Note 4 - Balance Sheet Detail - Inventories (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	[1]
Raw materials	$ 19,160	$ 9,072
Work in process	2,744	1,894
Finished goods	6,878	4,011
Total	$ 28,782	$ 14,977

[1] The Raw materials balance in prior year was reclassified for consistency with current year.