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Stock-based Awards (Tables)
 12 Months Ended
Dec. 31, 2022
Share-based Payment Arrangement [Abstract]  
Summary of stock option activity
A summary of the Company’s stock option activity for the year ended December 31, 2022 is as follows:
 Number of OptionsWeighted-Average Exercise PriceWeighted-Average Remaining Contractual Life
Aggregate Intrinsic Value (1)
  (in years)(in millions)
Outstanding at December 31, 20216,078,180 $9.24 6.2 
Granted— —   
Exercised(66,904)2.68   
Forfeited/expired(896,786)8.16   
Outstanding at December 31, 20225,114,490 $9.50 4.7$0.1 
Vested and expected to vest at December 31, 20225,114,490 $9.50 4.7$0.1 
Exercisable at December 31, 2022
4,290,935 $10.52 4.1$— 
(1)The aggregate intrinsic value represents the excess of the closing price of the Company’s common stock of $2.51 on December 31, 2022 over the exercise price of in-the-money stock option awards.
Schedule of activity in connection with the restricted stock units A summary of the Company’s restricted stock unit (“RSU”) activity for the year ended December 31, 2022 is as follows:
 Number of SharesWeighted-Average Grant Date Fair Value
Non-vested — December 31, 2021
7,536,114 $4.60 
Granted7,436,267 3.80 
Vested(3,033,474)4.56 
Forfeited(1,931,038)4.46 
Non-vested — December 31, 2022
10,007,869 $4.04 
Schedule of fair value of stock option awards The fair value of each stock option award was estimated at the date of grant using a Black-Scholes option-pricing model with the following weighted-average assumptions for grants in 2021 and 2020:
 Year Ended December 31,
 20212020
Risk-free interest rate0.95 %0.52 %
Expected term (years)6.056.02
Expected volatility65 %65 %
Dividend yield— — 
Schedule of stock-based compensation cost relating to stock options, restricted stock awards and RSUs The Company recorded stock-based compensation cost relating to stock options and RSUs in the following categories on the accompanying consolidated statements of comprehensive income (loss) (in thousands):
 Year Ended December 31,
 202220212020
Cost of revenue$185 $227 $556 
Sales and marketing4,884 6,958 8,258 
Technology and development4,186 4,489 4,966 
General and administrative8,426 8,721 9,297 
Total stock-based compensation expense17,681 20,395 23,077 
Amount capitalized to internal-use software1,019 1,296 1,322 
Total stock-based compensation cost$18,700 $21,691 $24,399