Revenue from Contracts with Customers (Tables)

6 Months Ended

Oct. 31, 2018

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

The following tables represents disaggregated revenue for the three and six months ended October 31, 2018 and 2017:

	Three Months Ended October 31,				Six Months Ended October 31,
	2018		2017		2018		2017
Pharmacology services	$	6,236	$	4,673	$	12,013	$	9,154
Personalized oncology services	249		378		609		818
Other	208		152		297		265
Total Oncology services revenue	$	6,693	$	5,203	$	12,919	$	10,237