Inventories (Tables)

12 Months Ended

Dec. 31, 2016

Inventory Disclosure [Abstract]

Schedule of Inventory, Current [Table Text Block]

Inventories, net of reserves, are summarized as follows:

	December 31,
	2016		2015
Raw materials	$	4,001	$	4,820
Work in process		1,860		1,732
Finished goods		4,143		4,913
		10,004		11,465
Less current inventory		(5,064)		(5,595)
		4,940		5,870
Less reserve for slow moving and excess inventory		(3,949)		(4,426)
	$	991	$	1,444