Inventories (Tables)

3 Months Ended

Mar. 31, 2015

Inventory Disclosure [Abstract]

Schedule of Inventory, Current [Table Text Block]

Inventories consist of the following (in thousands):

	March 31, 2015		December 31, 2014
Purchased materials	$	334	$	402
Finished goods	2,822		2,841
	$	3,156	$	3,243