Current report filing

Note 15 - Preferred Stock (Details Textual)

v3.8.0.1
Note 15 - Preferred Stock (Details Textual) - USD ($)
$ / shares in Units, $ in Thousands
 1 Months Ended 12 Months Ended 37 Months Ended
Aug. 31, 2015
Nov. 30, 2014
Jun. 30, 2013
Dec. 31, 2014
Dec. 31, 2013
Jun. 30, 2016
Dec. 31, 2016
Dec. 31, 2015
Class of Warrant or Right, Exercise Price of Warrants or Rights [1]             $ 0.33  
Preferred Stock, Shares Outstanding             0 0
Minimum [Member]                
Class of Warrant or Right, Exercise Price of Warrants or Rights             $ 0.01  
Platinum Management New York LLC [Member] | Minimum [Member]                
Common Stock Distribution or Issuance Effective Price $ 1.35              
Platinum [Member] | Common Stock [Member]                
Conversion of Stock, Shares Issued       14,459,940 5,682,933      
Platinum Partners Value Arbitrage Fund [Member] | Common Stock [Member]                
Stock Repurchased During Period, Shares   4,499,520            
Series LL Warrants [Member]                
Class of Warrant or Right, Exercise Price of Warrants or Rights             $ 0.01  
Series LL Warrants [Member] | Platinum Management New York LLC [Member]                
Class of Warrant or Right, Exercise Price of Warrants or Rights $ 0.01              
Class of Warrant or Right, Number of Securities Called by Warrants or Rights 14,777,130              
Preferred Stock, Liquidation Preference, Value $ 0              
Gain (Loss) from Exchange of Warrants $ 0              
Platinum-Montaur Life Sciences LLC Litigation [Member]                
Stock for Stock Conversion Number of Shares Converted     2,364.9          
Number of Common Shares Underlying Series B Preferred Stock     7,733,223          
Shares Conversion, Number of Common Stock Equivalent to Each Preferred Stock     3,270          
Platinum-Montaur Life Sciences LLC Litigation [Member] | Series X Warrants And Series AA Warrants [Member]                
Number of Common Shares Underlying Series B Preferred Stock           7,733,223    
Series B Preferred Stock [Member]                
Stock for Stock Conversion Number of Shares Converted           2,364.9    
Preferred Stock, Shares Outstanding 0              
Series B Preferred Stock [Member] | Platinum Management New York LLC [Member]                
Preferred Stock Exchanged for Warrants During Period, Shares 4,519              
Class of Warrant or Right, Outstanding Term 20 years              
Shares Conversion, Number of Common Stock Equivalent to Each Preferred Stock 3,270              
Warrant Issued Upon Exchange of Preferred Stock 14,777,130              
Series B Preferred Stock [Member] | Platinum [Member]                
Conversion of Stock, Shares Converted       4,422 1,737.9      
Series B Preferred Stock [Member] | Platinum Partners Value Arbitrage Fund [Member]                
Stock Issued During Period, Shares, New Issues   1,376            
[1] Weighted average exercise price.