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Deferred Costs | 6 Months Ended
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Jun. 30, 2015
Inventories [Abstract] |
Deferred Costs | Deferred costs, representing work in process for costs incurred on process development contracts that have not been completed, were $3.0 million and $2.6 million as of June 30, 2015 and December 31, 2014, respectively. The Company also has deferred revenue of approximately $4.3 million and $3.9 million of advance billings received as of June 30, 2015 and December 31, 2014, respectively, related to these contracts.

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