Quarterly report pursuant to Section 13 or 15(d)

STOCK-BASED COMPENSATION

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STOCK-BASED COMPENSATION
 3 Months Ended
Mar. 31, 2023
Share-Based Payment Arrangement [Abstract]  
STOCK-BASED COMPENSATION STOCK-BASED COMPENSATION
The following table summarizes stock-based compensation expense for the periods shown:
Three Months Ended March 31,
2023 2022
Selling and marketing $ 184  $ 319 
General and administrative 2,458  3,149 
Research and development 2,211  3,400 
Stock-based compensation expense $ 4,853  $ 6,868 
Capitalized stock-based compensation $ 556  $ 1,101 
As of March 31, 2023, there was approximately $1.5 million and $45.2 million in unrecognized stock-based compensation expense related to stock options and restricted stock units that are expected to be recognized over a weighted-average expected vesting period of 1.0 year and 2.9 years, respectively. The Company granted 2.8 million restricted stock units during the three months ended March 31, 2023.