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Fixed Assets - Leases (Details) - USD ($) $ in Thousands | 1 Months Ended | 3 Months Ended
--- | --- | ---
Oct. 31, 2023 | Jun. 30, 2023 | Mar. 31, 2024 | Mar. 31, 2023
Leases |  |  |  |
Increase (decrease) in operating lease right of use asset |  | $ 34 |  |
Restoration expense |  |  | $ 0 | $ 2
Operating lease cost |  |  | 24 | $ 48
CHINA |  |  |  |
Leases |  |  |  |
Renewal option term |  | 13 months |  |
Short term monthly rent expense |  | $ 3 |  |
Seattle and Tulsa |  |  |  |
Leases |  |  |  |
Monthly rent expense |  |  | $ 10 |
Short term monthly rent expense | $ 2 |  |  |
Agreement expiration term (in years) | 12 months |  |  |
Annual rent expense, increase (in percent) |  |  | 2.00% |
Minimum | Seattle and Tulsa |  |  |  |
Leases |  |  |  |
Remaining term (in years) | 12 months |  |  |
Maximum | Seattle and Tulsa |  |  |  |
Leases |  |  |  |
Remaining term (in years) | 4 years |  |  |

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