5. Inventory

9 Months Ended

Sep. 30, 2013

Inventory Disclosure [Abstract]

5. Inventory

Inventories consist of the following for the periods indicated (in thousands):

	September 30, 2013		December 31, 2012
Raw materials	$	6,710	$	4,755
Work in process		6,539		4,434
Finished goods		3,172		3,304
	$	16,421	$	12,493

The lower of cost or market adjustment expensed for inventory for the three and nine months ended September 30, 2013 was $0.1 million and $0.5 million, respectively. For the three and nine months ended September 30, 2012, the lower of cost or market adjustment expensed for inventory was $0.1 million and $0.3 million, respectively.