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STOCK-BASED COMPENSATION (Tables)
6 Months Ended
Jun. 30, 2021
Equity [Abstract]  
Share-based Payment Arrangement, Option, Activity
Stock option activity as of June 30, 2021 is set forth below:
Number of
options
Weighted-
average
exercise
price
Weighted- average remaining contractual life (years)Aggregate intrinsic value
Options outstanding at January 1, 20218,365 $10.68 7.47$230,596 
Granted72 52.80 
Exercised(500)6.62 
Repurchased(220)4.81 
Forfeited and expired(51)13.12 
Options outstanding at June 30, 20217,666 $11.49 7.12$596,343 
Options exercisable at June 30, 20214,431 $7.21 6.09$363,687 
Share-based Payment Arrangement, Restricted Stock Unit, Activity
RSU activity for the six months ended June 30, 2021 is set forth below:
Share unitsWeighted-
average
grant date fair value per share
Outstanding at January 1, 202134 $38.08 
Granted561 52.58 
Vested— — 
Forfeited— — 
Outstanding at June 30, 2021
595 $51.76 
Disclosure of Share-based Compensation Arrangements by Share-based Payment Award
Stock based compensation expense is included in the consolidated statements of operations as shown in the following table:
Three Months Ended June 30,Six Months Ended June 30,
2021202020212020
Cost of Revenue$— $— $$
Research and development1,105 532 2,216 979 
Sales and marketing72 107 140 180 
General and administrative1,730 1,042 3,100 1,675 
Total$2,907 $1,681 $5,458 $2,835