Inventories: (Tables)

9 Months Ended

Sep. 30, 2012

Inventory Disclosure [Abstract]

Schedule of Inventory, Current [Table Text Block]

Inventories consisted of the following:

	September 30, 2012		December 31, 2011
Raw material	$	20,855	$	25,227
Work in process	3,095		2,901
Finished goods	13,637		12,295
Total	$	37,587	$	40,423