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Stockholders' Equity - Schedule of Common Stock Reserved for Future Issuance (Details) - shares
Mar. 31, 2018
Dec. 31, 2017
Class Of Stock [Line Items]    
Common stock, reserved for future issuance [1] 2,313,991 1,987,682
Warrants Issued and Outstanding    
Class Of Stock [Line Items]    
Common stock, reserved for future issuance [1] 51,003 51,003
Stock Option Awards Issued and Outstanding    
Class Of Stock [Line Items]    
Common stock, reserved for future issuance [1] 1,735,458 1,203,627
Authorized for Grants under the 2016 Equity Incentive Plan    
Class Of Stock [Line Items]    
Common stock, reserved for future issuance [1] 427,530 633,052
Authorized for grants under the 2016 Employee Stock Purchase Plan    
Class Of Stock [Line Items]    
Common stock, reserved for future issuance [1] 100,000 100,000
[1] Treasury stock in the amount of 86,168 and 135,000 as of March 31, 2018 and December 31, 2017, respectively, are excluded from the table above.