Net Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Numerator:
Net loss	$ (70,539)	$ (55,783)
Denominator:
Weighted-average number of common shares outstanding - basic (in shares)	38,077,660	33,651,127
Weighted-average number of common shares outstanding - diluted (in shares)	38,077,660	33,651,127
Net loss per share - basic (in usd per share)	$ (1.85)	$ (1.66)
Net loss per share - diluted (in usd per share)	$ (1.85)	$ (1.66)
Stock Options
Denominator:
Dilutive securities excluded (in shares)	4,146,000	3,259,000
Unvested Restricted Stock Units
Denominator:
Dilutive securities excluded (in shares)	0	14,000
Warrant
Denominator:
Dilutive securities excluded (in shares)	1,714,000	1,714,000