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Note 8 - Inventories - Summary of Inventories (Details) - USD ($)
$ in Thousands
Jun. 30, 2019
Dec. 31, 2018
Raw materials $ 12,381 $ 13,688
Work-in-process 6,399 4,626
Finished goods 8,747 6,819
Total 27,527 25,133
Inventories, net 22,986 21,300
Inventory, Noncurrent, Total $ 4,541 $ 3,833