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Basic and Diluted Net Loss per Common Share (Tables)
 12 Months Ended
Dec. 31, 2022
Earnings Per Share [Abstract]  
Schedule of Reconciliation of the Numerator and Denominator Used in Computing 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:
Years Ended December 31,
(in thousands, except per share amounts)
202220212020
Numerator:
Net loss attributable to common stockholders$(236,568)$(250,460)$(276,852)
Denominator:
Weighted average common shares outstanding — basic and diluted289,057,198 271,421,986 258,867,380 
Schedule of Potential Shares of Common Stock that were Excluded from the Computation as they were Anti-Dilutive Using the Treasury Stock Method
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:
Years ended December 31,
(in thousands)202220212020
Options to purchase common stock19,064 14,731 14,032 
Unvested restricted stock units9,717 7,341 7,080 
Outstanding warrants, convertible to common stock— — 2,555 
Convertible notes— — 462 
Total number of potentially issuable shares28,781 22,072 24,129