Quarterly report pursuant to Section 13 or 15(d)

STOCK-BASED COMPENSATION

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STOCK-BASED COMPENSATION
 9 Months Ended
Sep. 30, 2023
Share-Based Payment Arrangement [Abstract]  
STOCK-BASED COMPENSATION
NOTE 19—STOCK-BASED COMPENSATION
The following table summarizes stock-based compensation expense for the periods shown:
Three Months Ended September 30, Nine Months Ended September 30,
2023 2022 2023 2022
Selling and marketing $ 205  $ 165  $ 585  $ 646 
General and administrative 1,975  1,767  7,086  6,319 
Research and development 2,164  1,622  6,720  6,598 
Stock-based compensation expense $ 4,344  $ 3,554  $ 14,391  $ 13,563 
Capitalized stock-based compensation $ 412  $ 430  $ 1,340  $ 1,966 
As of September 30, 2023, there was approximately $0.5 million and $39.3 million in unrecognized stock-based compensation expense related to stock options and restricted stock units, respectively, that are expected to be recognized over a weighted-average expected vesting period of 0.9 years and 2.7 years, respectively. During the three months ended September 30, 2023 and 2022, the Company granted 0.4 million and 1.8 million restricted stock units, respectively, and during the nine months ended September 30, 2023 and 2022, the Company granted 4.4 million and 10.3 million restricted stock units, respectively.