Revenue from Contracts with Customers (Tables)

3 Months Ended

Jul. 31, 2019

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

The following tables represents disaggregated revenue for the three months ended July 31, 2019 and 2018:

	Three Months Ended July 31,
	2019		2018
Pharmacology services	$	6,530	$	5,777
Personalized oncology services	180		359
Other	27		89
Total oncology services revenue	$	6,737	$	6,225