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Inventories - Inventories (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Current: |  |
Raw materials | $ 1,182 | $ 847
Finished goods | 9,281 | 10,594
Total | 10,463 | 11,441
Long-term: |  |
Raw materials | 1,977 | 1,915
Finished goods | 2,613 | 4,369
Total | $ 4,590 | $ 6,284

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