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Stock-Based Compensation (Tables)
 6 Months Ended
Jun. 30, 2021
Share-based Payment Arrangement [Abstract]  
Share-based Payment Arrangement, Expensed and Capitalized, Amount
The following are the stock-based compensation expense incurred for the three and six months ended June 30, 2021 (in thousands). We recorded immaterial share-based compensation expense for the comparative periods ended June 30, 2020.

Three Months Ended June 30, 2021Six Months Ended June 30, 2021
Cost of sales - services$795 $1,532 
Sales and marketing2,233 3,780 
Research and development648 1,109 
General and administrative17,660 28,585 
Total$21,336 $35,006 
Non-Vested Restricted Stock
A summary of the awards of Service-Based RSUs that vest upon the completion of a service requirement are presented below:
Number of
Shares		Weighted-
Average Grant
Date Fair
Value
(per share)		Weighted-
Average
Contractual
Life (years)		Aggregate
Intrinsic
Value
(in thousands)
Unvested Balance - December 31, 202059,521 $0.18 2.4$2,000 
Granted2,731,963 36.52 — — 
Vested(119,800)36.17 — — 
Forfeited(74,776)36.63 — — 
Unvested Balance - June 30, 20212,596,908 $35.97 1.7$88,300 
A summary of the awards of Performance-Based RSUs that vest upon the attainment of certain price targets of the Company’s common stock are presented below:
Number of
Shares		Weighted-
Average Grant
Date Fair
Value
(per share)		Weighted-
Average
Contractual
Life (years)		Aggregate
Intrinsic
Value
(in thousands)
Unvested Balance - December 31, 2020— $— — $— 
Granted438,403 30.84 — — 
Vested— — — — 
Forfeited(16,176)30.84 — — 
Unvested Balance - June 30, 2021422,227 $30.84 2.6$14,400