Net Loss Per Share of Common Stock - Computation of basic and diluted earnings per share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Earnings Per Share [Abstract]
Net loss - basic and diluted	$ (18,019)	$ (7,077)
Shares used in calculating net loss per common share - basic (in shares)	205,693,498	186,298,122
Shares used in calculating net loss per common share - diluted (in shares)	205,693,498	186,298,122
Net loss per share of common stock - diluted (in USD per share)	$ (0.09)	$ (0.04)
Net loss per common share - basic and diluted (in USD per share)	$ (0.09)	$ (0.04)