Stockholders' Equity - Non-vested RSUs (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Weighted Average Grant Date Fair Value
Stock-based compensation	$ 764	$ 978	$ 2,927	$ 3,271
Restricted Stock Units
Number of Shares
Non-vested at beginning of period (in shares)			5,918,496
Vested (in shares)			(167,953)
Forfeited/Cancelled (in shares)			(994,399)
Non-vested at end of period (in shares)	4,756,144		4,756,144
Weighted Average Grant Date Fair Value
Non-vested at beginning of period (in dollars per share)			$ 1.08
Vested (in dollars per share)			0.82
Forfeited (in dollars per share)			1.22
Non-vested at end of period (in dollars per share)	$ 1.06		$ 1.06
Stock-based compensation	$ 300		$ 1,200
Unrecognized compensation expense	$ 3,860		$ 3,860
Weighted average remaining period for recognition of unrecognized compensation expense			2 years 8 months 4 days