Inventories (Tables)

3 Months Ended

Mar. 31, 2013

Schedule of Inventory, Current [Table Text Block]

	March 31, 2013	December 31, 2012
Raw materials	$ 4,670	$ 4,340
Work in progress	1,853	1,815
Finished goods	2,351	2,542
Inventories	$ 8,874	$ 8,697