Net Loss per Share - Calculation of Basic and Diluted Net Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended
		Mar. 31, 2023	Mar. 31, 2022
Earnings Per Share [Abstract]
Net loss		$ (72,606)	$ (75,490)
Net loss attributable to Common Stockholders		$ (72,606)	$ (75,490)
Basic weighted average number of common shares and common share equivalents outstanding (in shares)	[1]	478,805,067	473,028,651
Diluted weighted average number of common shares and common share equivalents outstanding (in shares)	[1]	478,805,067	473,028,651
Net loss per share attributable to Common Stockholders—basic (in dollars per share)	[1]	$ (0.15)	$ (0.16)
Net loss per share attributable to Common Stockholders—diluted (in dollars per share)	[1]	$ (0.15)	$ (0.16)

[1] (1) Because the Company had a net loss during the three months ended March 31, 2023 and 2022, the Company's potentially dilutive securities, which include stock options, restricted stock, preferred stock, and warrants to purchase shares of common stock and preferred stock, have been excluded from the computation of diluted net loss per share, as the effect would be anti-dilutive.