Inventories

12 Months Ended

Dec. 31, 2020

Inventories [Line Items]

Inventory Disclosure [Text Block]

5.  Inventories

Inventories consist of the following:

In thousands	2020		2019
Raw materials	$	1,124	$	1,393
Work-in-progress		324		512
Finished goods		94		277
Total inventory	$	1,542	$	2,182