Quarterly report pursuant to Section 13 or 15(d)

Capital Structure - Warrants (Details)

v3.10.0.1
Capital Structure - Warrants (Details) - Common Stock - USD ($)
$ / shares in Units, $ in Millions
 1 Months Ended
Oct. 31, 2018
Sep. 30, 2018
Common stock warrants, expiration date of October 2018    
Common Stock Warrants    
Number of shares available under warrant (in shares)   4,551,071
Exercise price per share (in dollars per share)   $ 4.55
Common stock warrants, expiration date of October 2018    
Common Stock Warrants    
Number of shares available under warrant (in shares)   40,000
Exercise price per share (in dollars per share)   $ 5.23
Common stock warrants, expiration date of December 2018    
Common Stock Warrants    
Number of shares available under warrant (in shares)   3,571
Exercise price per share (in dollars per share)   $ 28.00
Common stock warrants, expiration date of October 2020    
Common Stock Warrants    
Number of shares available under warrant (in shares)   22,328
Exercise price per share (in dollars per share)   $ 8.40
Common stock warrants, expiration date of May 2022    
Common Stock Warrants    
Number of shares available under warrant (in shares)   2,380
Exercise price per share (in dollars per share)   $ 8.68
Common stock warrants expiration date of June 2022    
Common Stock Warrants    
Number of shares available under warrant (in shares)   14,285,714
Exercise price per share (in dollars per share)   $ 0.40
Warrants on common stock    
Common Stock Warrants    
Number of shares available under warrant (in shares)   18,905,064
Subsequent Event | Common stock warrants, expiration date of October 2018    
Common Stock Warrants    
Number of shares available under warrant (in shares) 4,600,000  
Warrants exercised in period (in shares) 100,000  
Proceeds from warrant exercises $ 0.6  
Warrants expired in period (in shares) 4,500,000