Inventories (Tables)

12 Months Ended

Dec. 31, 2015

Inventory Disclosure [Abstract]

Schedule of Inventory, Current

Inventories consisted of the following (in thousands):

	December 31, 2015			December 31, 2014
Raw materials	$	14,546		$	9,219
Work-in-process	98			1,195
Finished goods	7,485			10,762
	22,129			21,176
Less: inventory valuation allowance	(5,317		)	(2,701		)
Inventories, net	$	16,812		$	18,475

Charges Associated with Inventory

The Company recorded the following charges associated with the valuation of inventory, inventory deposit and the adverse purchase commitment liability for the years ended December 31 (in thousands):

	2015			2014		2013
Inventory, net	$	1,476		$	2,412	$	3,302
Inventory deposit, net	(29		)	126		945
Adverse purchase commitments	1,831			323		327

Change in Inventory Valuation Allowance

The following is a summary of the change in the Company’s inventory valuation allowance for the years ended December 31 (in thousands):

	2015			2014
Inventory valuation allowance, beginning of the year	$	2,701		$	7,037
Usage:
Inventory scrapped	(151		)	(5,768		)
Inventory utilized	(856		)	(1,005		)
Subtotal—usage	(1,007		)	(6,773		)
Write-downs of inventory valuation	2,332			3,417
Transfer from other liabilities (A)	1,291			(1,013		)
Transfer from inventory deposit valuation allowance	—			33
Inventory valuation allowance, end of the year	$	5,317		$	2,701