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				6 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022
Earnings Per Share [Abstract]
Net loss - basic and diluted	$ (22,925)	$ (16,498)	$ (19,471)	$ (18,019)	$ (39,423)	$ (37,490)
Shares used in calculating net loss per common share - basic (in shares)	238,311,498		215,862,977		231,952,888	210,806,330
Shares used in calculating net loss per common share - diluted (in shares)	238,311,498		215,862,977		231,952,888	210,806,330
Net loss per share of common stock - basic (in USD per share)	$ (0.10)		$ (0.09)		$ (0.17)	$ (0.18)
Net loss per share of common stock - diluted (in USD per share)	$ (0.10)		$ (0.09)		$ (0.17)	$ (0.18)