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Deferred Costs | 3 Months Ended
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Mar. 31, 2016
Inventories [Abstract] |
Deferred Costs | Deferred Costs Deferred costs, representing work in process for costs incurred on process development contracts that have not been completed, were $4.0 million and $2.9 million as of March 31, 2016 and December 31, 2015, respectively. The Company also has deferred revenue of approximately $4.9 million and $4.9 million of advance billings received as of March 31, 2016 and December 31, 2015, respectively, related to these contracts.

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