STOCK-BASED COMPENSATION (Tables)

6 Months Ended

Sep. 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 September 30,				Six Months Ended September 30,
	2019		2018		2019		2018
Cost of service revenue	$	1,939	$	1,379	$	3,670	$	2,405
Research and development	4,217		2,823		8,081		5,017
Sales and marketing	5,340		2,206		9,261		4,604
General and administrative	5,895		3,721		9,976		7,014
Total	$	17,391	$	10,129	$	30,988	$	19,040

	Six Months Ended September 30,
	2019			2018
Stock options outstanding at the beginning of the period:	3,114			3,998
Options granted	—			195
Options exercised	(287		)	(574		)
Options canceled and forfeited	(39		)	(97		)
Options outstanding at the end of the period:	2,788			3,522
Weighted-average fair value of grants during the period	$	—		$	8.47
Total intrinsic value of options exercised during the period	$	3,726		$	8,525
Weighted-average remaining recognition period at period-end (in years)	2.32			2.52
Stock awards outstanding at the beginning of the period:	7,820			5,939
Stock awards granted	5,123			2,112
Stock awards vested	(1,945		)	(1,720		)
Stock awards canceled and forfeited	(663		)	(433		)
Stock awards outstanding at the end of the period:	10,335			5,898
Weighted-average fair value of grants during the period	$	22.35		$	22.01
Weighted-average remaining recognition period at period-end (in years)	2.28			2.44
Total unrecognized compensation expense at period-end	$	129,136		$	79,121