Net Loss Per Share of Common Stock - Schedule of Earnings Per Share (Details) $ / shares in Units, $ in Thousands		1 Months Ended	12 Months Ended
	Oct. 04, 2018	Oct. 31, 2018	Dec. 31, 2018 USD ($) $ / shares shares	Dec. 31, 2017 USD ($) $ / shares shares
Earnings Per Share [Abstract]
Net loss | $			$ (17,453)	$ (23,039)
Weighted-average number of common shares used to compute basic and diluted net loss per share (in shares) | shares			7,950,284	3,467,096
Net loss per share, basic and diluted (in dollars per share) | $ / shares			$ (2.20)	$ (6.65)
Reverse stock split ratio	0.0556	0.0556