Quarterly report pursuant to Section 13 or 15(d)

Capitalization and Equity Structure (Details)

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Capitalization and Equity Structure (Details) - $ / shares
shares in Thousands
 3 Months Ended
Mar. 31, 2016
Dec. 31, 2015
Schedule of Capitalization, Equity [Line Items]    
Merger/PPO Warrant Shares Outstanding 4,085 4,085
2015 Series A Preferred Warrants [Member]    
Schedule of Capitalization, Equity [Line Items]    
Exercise price $ 8.75  
Warrant term 5 years  
Merger/PPO Warrant Shares Outstanding 2,122 2,122
Pre 2014 Warrants [Member]    
Schedule of Capitalization, Equity [Line Items]    
Exercise price $ 9.66  
Merger/PPO Warrant Shares Outstanding 88 88
2014 PPO and Merger [Member] | Placement agent warrants [Member]    
Schedule of Capitalization, Equity [Line Items]    
Exercise price $ 7  
Warrant term 5 years  
Merger/PPO Warrant Shares Outstanding 426 426
2014 PPO and Merger [Member] | Bridge warrants [Member]    
Schedule of Capitalization, Equity [Line Items]    
Exercise price $ 7  
Warrant term 3 years  
Merger/PPO Warrant Shares Outstanding 371 371
2014 PPO and Merger [Member] | PPO warrants [Member]    
Schedule of Capitalization, Equity [Line Items]    
Exercise price $ 14  
Warrant term 5 years  
Merger/PPO Warrant Shares Outstanding 1,078 1,078