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Common Stock (Tables)
12 Months Ended
Dec. 31, 2018
Equity [Abstract]  
Schedule of Common Stock Reserved For Future Issuance
The Company has reserved shares of common stock, on an issued and as-converted basis, for future issuance as follows:
 
December 31, 2018
 
December 31, 2017
 
Issued and
Outstanding
 
 
Issued and
Outstanding
 
Common Stock
Equivalent Shares
Common stock
24,450,757

 
 

 

Series 1 common stock

 
 
3,112,955

 
3,112,955

Series 2 common stock

 
 
490,185

 
490,185

Redeemable convertible preferred stock

 
 
11,871,578

 
12,066,654

Restricted stock units outstanding
53,436

 
 

 

Stock options outstanding
2,641,198

 
 
3,001,929

 
3,001,929

Shares available for grant
2,497,082

 
 
29,654

 
29,654

Common stock warrants
118,122

 
 
124,326

 
124,326

Redeemable convertible preferred stock warrants

 
 
156,550

 
160,657

Total
29,760,595

 
 
18,787,177

 
18,986,360