SHARE-BASED COMPENSATION (Tables)

6 Months Ended

Sep. 30, 2021

Share-based Payment Arrangement [Abstract]

Summary of Share-Based Compensation Expense

The following is a summary of share-based compensation expense including restricted stock units and performance-based restricted stock units granted pursuant to the Company's Amended 2007 Plan, the 2019 Plan, and the 2019 Amended Plan and employee stock purchases made under the Company's 2011 Employee Stock Purchase Plan, as amended, (ESPP), based on estimated fair values within the applicable cost and expense lines identified below (in thousands):

	Three Months Ended				Six Months Ended
	September 30,				September 30,
	2021		2020		2021		2020
Cost of product revenue	$	321	$	344	$	595	$	589
Cost of service revenue	1,907		1,810		3,520		3,160
Research and development	4,902		4,935		8,993		8,716
Sales and marketing	5,842		5,357		10,656		9,349
General and administrative	3,763		3,290		6,936		6,018
	$	16,735	$	15,736	$	30,700	$	27,832