Inventories (Tables)

3 Months Ended

Mar. 31, 2015

Inventory Disclosure [Abstract]

Schedule of Inventory, Current [Table Text Block]

	March 31,	December 31,
	2015	2014
Raw materials	$                 2,559	$                 2,744
Work in process	1,047	902
Finished goods	2,426	2,652
Inventories	$                 6,032	$                 6,298