Net Loss Per Share - Schedule of Basic and Diluted Net Loss Per Share Attributable to Common Stockholders (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Earnings Per Share [Abstract]
Net loss attributable to common stockholders	$ (14,779)	$ (14,778)	$ (27,720)	$ (21,560)
Weighted-average common shares used in computing net loss per share attributable to common stockholders, basic and diluted	5,208,887	2,149,986	3,190,557	2,133,645
Net loss per share attributable to common stockholders, basic and diluted	$ (2.84)	$ (6.87)	$ (8.69)	$ (10.10)