Inventories (Tables)

6 Months Ended

Jun. 30, 2020

Inventory Disclosure [Abstract]

Schedule of inventories

Inventories at June 30, 2020 and December 31, 2019 consisted of the following:

(in thousands)	June 30, 2020		December 31, 2019
Raw material	$	2,969	$	3,401
Work-in-process	7,616		7,278
Finished goods	13,310		10,974
Supplies	1,224		968
Total inventories	$	25,119	$	22,621