Inventories (Tables)

3 Months Ended

Mar. 31, 2014

Inventory Disclosure [Abstract]

Schedule of Inventory, Current [Table Text Block]

Inventories consisted of the following (in thousands):

	March 31, 2014			December 31, 2013
Raw materials	$	22,935		$	22,416
Work-in-process	465			1,194
Finished goods	9,188			9,644
	32,588			33,254
Less: inventory valuation allowance	(8,697		)	(7,845		)
Inventories, net	$	23,891		$	25,409

Charges Associated with Inventory [Table Text Block]

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

	Three Months Ended
	March 31,
	2014		2013
Inventory, net	$	1,162	$	1,038
Adverse purchase commitments	(127)		(32)