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Stockholders' Equity (Tables)
 3 Months Ended
Mar. 31, 2018
Class Of Stock Disclosures [Abstract]  
Schedule of Common Stock Reserved for Future Issuance

The following common stock is reserved for future issuance at March 31, 2018 and December 31, 2017:

 

 

 

March 31, 2018 (1)

 

 

December 31, 2017 (1)

 

Warrants issued and outstanding

 

 

51,003

 

 

 

51,003

 

Stock option awards issued and outstanding

 

 

1,735,458

 

 

 

1,203,627

 

Authorized for grants under the 2016 Equity Incentive Plan

 

 

427,530

 

 

 

633,052

 

Authorized for grants under the 2016 Employee Stock Purchase Plan

 

 

100,000

 

 

 

100,000

 

 

 

 

2,313,991

 

 

 

1,987,682

 

 

(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.