STOCK-BASED COMPENSATION (Tables)

3 Months Ended

Jun. 30, 2019

Share-based Payment Arrangement [Abstract]

Schedule of Stock Option Expense and Activity

The following tables summarize information pertaining to the stock-based compensation expense from stock options and stock awards (in thousands, except weighted-average grant-date fair value and recognition period):

	Three Months Ended June 30,
	2019		2018
Cost of service revenue	$	1,731	$	1,026
Research and development	3,864		2,194
Sales and marketing	3,921		2,398
General and administrative	4,081		3,293
Total	$	13,597	$	8,911

	Three Months Ended June 30,
	2019			2018
Stock options outstanding at the beginning of the period:	3,114			3,998
Options granted	—			81
Options exercised	(124		)	(115		)
Options canceled and forfeited	(16		)	(73		)
Options outstanding at the end of the period:	2,974			3,891
Weighted-average fair value of grants during the period	$	—		$	8.57
Total intrinsic value of options exercised during the period	$	1,402		$	1,186
Weighted-average remaining recognition period at period-end (in years)	2.46			2.35
Stock awards outstanding at the beginning of the period:	7,820			5,939
Stock awards granted	1,147			948
Stock awards vested	(329		)	(299		)
Stock awards canceled and forfeited	(445		)	(168		)
Stock awards outstanding at the end of the period:	8,193			6,420
Weighted-average fair value of grants during the period	$	22.40		$	22.20
Weighted-average remaining recognition period at period-end (in years)	2.11			2.40
Total unrecognized compensation expense at period-end	$	109,422		$	67,025