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	$	3,739	$	1,921
Work in process	1,170		549
Finished goods	3,152		1,592
Total inventories 1	$	8,061	$	4,062