Inventories (Tables)

3 Months Ended

Mar. 31, 2016

Inventory Disclosure [Abstract]

Schedule of Inventory, Current [Table Text Block]

Inventories consist of the following (in thousands):

	March 31, 2016		December 31, 2015
Purchased materials	$	182	$	164
Finished goods	3,145		2,729
	$	3,327	$	2,893