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Operating Leases - Balance Sheet Presentation (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Balance Sheet |  |
Right-of-use assets | $ 906 |
Operating lease liabilities, current | 354 | $ 0
Operating lease liabilities | 977 |
Other assets |  |
Balance Sheet |  |
Right-of-use assets | 906 |
Accrued liabilities |  |
Balance Sheet |  |
Operating lease liabilities, current | 353 |
Other long-term liabilities |  |
Balance Sheet |  |
Operating lease liabilities, noncurrent | $ 624 |

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