Loss Per Share - Schedule of basic and diluted loss per share (Details) - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019
Earnings Per Share [Abstract]
Net loss		$ (132,670)	$ (98,895)
Weighted average shares outstanding
Basic (in shares)	[1]	34,833,211	301,559
Diluted (in shares)	[1]	34,833,211	301,559
Basic loss per common share (in dollars per share)		$ (3.81)	$ (327.95)
Diluted loss per common share (in dollars per share)		$ (3.81)	$ (327.95)

[1] Retroactively restated for the reverse recapitalization. Refer to Note 2 - Summary of Significant Accounting Policies and Note 16 - Loss Per Share for further information.