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Revenue from Contracts with Customers (Tables)
3 Months Ended
Jul. 31, 2022
Revenue from Contract with Customer [Abstract]  
Summary of disaggregation of revenue
The following tables represents disaggregated revenue for the three months ended July 31, 2022 and 2021:
Three Months Ended
July 31,
 20222021
Pharmacology services$12,756 $10,703 
Other TOS revenue948 526 
Personalized oncology services41 24 
Total oncology services revenue$13,745 $11,253