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Fixed Assets and Operating Leases - Supplemental cash flow information (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020
Cash paid for amounts included in the measurement of lease liabilities: |  |
Operating cash flows from operating leases | $ 218 | $ 215
New operating lease liabilities | 320 |
Impairment of ROU assets | $ 63 |

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