Inventories (Tables)

12 Months Ended

Dec. 31, 2019

Inventories [Abstract]

Schedule of Inventory, Current [Table Text Block]

Inventories consisted of the following:

	December 31,
(in thousands)	2019		2018
Raw materials	$	24,727	$	6,214
Work in process	3,700		549
Finished goods	11,346		12,179
Total inventories	$	39,773	$	18,942