Revenue from Contracts with Customers (Tables)

9 Months Ended

Jan. 31, 2021

Revenue from Contract with Customer [Abstract]

Summary of disaggregation of revenue

The following tables represents disaggregated revenue for the three and nine months ended January 31, 2021 and 2020:

	Three Months Ended January 31,				Nine Months Ended January 31,
	2021		2020		2021		2020
Pharmacology services	$	10,745	$	8,843	$	30,199	$	22,732
Personalized oncology services	5		169		155		581
Other	62		—		122		62
Total oncology services revenue	$	10,812	$	9,012	$	30,476	$	23,375