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Inventory | 6 Months Ended
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Jun. 30, 2018
Inventory Disclosure [Abstract] |
Inventory | Inventory Our inventory, net of allowance for obsolescence of $20,785 and $15,000 at June 30, 2018 and December 31, 2017, respectively, consisted of the following amounts:
| June 30, 2018 |  | December 31, 2017
| (in thousands) |  |
Raw materials - current | $ | 19,565 |  | $ | 22,813
Raw materials - long term | 3,467 |  | 2,829
Finished Goods | 1,022 |  | 1,022
Work in process | 2,455 |  | 2,389
| $ | 26,509 |  | $ | 29,053
Our long-term inventory consists of raw materials that remain viable but that the Company does not expect to sell within the year. During the six months ended June 30, 2018 and 2017, there were no write-offs of obsolete inventory against the allowance for obsolescence.

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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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