Inventories: (Tables)

6 Months Ended

Jun. 30, 2012

Inventory Disclosure [Abstract]

Schedule of Inventory, Current [Table Text Block]

Inventories consisted of the following:

	June 30, 2012		December 31, 2011
Raw material	$	20,651	$	25,227
Work in process	3,526		2,901
Finished goods	12,358		12,295
Total	$	36,535	$	40,423