Inventories (Tables)

9 Months Ended

Sep. 30, 2015

Inventory Disclosure [Abstract]

Schedule of Inventory, Current [Table Text Block]

	September 30, 2015		June 30, 2015		December 31, 2014
Finished goods	$	30,654	$	34,298	$	32,249
Parts and materials	10,790		10,817		9,147
Work in progress	3,018		2,470		1,975
Total inventories	$	44,462	$	47,585	$	43,371