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Stock-Based Compensation (Tables)
 6 Months Ended
Jun. 30, 2022
Share-Based Payment Arrangement [Abstract]  
Summary of Stock Option Activity
A summary of the Company’s stock option activity under the SI Plan is as follows:
Number of
Options		Weighted
Average
Exercise
Price		Weighted
Average
Remaining
Contractual Life (Years)		Aggregate
Intrinsic
Value
Outstanding as of December 31, 2021
— 
Granted4,347,492 5.15 
Exercised— 
Cancelled/forfeited(84,427)5.32 
Outstanding as of June 30, 2022
4,263,065 $5.15 9.55$— 
A summary of the Company’s stock option activity under the EI Plan is as follows:
Number of
Options		Weighted
Average
Exercise
Price		Weighted
Average
Remaining
Contractual Life (Years)		Aggregate
Intrinsic
Value
Outstanding as of December 31, 2021
31,962,921 $2.81 7.77$86,075 
Granted— 
Exercised(477,001)2.49 950 
Cancelled/forfeited(3,274,099)2.48 
Outstanding as of June 30, 2022
28,211,821 $2.80 7.08$3,101 
A summary of the Company’s stock option activity under the STI Plan is as follows:
Number of
Options		Weighted
Average
Exercise
Price		Weighted
Average
Remaining
Contractual Life (Years)		Aggregate
Intrinsic
Value
Outstanding as of December 31, 2021
9,526,727 $5.55 8.0$13,905 
Granted— 
Exercised(485,735)2.41 1,678 
Cancelled/forfeited(785,520)8.05 
Outstanding as of June 30, 2022
8,255,472 $5.71 8.14$432 
Summary of Weighted-Average Assumptions
The weighted-average assumptions used in the Black-Scholes option pricing model for awards granted during the three months ended June 30, 2022 are as follows:
Risk-free interest rate:1.61 %
Expected term (in years):7.01
Expected volatility:43.50 %
Dividend yield:0.00 %
Schedule of Stock-Based Compensation Expense
The following table presents stock-based compensation expense included in each respective expense category in the unaudited Condensed Consolidated Statements of Operations and Other Comprehensive Loss:
Three Months Ended June 30,Six Months Ended June 30,
2022202120222021
Research and development$3,078 $1,070 $4,701 $1,661 
Sales and marketing251 306 625 505 
General and administrative(202)(428)1,148 1,302 
$3,127 $948 $6,474 $3,468