Inventories (Tables)

3 Months Ended

Mar. 31, 2016

Inventory Disclosure [Abstract]

Schedule of Inventory, Current [Table Text Block]

Inventories consisted of the following (in thousands):

	March 31, 2016			December 31, 2015
Raw materials	$	27,610		$	14,546
Work-in-process	218			98
Finished goods	6,500			7,485
	34,328			22,129
Less: inventory valuation allowance	(4,233		)	(5,317		)
Inventories, net	$	30,095		$	16,812

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
	March 31,
	2016		2015
Inventory, net	$	266	$	(40	)
Adverse purchase commitments	279		576

Deferred cost of sales, which are directly associated with deferred revenue on shipments to customers, was $0.0 million and $14.1 million at March 31, 2016 and December 31, 2015.