SHARE-BASED COMPENSATION (Tables)

6 Months Ended

Sep. 30, 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				Six Months Ended
	September 30,				September 30,
	2017		2016		2017		2016
Cost of product revenue	$	293	$	266	$	506	$	461
Cost of service revenue	1,294		1,245		2,310		2,043
Research and development	3,915		3,872		7,090		6,505
Sales and marketing	4,147		3,726		7,591		6,337
General and administrative	2,949		2,569		5,332		4,464
	$	12,598	$	11,678	$	22,829	$	19,810