Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation

Stock-Based Compensation
3 Months Ended
Mar. 31, 2022
Share-based Payment Arrangement [Abstract]  
We recorded stock-based compensation expense, including expense related to our employee stock purchase plan, as follows:
Three Months Ended March 31,
2022 2021
Stock-based compensation expense $ 3,531  $ 766 
Our stock-based compensation expense is included in selling, general and administrative expenses in the condensed consolidated statements of income. As of March 31, 2022, there was $46,295 of unrecognized compensation expense related to non-vested stock option awards that is expected to be recognized over a weighted-average period of 4.0 years.
Stock Option Grants
During the three months ended March 31, 2022, we granted 313 common stock options to certain employees under our 2020 Stock Incentive Plan, which have a contractual life of ten years and vest over a five-year period. We did not grant awards to individuals who were not either an employee or director of ours during the three months ended March 31, 2022 and 2021.