Inventories (Tables)

3 Months Ended

Mar. 31, 2016

Inventory Disclosure [Abstract]

Schedule of Inventory, Current [Table Text Block]

	March 31, 2016		December 31, 2015
Finished goods	$	27,285	$	25,778
Parts and materials	12,693		12,637
Work in progress	1,724		2,491
Total inventories	$	41,702	$	40,906