Leases - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019	Jan. 01, 2019
Lessee, Lease, Description [Line Items]
Operating lease right-of-use asset	$ 2,656	$ 2,656	$ 1,900
Operating lease liability	2,830	$ 2,830	$ 2,000
Lease renewal term		5 years
Right-of-use assets obtained in exchange for operating lease liabilities		$ 1,000
Operating lease payments	$ 200	$ 300
Operating lease, weighted average remaining lease term	6 years 7 months 6 days	6 years 7 months 6 days
Finance lease, weighted average remaining lease term	5 years 2 months 12 days	5 years 2 months 12 days
Operating lease, weighted average discount rate	8.20%	8.20%
Finance lease, weighted average discount rate	8.00%	8.00%
Minimum
Lessee, Lease, Description [Line Items]
Remaining lease term		1 year
Weighted average discount rate	4.86%	4.86%
Maximum
Lessee, Lease, Description [Line Items]
Remaining lease term		10 years
Weighted average discount rate	8.60%	8.60%