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Inventories - Inventories (Details) - USD ($) $ in Thousands | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Inventories |  |
Raw materials | $ 871 | $ 944
Work in process | 2,480 | 2,879
Finished goods | 578 | 353
Total inventories, net | 3,929 | 4,176
Less: noncurrent inventories | 1,451 | 2,194
Current inventories | $ 2,478 | $ 1,982

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