INVENTORY

Inventory consists of the following at June 30, 2018 and December 31, 2017:



(in thousands)	June 30, 2018		December 31, 2017
Raw materials	$	1,493	$	469
Work in process	43,761		25,160
Finished goods	3,330		3,066
Total inventory	$	48,584	$	28,695

We wrote off approximately $1.2 million and $0.3 million of inventory that was determined to no longer be suitable for commercial manufacture, which was recorded to cost of goods sold during the three months ended June 30, 2018 and June 30, 2017, respectively, and $5.3 million and $0.3 million during the six months ended June 30, 2018 and June 30, 2017, respectively.