Leases (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Leases
Operating lease cost	$ 155	$ 500
Classification of operating leases
Operating lease right-of-use assets	1,792
Operating lease liability, current	582
Operating Lease, Liability, Noncurrent	1,464
Lease cost
Operating Lease, Cost	155	$ 500
Short-term Lease, Cost	49
Lease, Cost, Total	$ 204
Lease Term and Discount Rate
Weighted average remaining lease term	3 years 10 months 24 days
Weighted average discount rate	7.20%
Cash paid for amounts included in the measurement of lease liabilities
Cash flows from operating activities	$ 139
Minimum
Leases
Initial lease term	1 year
Maximum
Leases
Initial lease term	7 years