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Basic and Diluted Loss per Common Share
 12 Months Ended
Dec. 31, 2022
Earnings Per Share [Abstract]  
Basic and Diluted Loss per Common Share
13. Basic and Diluted Loss per Common Share

The following table sets forth the computation of basic and diluted net loss per share for the years ended December 31, 2022, 2021, and 2020 (in thousands, except share and per share data):

Year Ended December 31,
202220212020
Numerator:
Net loss$(150,920)$(88,641)$(33,477)
Denominator:
Weighted average common shares outstanding, basic and diluted72,455,175 71,036,490 69,050,565 
Net loss per share, basic and diluted$(2.08)$(1.25)$(0.48)

Due to net losses for the years ended December 31, 2022, 2021, and 2020, basic and diluted net loss per share were the same as the effect of potentially dilutive securities would have been antidilutive.

The following outstanding securities, prior to the use of the treasury stock method, have been excluded from the computation of diluted weighted-average shares outstanding for the respective periods below because they would have been antidilutive to earnings per share:
Year Ended December 31,
202220212020
Stock options2,697,959 2,953,356 3,399,240 
Non-vested restricted stock units1,190,720 1,209,529 1,165,003