SHARE-BASED COMPENSATION (Tables)

9 Months Ended

Dec. 31, 2017

Disclosure of Compensation Related Costs, Share-based Payments [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 (ESPP) based on estimated fair values within the applicable cost and expense lines identified below (in thousands):

	Three Months Ended				Nine Months Ended
	December 31,				December 31,
	2017		2016		2017		2016
Cost of product revenue	$	301	$	255	$	807	$	716
Cost of service revenue	1,287		1,015		3,597		3,058
Research and development	3,730		3,456		10,820		9,961
Sales and marketing	4,022		3,367		11,613		9,704
General and administrative	3,085		2,368		8,417		6,832
	$	12,425	$	10,461	$	35,254	$	30,271