Inventories (Tables)

6 Months Ended

Jun. 30, 2014

Inventory Disclosure [Abstract]

Schedule of Inventory, Current [Table Text Block]

Inventories consisted of the following (in thousands):

	June 30, 2014			December 31, 2013
Raw materials	$	16,836		$	22,416
Work-in-process	665			1,194
Finished goods	9,750			9,644
	27,251			33,254
Less: inventory valuation allowance	(7,475		)	(7,845		)
Inventories, net	$	19,776		$	25,409

Charges Associated with Inventory [Table Text Block]

The Company recorded the following charges associated with the valuation of inventory and the adverse purchase commitment liability (in thousands):

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2014		2013		2014		2013
Inventory, net	$	182	$	429	$	1,344	$	1,467
Adverse purchase commitments	281		164		154		132