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Note 6 - Inventories - Inventories (Details) - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Raw materials $ 530 $ 1,795
Finished goods 11,159 11,433
Total current inventory 11,689 13,228
Raw materials 1,953 2,165
Finished goods 5,190 6,788
Total long-term inventory $ 7,143 $ 8,953