Leases (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019	Dec. 31, 2018
Weighted Average Remaining Lease Term [Abstract]
Operating leases	3 years 8 months 12 days	3 years 8 months 12 days
Finance leases	9 years 7 months 6 days	9 years 7 months 6 days
Weighted Average Discount Rate [Abstract]
Operating leases	5.75%	5.75%
Finance leases	5.04%	5.04%
Operating Leases, Right-of-Use Assets and Lease Liabilities [Abstract]
Right-of-use asset	$ 2,089	$ 2,089	$ 0
Operating lease liabilities, non-current	1,709	1,709	$ 0
Future Minimum Lease Commitments [Abstract]
2019 (excluding the six months ended June 30, 2019)	169	169
2020	710	710
2021	714	714
2022	564	564
2023	368	368
2024 and thereafter	28	28
Total lease payments	2,553	2,553
Less imputed interest	(262)	(262)
Total	2,291	2,291
Finance Lease Liabilities, Payments, Due [Abstract]
2019 (excluding the six months ended June 30, 2019)	504	504
2020	2,045	2,045
2021	2,096	2,096
2022	2,149	2,149
2023	2,203	2,203
2024 and thereafter	12,917	12,917
Total lease payments	21,914	21,914
Less imputed interest	(4,761)	(4,761)
Total	17,153	17,153
Lease, Cost [Abstract]
Operating lease cost	160	454
Finance lease cost [Abstract]
Amortization of right-of-use assets	305	915
Interest on lease liabilities	219	666
Total finance lease cost	$ 524	1,581
Cash paid for amounts included in the measurement of lease liabilities: [Abstract]
Cash flows from operating activities - operating leases		435
Cash flows from operating activities - finance leases		1,491
Right-of-use assets obtained in exchange for lease obligations: [Abstract]
Operating leases		$ 378