Net Loss per Share - Reconciliation of Numerator and Denominator Used in Calculation of Basic and Diluted Net Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019
Earnings Per Share [Abstract]
Net loss	$ (4,763)	$ (4,497)	$ (3,686)	$ (5,818)	$ (3,790)	$ (2,581)	$ (12,946)	$ (12,189)
Net loss attributable to common stockholders	$ (4,763)			$ (5,818)			$ (12,946)	$ (12,189)
Weighted average number of shares of common stock	7,464,949			1,070,000			3,201,650	1,070,000
Basic and diluted net loss per share	$ (0.64)			$ (5.44)			$ (4.04)	$ (11.39)