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Inventories | 12 Months Ended
--- | ---
Dec. 31, 2017
Inventory Disclosure [Abstract] |
Inventories | 3. Inventories Inventories consist of the following (in thousands):
|  | December 31, |
|  | 2017 |  |  | 2016 |
Raw materials |  | $ | 572 |  |  | $ | — |
Work-in-process |  |  | 1,273 |  |  |  | 2,120 |
Finished goods |  |  | 812 |  |  |  | 211 |
Total inventory |  | $ | 2,657 |  |  | $ | 2,331 |
Work-in-process and finished goods as of December 31, 2017 and 2016 include conversion costs but not materials cost because the materials used in its production were previously written off. During the years ended December 31, 2017 and 2015, the Company recorded a write-down of inventory of approximately $3.0 million and $36.1 million, respectively, for inventory that was forecasted to become obsolete due to expiration which is recorded in costs of goods sold in the accompanying consolidated statements of operations. There was no write-down of inventory for the year ended December 31, 2016.

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- Definition The entire disclosure for inventory. Includes, but is not limited to, the basis of stating inventory, the method of determining inventory cost, the classes of inventory, and the nature of the cost elements included in inventory. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -URI http://asc.fasb.org/topic&trid=2126998 + Details
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