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Operating Leases - Balance Sheet Presentation (Details) - USD ($) $ in Thousands | Sep. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Balance Sheet Captions |  |
Right-of-use assets | $ 653 | $ 906
Operating lease liabilities, current | 359 | 354
Operating lease liabilities | 710 | 977
Other assets |  |
Balance Sheet Captions |  |
Right-of-use assets | 653 | 906
Accrued liabilities |  |
Balance Sheet Captions |  |
Operating lease liabilities, current | 359 | 353
Other long-term liabilities |  |
Balance Sheet Captions |  |
Operating lease liabilities, noncurrent | $ 351 | $ 624

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