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Note 7 - Inventories - Summary of Inventories (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Raw materials $ 13,688 $ 11,296
Work-in-process 4,626 6,062
Finished goods 6,819 4,677
Total 25,133 22,035
Inventories, net 21,300 22,035
Inventory, Noncurrent, Total $ 3,833