Note 4 - Net Inventories (Tables)

6 Months Ended

Jun. 30, 2018

Inventory Disclosure [Abstract]

Schedule of Inventory, Current

Net inventories consist of the following:

	June 30, 2018		December 31, 2017
Finished goods	$	14,981	$	41,521
Work in process		36,661		47,386
Raw materials		40,667		42,491
Supplies		7,253		7,144
Total	$	99,562	$	138,542