Quarterly report pursuant to Section 13 or 15(d)

Capital Structure - Common Stock Warrants (Details)

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Capital Structure - Common Stock Warrants (Details) - Common Stock
Sep. 30, 2017
$ / shares
shares
Warrants  
Number of shares underlying warrants 18,986,859
Common stock warrants, expiration date of August 2018  
Warrants  
Number of shares underlying warrants 80,966
Exercise price per share (usd per share) | $ / shares $ 28.00
Common stock warrants, expiration date of October 2018  
Warrants  
Number of shares underlying warrants 4,551,900
Exercise price per share (usd per share) | $ / shares $ 4.55
Common stock warrants, expiration date of October 2018  
Warrants  
Number of shares underlying warrants 40,000
Exercise price per share (usd per share) | $ / shares $ 5.23
Common stock warrants, expiration date of December 2018  
Warrants  
Number of shares underlying warrants 3,571
Exercise price per share (usd per share) | $ / shares $ 28.00
Common stock warrants, expiration date of October 2020  
Warrants  
Number of shares underlying warrants 22,328
Exercise price per share (usd per share) | $ / shares $ 8.40
Common stock warrants, expiration date of May 2022  
Warrants  
Number of shares underlying warrants 2,380
Exercise price per share (usd per share) | $ / shares $ 8.68
Common stock warrants expiration of June 2022  
Warrants  
Number of shares underlying warrants 14,285,714
Exercise price per share (usd per share) | $ / shares $ 0.4