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Share-based Compensation
 6 Months Ended
Jun. 30, 2020
Share-based Payment Arrangement [Abstract]  
Share-based Compensation Share-based Compensation
The Company included the following amounts for share-based compensation awards in the unaudited condensed consolidated statements of operations (in thousands):
 Three Months Ended
June 30,		Six Months Ended
June 30,
  2020201920202019
Cost of revenues$759  $574  $987  $697  
Research and development1,510  957  1,802  1,132  
Sales and marketing816  818  1,279  1,032  
General and administrative1,343  1,296  1,913  1,841  
Total$4,428  $3,645  $5,981  $4,702  
Stock Options
The following table summarizes the Company’s stock option activity:
Outstanding — December 31, 20199,044,304  
Granted1,209,500  
Exercised(442,193) 
Canceled(314,967) 
Outstanding — June 30, 20209,496,644  
Exercisable — June 30, 20203,990,056  
At June 30, 2020, total unrecognized compensation expense related to stock options was $12.3 million, which is expected to be recognized over a weighted-average period of 2.75 years.
Restricted Stock Units
The following table summarizes the Company’s restricted stock unit (“RSU”) activity:
Non-vested — December 31, 2019400,315  
Granted315,137  
Vested(465,269) 
Forfeited(1,250) 
Non-vested — June 30, 2020248,933  
At June 30, 2020, total unrecognized compensation expense related to RSUs was $0.6 million, which is expected to be recognized over a weighted-average period of 1.18 years.