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Stockholders' Equity (Tables)
3 Months Ended
Mar. 31, 2019
Equity [Abstract]  
Schedule of Common Stock Shares Reserved for Future Issuance

The Company had reserved shares of common stock for issuance as follows:

 

 

March 31,

 

 

December 31,

 

 

 

2019

 

 

2018

 

Options issued and outstanding

 

 

1,885,914

 

 

 

2,094,137

 

Unvested restricted stock units

 

 

896,759

 

 

 

547,891

 

Common stock warrants issued and outstanding

 

 

4,857

 

 

 

4,857

 

Shares available for grant under future stock plans

 

 

6,789,722

 

 

 

5,607,014

 

Total

 

 

9,577,252

 

 

 

8,253,899