Leases - Additional Information on Operating Leases (Details) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019 USD ($)	Sep. 30, 2019 USD ($)
Operating Lease Cost
Operating leases	$ 591	$ 1,849
Short-term lease	5	52
Total lease expense	$ 596	1,901
Cash payments included in operating cash flows		$ 1,625
Weighted average discount rate	9.33%	9.33%
Weighted average remaining lease term in years	5 years 6 months 10 days	5 years 6 months 10 days