Leases - Schedule of Lease Assets and Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Assets and Liabilities, Lessee
Operating lease assets	$ 881	$ 965
Finance lease assets	$ 8,425	$ 9,302
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization
Total lease assets	$ 9,306	$ 10,267
Operating lease liabilities current	383	364
Finance lease liabilities current	1,312	3,440
Operating lease liabilities non-current	565	650
Finance lease liabilities non-current	0	648
Present value of lease liabilities	$ 2,260	$ 5,102