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Related Party Transactions	9 Months Ended
Related Party Transactions	Sep. 30, 2018
Related Party Transactions [Abstract]
Related Party Transactions	12. Related Party Transactions Since the Company’s incorporation in July 2016, the Company has engaged in transactions with related parties. The Company is a party to an intellectual property license agreement with Novartis. In addition, NIBR, an affiliate of Novartis, is a shareholder of the Company (See Note 6). No payments have been made to Novartis during the three and nine months ended September 30, 2018. During the three and nine months ended September 30, 2017, the Company made payments to Novartis for milestones achieved pursuant to the license agreement. The Company is a party to a Funding Agreement with the Silverstein Foundation, an entity in which one of the Company’s directors is a co-founder and current trustee (See Note 7). The Company received $0 and $0.5 million from the Silverstein Foundation during the three and nine months ended September 30, 2018, respectively. No funds were received during the three and nine months ended September 30, 2017.