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Stock-based Compensation (Tables)
12 Months Ended
Dec. 31, 2021
Share-based Payment Arrangement [Abstract]  
Stock option valuation assumptions used
The following table presents, on a weighted-average basis, the assumptions used in the Black Scholes option-pricing model to determine the grant-date fair value:
Year Ended December 31,
202120202019
Expected term in years6.06.15.9
Expected stock price volatility67.5 %46.7 %45.3 %
Risk-free interest rate1.1 %0.5 %2.1 %
Expected dividend yield— — — 
Stock option activity
The following table summarizes the Company’s stock option activity since December 31, 2020:
Number of
Options
Weighted-
Average
Exercise
Price
Weighted-
Average
Remaining
Contractual
Term (Years)
Aggregate
Intrinsic
Value (in thousands)
Outstanding as of December 31, 2020
3,170,321 $4.11 6.2$10,847 
Granted1,553,567 10.25 
Exercised677,569 4.03 
Cancelled96,376 7.07 
Outstanding as of December 31, 2021
3,949,943 $6.46 6.9$24,543 
Options exercisable as of December 31, 2021
2,079,867 $4.34 5.1$16,988 
Options vested and expected to vest as of December 31, 2021
3,949,943 $6.46 6.9$24,543 
Restricted stock units activity
The following table summarizes the activity related to the Company's restricted stock units:
Outstanding Restricted Stock UnitsWeighted-
Average
Grant Date Fair Value
Outstanding as of December 31, 2020
— $— 
Granted312,015 15.32 
Vested800 17.73 
Cancelled1,685 16.28 
Outstanding as of December 31, 2021
309,530 $15.30 
Classification of stock-based compensation
The following table below summarizes the classification of the Company’s stock-based compensation in the consolidated statements of operations:
Year Ended December 31,
202120202019
Cost of revenue$81 $23 $35 
Sales and marketing559 303 337 
Technology development707 230 307 
General and administrative1,492 290 402 
Total stock-based compensation$2,839 $846 $1,081