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Note 4 - Inventories - Components of Inventories (Details) - USD ($)
$ in Thousands
Jun. 30, 2021
Dec. 31, 2020
Finished goods $ 13,238 $ 10,749
Raw materials 5,875 8,098
Total inventories 19,113 18,847
Current portion 12,523 10,034
Long-term portion $ 6,590 $ 8,813