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Summary of Significant Accounting Policies - Other Assets (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Other Assets |  |
Other assets | $ 2,356 | $ 2,153
Held by service provider | 1,418 | 1,832
Letter of credit for security deposit | 478 | $ 321
Debt |  |
Deferred financing costs | 410 |
Line of Credit | New Credit Facility |  |
Debt |  |
Deferred financing costs | $ 460 |

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