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Note 6 - Inventories - Inventories (Details) - USD ($)
$ in Thousands
Jun. 30, 2018
Dec. 31, 2017
Raw materials $ 2,580 $ 197
Finished goods 11,799 14,218
14,380 14,415
Raw materials 2,022 2,682
Finished goods 6,329 6,026
$ 8,351 $ 8,708