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Leases - Schedule of Lease Assets and Liabilities (Details) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Assets and Liabilities, Lessee |  |
Operating lease assets | $ 678 | $ 786
Finance lease assets | $ 101 | $ 6,781
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] | us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization | us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization
Total lease assets | $ 779 | $ 7,567
Operating lease liabilities current | 306 | 362
Finance lease liabilities current | 17 | 0
Current portion of finance lease obligation - related parties | 0 | 648
Operating lease liabilities non-current | 436 | 490
Finance lease liabilities non-current | 75 | 0
Present value of lease liabilities | $ 834 | $ 1,500

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