Leases - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Jan. 01, 2019
Lessee, Lease, Description [Line Items]
Operating lease right-of-use asset	$ 2,746	$ 2,800
Operating lease liability	$ 2,907	$ 3,000
Lease renewal term	5 years
Right-of-use assets obtained in exchange for operating lease liabilities	$ 1,000
Operating lease payments	$ 100
Operating lease, weighted average remaining lease term	6 years 9 months 18 days
Finance lease, weighted average remaining lease term	5 years 4 months 24 days
Operating lease, weighted average discount rate	8.18%
Finance lease, weighted average discount rate	7.97%
Minimum
Lessee, Lease, Description [Line Items]
Remaining lease term	1 year
Weighted average discount rate	4.86%
Maximum
Lessee, Lease, Description [Line Items]
Remaining lease term	10 years
Weighted average discount rate	8.60%