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Deferred Costs	3 Months Ended
Deferred Costs	Mar. 31, 2017
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 $3.5 million and $3.6 million as of March 31, 2017 and December 31, 2016, respectively. The Company also has deferred revenue of approximately $4.3 million and $4.0 million of advance billings received as of March 31, 2017 and December 31, 2016, respectively, related to these contracts.