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Basic and Diluted Net Loss per Common Share
 3 Months Ended
Mar. 31, 2022
Earnings Per Share [Abstract]  
Basic and Diluted Net Loss per Common Share Basic and Diluted Net Loss per Common Share
The following table provides a reconciliation of the numerator and denominator used in computing basic and diluted net loss attributable to common stockholders per common share:
 Three Months Ended March 31,
(in thousands, except per share amounts) 20222021
Numerator:  
Net loss attributable to common stockholders$(85,260)$(65,664)
Denominator:
Weighted average common shares outstanding — basic and diluted288,481,741 264,369,317 
Dilutive common stock equivalents would include the dilutive effect of common stock options, convertible debt units, RSUs, and warrants for common stock equivalents. Potentially dilutive common stock equivalents were excluded from the diluted earnings per share denominator for all periods because of their anti-dilutive effect. Weighted average common shares outstanding includes outstanding pre-funded warrants with an exercise price of $0.01.
The table below presents potential shares of common stock that were excluded from the computation as they were anti-dilutive using the treasury stock method:
 As of March 31,
(in thousands) 20222021
Options to purchase common stock19,304 15,084 
Unvested restricted stock units10,351 7,466 
Convertible notes— 458 
Total number of potentially issuable shares29,655 23,008