SHARE-BASED COMPENSATION (Tables)

3 Months Ended

Jun. 30, 2019

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 granted pursuant to the Company's 2007 Equity Incentive Plan, as amended, 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
	June 30,
	2019		2018
Cost of product revenue	$	267	$	269
Cost of service revenue	1,467		1,330
Research and development	3,819		4,151
Sales and marketing	4,135		4,359
General and administrative	3,055		2,856
	$	12,743	$	12,965