Stock-Based Compensation (Details 2) - Stock Options - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Number of shares outstanding, beginning (in thousands)	816	803
Number of shares granted (in thousands)	2,394	90
Number of shares exercised (in thousands)	(147)	0
Number of shares forfeited (in thousands)	(434)	(77)
Number of shares outstanding, ending (in thousands)	2,629	816
Weighted average exercise price per share outstanding, beginning	$ 1.77	$ 2.89
Weighted average exercise price per share granted	1.56	0.94
Weighted average exercise price per share exercised	1.30	0.00
Weighted average exercise price per share forfeited	1.58	1.97
Weighted average exercise price per share outstanding, ending	1.64	$ 1.77
Weighted average exercise price per share exercisable	$ 1.74
Weighted average remaining contractual term outstanding	8 years 9 months 15 days	7 years 5 months 26 days
Weighted average remaining contractual term exercisable	6 years 9 months 7 days
Aggregate intrinsic value outstanding, beginning	$ 16	$ 54
Aggregate intrinsic value exercised	116
Aggregate intrinsic value outstanding, ending	1,605	$ 16
Aggregate intrinsic value exercisable	$ 468