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Summary of Significant Accounting Policies - Share-Based Compensation (Details)
9 Months Ended
Sep. 30, 2016
shares
Incentive Plan  
Share-based Compensation  
Expiration period 10 years
Shares reserved for issuance 540,483
2015 Incentive Compensation Plan  
Share-based Compensation  
Expiration period 10 years
Shares available for grant (in shares) 559,579
2015 Incentive Compensation Plan | Restricted Stock Units (RSUs)  
Share-based Compensation  
Shares reserved for issuance 35,483