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Note 9 - Inventory - Inventory Components (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Raw materials $ 15,994 $ 12,354
Work in process 5,385 6,331
Finished goods 1,251 1,313
Reserve for excess and obsolete inventory (1,421) (1,414)
Total $ 21,209 $ 18,584