Inventories: (Tables)

6 Months Ended

Jun. 30, 2013

Inventory Disclosure [Abstract]

Schedule of Inventory, Current [Table Text Block]

Inventories consisted of the following:

	June 30, 2013		December 31, 2012
Raw material	$	18,160	$	20,808
Work in process	4,412		3,013
Finished goods	13,709		12,512
Total	$	36,281	$	36,333