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STOCKHOLDERS' DEFICIT
 9 Months Ended
Sep. 30, 2023
Equity [Abstract]  
STOCKHOLDERS' DEFICIT
9. STOCKHOLDERS' DEFICIT
Stock-Based Compensation
Stock-based compensation expense relates primarily to expense for restricted stock awards (“RSAs”), restricted stock units (“RSUs”), and stock options. As of September 30, 2023, we had unvested or unexercised stock-based awards outstanding representing approximately 60.7 million shares of our common stock, consisting of approximately 38.6 million RSAs and RSUs with a weighted
average per share fair value of $2.74, and options to purchase approximately 22.0 million shares of our common stock with a weighted average exercise price of $8.81.
During the three and nine months ended September 30, 2023, the Company did not grant any stock options, RSUs or RSAs.
During the three and nine months ended September 30, 2023, nil and 1.9 million stock options were cancelled, respectively, and 1.3 million and 6.6 million RSAs and RSUs were forfeited, respectively.
Stock-based compensation expense for the three and nine months ended September 30, 2023 and 2022, is included in the Company’s Consolidated Statements of Operations as follows (in thousands):

Three Months Ended September 30,Nine Months Ended September 30,
2023202220232022
Cost of revenue$1,503 $4,366 $3,607 $23,287 
Research and development334 5,210 1,144 20,269 
Sales and marketing517 (720)1,561 8,870 
General and administrative1,2
12,507 20,897 35,102 114,122 
Total stock-based compensation expense1,2
$14,861 $29,753 $41,414 $166,548 
1 Includes $(0.1) million and $0.6 million that was recorded as an adjustment to accrued expenses and other within total current liabilities during the three and nine months ended September 30, 2022, respectively.
2 Includes $1.0 million of stock-based compensation that were provided in severance as part of restructuring charges incurred during the three and nine months ended September 30, 2022.
As of September 30, 2023, total unrecognized stock-based compensation expense related to unvested stock options was approximately $62.6 million, which is expected to be recognized over a weighted average time period of 2.3 years. As of September 30, 2023, the Company had approximately $50.8 million of unrecognized stock-based compensation expense related to RSAs and RSUs, which is expected to be recognized over a weighted average time period of 2.3 years, and an additional $13.1 million of unrecognized stock-based compensation expense related to RSUs for which some or all of the requisite service had been provided under the service conditions but had performance conditions that had not yet been achieved