Inventories (Tables)

3 Months Ended

Mar. 31, 2017

Inventory Disclosure [Abstract]

Schedule of Inventory, Current [Table Text Block]

	March 31 2017		December 31 2016
In thousands
Raw materials	$	1,477	$	1,245
Work-in-progress		458		410
Finished goods		222		238
	$	2,157	$	1,893