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STOCK-BASED COMPENSATION
 3 Months Ended
Jun. 30, 2019
Share-based Payment Arrangement [Abstract]  
STOCK-BASED COMPENSATION STOCK-BASED COMPENSATION
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


Stock Repurchases
In May 2017, the Company's board of directors authorized the Company to purchase up to $25.0 million of its common stock from time to time (the "2017 Repurchase Plan"). The 2017 Repurchase Plan expires when the maximum purchase amount is reached, or upon the earlier revocation or termination by the board of directors. The remaining amount available under the 2017 Repurchase Plan at June 30, 2019 was approximately $7.1 million. There were no stock repurchases under the 2017 Repurchase Plan during the three month period ended June 30, 2019.