5. Inventory

6 Months Ended

Jun. 30, 2014

Inventory Disclosure [Abstract]

5. Inventory

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

	June 30, 2014		December 31, 2013
Raw materials	$	13,212	$	8,832
Work in process		12,947		8,708
Finished goods		5,041		2,068
	$	31,200	$	19,608

The lower of cost or market adjustment expensed for inventory for the three months ended June 30, 2014 and 2013 was $0.5 million and $0.3 million, respectively. The lower of cost or market adjustment expensed for inventory for the six months ended June 30, 2014 and 2013 was $0.8 million and $0.4 million, respectively.