STOCK-BASED COMPENSATION

6 Months Ended

Sep. 30, 2020

Share-based Payment Arrangement [Abstract]

The following tables summarize information pertaining to the stock-based compensation expense (in thousands):


	Three Months Ended September 30,				Six Months Ended September 30,
	2020		2019		2020		2019
Cost of service revenue	$	2,410	$	1,182	$	4,224	$	2,179
Cost of other revenue	1,113		757		1,900		1,491
Research and development	8,255		4,217		14,800		8,081
Sales and marketing	7,054		5,340		12,793		9,261
General and administrative	6,490		5,895		14,384		9,976
Total	$	25,322	$	17,391	$	48,101	$	30,988

Restricted Stock Units (RSU) and Performance Stock Units (PSU)

Activities related to RSU and PSU, collectively Stock Awards, during six months ended September 30, 2020 and 2019 are summarized as follows (in thousands, except weighted-average grant-date fair value and recognition period):


	Six Months Ended September 30,
	2020		2019
Stock awards outstanding at the beginning of the period:	9,191		7,820
Stock awards granted	5,343		5,123
Stock awards vested	(2,498)		(1,945)
Stock awards canceled and forfeited	(564)		(663)
Stock awards outstanding at the end of the period:	11,472		10,335
Weighted-average fair value of grants during the period	$	15.75	$	22.35
Weighted-average remaining recognition period (in years)	1.96		2.28
Total unrecognized compensation expense at period-end	$	144,066	$	127,540

Stock Options

Activities related to Stock Options, during six months ended September 30, 2020 and 2019 are summarized as follows (in thousands, except weighted-average grant-date fair value and recognition period):


	Six Months Ended September 30,
	2020		2019
Stock options outstanding at the beginning of the period:	2,274		3,114
Options granted	—		—
Options exercised	(36)		(287)
Options canceled and forfeited	(28)		(39)
Options outstanding at the end of the period:	2,210		2,788
Weighted-average fair value of grants during the period	$	—	$	—
Total intrinsic value of options exercised during the period	$	302	$	3,726
Weighted-average remaining recognition period (in years)	1.54		2.32
Total unrecognized compensation expense at period-end	$	671	$	1,268

Employee Stock Purchase Plan (ESPP)

In July 2020, 329,430 shares were purchased and issued under the ESPP. As of September 30, 2020, there was a total of $2.9 million of unrecognized compensation, net of estimated forfeitures, which will be amortized on a straight line basis over the remaining weighted-average vesting period of 0.57 years. As of September 30, 2020, a total of 3,252,882 shares were available for issuance under the ESPP.

Stock Repurchases

In May 2017, the Company's board of directors authorized the 2017 Repurchase Plan under which the Company could purchase up to $25.0 million of its common stock. The remaining amount available at September 30, 2020 was approximately $7.1 million. There were no stock repurchases during the three and six months ended September 30, 2020 and 2019.