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STOCK-BASED COMPENSATION
 9 Months Ended
Dec. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [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 December 31,
 
Nine Months Ended December 31,
 
 
2018
 
2017
 
2018
 
2017
Cost of service revenue
 
$
680

 
$
455

 
$
1,775

 
$
1,319

Research and development
 
3,570

 
1,794

 
8,587

 
4,445

Sales and marketing
 
5,590

 
3,362

 
13,262

 
8,577

General and administrative
 
2,695

 
2,519

 
7,950

 
6,797

Total
 
$
12,535

 
$
8,130

 
$
31,574

 
$
21,138

 
 
 
Nine Months Ended December 31,
 
 
2018
 
2017
Stock options outstanding at the beginning of the period:
 
3,998

 
4,462

Options granted
 
222

 
427

Options exercised 
 
(641
)
 
(421
)
Options canceled and forfeited
 
(192
)
 
(176
)
Options outstanding at the end of the period:
 
3,387

 
4,292

Weighted-average fair value of grants during the period
 
$
8.27

 
$
5.30

Total intrinsic value of options exercised during the period
 
$
9,148

 
$
4,312

Weighted-average remaining recognition period at period-end (in years) 
 
2.53

 
2.14

 
 
 
 
 
Stock awards outstanding at the beginning of the period:
 
5,939

 
4,950

Stock awards granted
 
4,993

 
2,884

Stock awards vested 
 
(2,123
)
 
(1,615
)
Stock awards canceled and forfeited
 
(700
)
 
(447
)
Stock awards outstanding at the end of the period: 
 
8,109

 
5,772

Weighted-average fair value of grants during the period
 
$
20.05

 
$
13.89

Weighted-average remaining recognition period at period-end (in years) 
 
2.4

 
2.67

Total unrecognized compensation expense at period-end
 
$
112,970

 
$
64,625


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 December 31, 2018 was approximately $7.1 million. There were no stock repurchases under the 2017 Repurchase Plan during the nine months period ended December 31, 2018.