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Inventory (Detail) (USD $) In Thousands, unless otherwise specified | Jun. 30, 2014 | Dec. 31, 2013 | Jun. 30, 2013
--- | --- | --- | ---
Inventory [Line Items] |  |  |
Raw materials, current | $ 796 | $ 4,246 |
Work in process | 12,432 | 11,310 |
Finished goods | 3,915 | 5,026 |
Finished goods inventory held by others |  | 627 | 695
Total inventory, current | 17,143 | 21,209 |
Raw materials, long-term |  | 5,482 |
Total inventory | $ 17,143 | $ 26,691 |

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