Inventories: (Tables)
9 Months Ended
Sep. 30, 2011
Inventory Disclosure [Abstract] 
Schedule of Inventory, Current [Table Text Block]
Inventories consisted of the following:
 
 
September 30, 2011
 
December 31, 2010
Raw material
$
24,262


 
$
22,805


Work in process
3,721


 
3,806


Finished goods
15,380


 
17,445


Total
$
43,363


 
$
44,056