Pharmacology services$50,708 $46,833 
Other TOS revenue3,046 2,227 
Personalized oncology services116 49 
Total oncology services revenue$53,870 $49,109 
Other TOS revenue represents additional services provided to the Company's pharmaceutical and biotechnology customers, specifically flow cytometry services and SaaS provided via our Lumin Bioinformatics software.