Net Loss Per Share - Schedule of Basic and Diluted Net Loss per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Earnings Per Share [Abstract]
Net loss	$ (2,937)	$ (16,879)	$ (17,967)	$ (25,268)
Weighted-average number of shares outstanding used in computing net loss per share, basic and diluted	15,425,312	12,206,747	15,308,966	11,872,326
Net loss per share, basic and diluted	$ (0.19)	$ (1.38)	$ (1.17)	$ (2.13)