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Stockholders' Equity and Stock-Based Compensation (Tables)
 3 Months Ended
Mar. 31, 2020
Equity [Abstract]  
Summary of Restricted Stock Awards And Units
Restricted stock award (RSA) and restricted stock unit (RSU) activity under our equity incentive plan was as follows (in thousands, except weighted average grant date fair values):
 
 
 
Number of Restricted Stock Awards
 
Weighted-Average Grant Date Fair Value
RSAs at December 31, 2019
 
459

 
$
20.49

 
Awards granted
 
—

 
—

 
Awards vested
 
—

 
—

 
Awards forfeited and modified
 
—

 
—

RSAs at March 31, 2020
 
459

 
$
20.49


 
 
 
Number of Restricted Stock Units
 
Weighted-Average Grant Date Fair Value
RSUs at December 31, 2019
 
2,407

 
$
19.47

 
Awards granted
 
10

 
18.68

 
Awards vested
 
(2
)
 
19.46

 
Awards forfeited & modified
 
(13
)
 
22.18

RSUs at March 31, 2020
 
2,402

 
$
19.45
Summary of Stock Option Activity
The following table summarizes the Company’s stock option activity during the three months ended March 31, 2020 (in thousands, except weighted average exercise prices):
 
Number of Options
 
Weighted Average Exercise Price
 
Weighted Average Remaining Contractual Term (Years)
 
Aggregate Intrinsic Value
Outstanding, December 31, 2019
4,239

 
$1.54
 
6.1
 
$79,443
Options exercised
(373
)
 
$1.50
 
 
 
 
Options canceled
(7
)
 
$1.07
 
 
 
 
Outstanding, March 31, 2020
3,859

 
$1.55
 
6.0
 
$34,519
Options exercisable at March 31, 2020
2,864

 
$1.03
 
5.6
 
$27,076
Options vested as of March 31, 2020 and expected to vest after March 31, 2020
3,859

 
$1.55
 
6.0
 
$34,519
Schedule of Stock-based Compensation Expense
Total stock-based compensation expense was included in our consolidated statements of operations as follows (in thousands):
 
Three Months Ended March 31,
 
2020
 
2019
Cost of revenues
$
345

 
$
209

Research and development
1,782

 
558

Sales, general and administrative
1,636

 
1,142

 
$
3,763

 
$
1,909
Share-based Payment Arrangement, Nonvested Award, Cost
As of March 31, 2020, total unrecognized stock-based compensation related to unvested stock awards was $42.9 million, which will be recognized over the next five years as follows (in thousands):
Remainder of 2020
$
12,767

2021
13,415

2022
10,927

2023
5,742

2024
3

 
$
42,854