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Note 6 - Inventories - Inventories (Details) - USD ($)
$ in Thousands
Jun. 30, 2019
Dec. 31, 2018
Raw materials $ 482 $ 1,795
Finished goods 11,776 11,433
Total current inventory 12,258 13,228
Raw materials 2,039 2,165
Finished goods 5,676 6,788
Total long-term inventory $ 7,715 $ 8,953