Net Loss Per Common Share - Computation of Basic and Diluted Net Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Numerator:
Net loss	$ (8,512)	$ (14,669)
Denominator:
Weighted-average common shares outstanding used to calculate net loss per common share, basic and diluted	18,782,287	17,317,042
Net loss per common share, basic and diluted	$ (0.45)	$ (0.85)