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Note 8 - Inventory - Inventory (Details) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Raw materials $ 9,466 $ 9,767
Work in process 555 1,998
Total inventory 10,021 11,765
Allowance for obsolescence (515) (494)
Inventory, net of allowance $ 9,506 $ 11,271