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Basic and Diluted Loss per Common Share (Tables)
3 Months Ended
Mar. 31, 2022
Earnings Per Share [Abstract]  
Summary of Securities Excluded From Calculation of Weighted Average Common Shares
The following outstanding securities, prior to the use of the treasury stock method or the if-converted method, have been excluded from the computation of diluted weighted-average shares outstanding for the respective periods below because they would have been antidilutive:

Three Months Ended March 31,
20222021
Stock options2,128,943 3,309,771 
Non-vested restricted stock units1,340,037 1,125,631