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Related Party Transactions
12 Months Ended
Dec. 31, 2016
Spouse of Executive Officer [Member] | Clinical Operations Consulting Arrangement [Member]  
Related Party Transactions

13. RELATED PARTY TRANSACTIONS

There were no related party transactions in 2016 and 2015.

As part of the consulting arrangement with the spouse of an executive of the Company to provide research and development services related to clinical operations, the Company incurred expenses of $0.2 million for services rendered during year ended December 31, 2014.