Inventories (Tables)

3 Months Ended

Mar. 31, 2017

Inventory Disclosure [Abstract]

Schedule of Inventory, Current [Table Text Block]

Inventories consisted of the following (in thousands):

	March 31, 2017			December 31, 2016
Raw materials	$	16,917		$	24,805
Work-in-process	—			12
Finished goods	3,924			5,005
	20,841			29,822
Less: inventory valuation allowance	(9,996		)	(9,801		)
Inventories, net	$	10,845		$	20,021

Charges Associated with Inventory [Table Text Block]

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

	Three Months Ended
	March 31,
	2017		2016
Inventory, net	$	501	$	266
Adverse purchase commitments(A)	201		279
Net charges	$	702	$	545

(A) When the Company takes possession of inventory reserved for under the adverse purchase liability (Note 7 — Commitments and Contingencies), the associated liability is transferred from other accrued liabilities to the excess and obsolete inventory valuation allowance.