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Note 6 - Inventories - Inventories (Details) - USD ($)
$ in Thousands
Sep. 30, 2018
Dec. 31, 2017
Raw materials $ 1,632 $ 197
Finished goods 11,667 14,218
Total current inventories 13,299 14,415
Raw materials 1,931 2,682
Finished goods 6,335 6,026
Total long-term inventories $ 8,266 $ 8,708