Inventories (Tables)

6 Months Ended

Jun. 30, 2020

Inventory Disclosure [Abstract]

Schedule of Inventories

Inventories were comprised of the following:

	June 30, 2020		December 31, 2019
Raw materials	$	17,589	$	18,011
Work-in-process		32,378		35,942
Finished goods		16,274		17,159
Supplies		10,501		11,177
Inventories	$	76,742	$	82,289