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 STOCK-BASED COMPENSATION
We recorded stock-based compensation expense, including expense related to our employee stock purchase plan, as follows:
Three Months Ended September 30, Nine Months Ended September 30,
2023 2022 2023 2022
Stock-based compensation expense $ 4,319  $ 3,631  $ 12,318  $ 10,837 
Our stock-based compensation expense is included in selling, general and administrative expenses in the condensed consolidated statements of income. As of September 30, 2023, there was $39,632 of unrecognized compensation expense related to non-vested stock option awards that is expected to be recognized over a weighted-average period of 2.3 years.
Stock Option and Restricted Stock Units (“RSUs”) Grants
During the nine months ended September 30, 2023, we granted 140 common stock options to certain employees under our 2020 Stock Incentive Plan (“2020 Plan”), which have a contractual life of ten years and vest over a five-year period. We also granted awards of 66 RSUs to certain employees and directors under our 2020 Plan. We did not grant awards to individuals who were not either an employee or director of ours during the nine months ended September 30, 2023 and 2022.