Leases (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2020		Jun. 30, 2019		Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Weighted Average Remaining Lease Term [Abstract]
Operating leases	3 years				3 years
Finance leases	8 years 9 months 18 days				8 years 9 months 18 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	$ 1,777				$ 1,777		$ 1,979
Operating lease liabilities, non-current	1,274				1,274		$ 1,553
Future Minimum Lease Commitments [Abstract]
2020 (excluding the six months ended June 30, 2020)	371				371
2021	752				752
2022	592				592
2023	373				373
2024	27				27
After 2024	0				0
Total lease payments	2,115				2,115
Less imputed interest	(178)				(178)
Total	1,937				1,937
Finance Lease Liabilities, Payments, Due [Abstract]
2019 (excluding the six months ended June 30, 2019)	1,033				1,033
2021	2,097				2,097
2022	2,149				2,149
2023	2,203				2,203
2024	2,258				2,258
2024 and thereafter	10,658				10,658
Total lease payments	20,398				20,398
Less imputed interest	(4,127)				(4,127)
Total	16,271				16,271
Lease, Cost [Abstract]
Operating lease cost	182		$ 147		360	$ 294
Short-term lease cost	30	[1]	42	[1]	57	84
Amortization of finance lease assets	305		305		610	610
Interest on finance lease liabilities	208		222		419	447
Total finance lease cost	513		527		1,029	1,057
Total lease costs	$ 725		$ 716		1,446	1,435
Cash paid for amounts included in the measurement of lease liabilities: [Abstract]
Cash flows from operating activities - operating leases					375	279
Cash flows from operating activities - finance leases					1,012	987
Right-of-use assets obtained in exchange for lease obligations: [Abstract]
Operating lease right-of-use assets obtained in exchange for operating lease liabilities					$ 300	$ 245

[1] Leases that have terms of 12 months or less.