Leases (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Weighted Average Remaining Lease Term [Abstract]
Operating leases	4 years 2 months 12 days
Finance leases	10 years 1 month 6 days
Weighted Average Discount Rate [Abstract]
Operating leases	5.75%
Finance leases	5.04%
Operating Leases, Right-of-Use Assets and Lease Liabilities [Abstract]
Right-of-use asset	$ 1,846	$ 0
Operating lease liabilities	2,037
Operating lease liabilities, non-current	1,584	$ 0
Future Minimum Lease Commitments [Abstract]
2019 (excluding the three months ended March 31, 2019)	425
2020	564
2021	551
2022	395
2023	340
2024 and thereafter	28
Total lease payments	2,303
Less imputed interest	(266)
Total	2,037
Finance Lease Liabilities, Payments, Due [Abstract]
2019 (excluding the three months ended March 31, 2019)	1,504
2020	2,045
2021	2,096
2022	2,149
2023	2,203
2024 and thereafter	12,917
Total lease payments	22,914
Less imputed interest	(5,201)
Total	17,713
Lease, Cost [Abstract]
Operating lease cost	147
Finance lease cost [Abstract]
Amortization of right-of-use assets	267
Interest on lease liabilities	225
Total finance lease cost	492
Cash paid for amounts included in the measurement of lease liabilities: [Abstract]
Cash flows from operating activities - operating leases	138
Cash flows from operating activities - finance leases	492
Right-of-use assets obtained in exchange for lease obligations: [Abstract]
Operating leases	$ 127