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Convertible Preferred Stock and Common Stock Warrants (Tables)
3 Months Ended
Mar. 31, 2017
Equity [Abstract]  
Schedule of Stockholders' Equity Note, Warrants or Rights
As of March 31, 2017, the Company had the following warrants outstanding to acquire shares of its common stock:
 
Outstanding
 
Range of exercise price per share
Common stock warrants issued prior to Merger
460,721

 
$20.00 - $750.00
Common stock warrants issued in Series A
13,555,887

 
$2.22
 
14,016,608