Inventories (Tables)

9 Months Ended

Sep. 30, 2016

Inventory Disclosure [Abstract]

Schedule of Inventory, Current [Table Text Block]

	September 30, 2016		December 31, 2015
Finished goods	$	23,863	$	25,778
Parts and materials	11,929		12,637
Work in progress	1,547		2,491
Total inventories	$	37,339	$	40,906