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Basic and Diluted Net Loss per Common Share
 6 Months Ended
Jun. 30, 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 June 30,Six Months Ended June 30,
(in thousands, except per share amounts) 2022202120222021
Numerator:  
Net loss attributable to common stockholders$(62,157)$(51,225)$(147,417)$(116,889)
Denominator:
Weighted average common shares outstanding — basic and diluted291,970,562 266,398,516 288,646,587 265,384,865 
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 June 30,
(in thousands) 20222021
Options to purchase common stock19,283 14,962 
Unvested restricted stock units10,166 7,412 
Convertible notes— 458 
Total number of potentially issuable shares29,449 22,832