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Subsequent Events (Details) - USD ($)
Aug. 08, 2016
Jul. 13, 2016
May 09, 2016
Jan. 12, 2016
Mar. 18, 2015
May 08, 2013
Jul. 29, 2016
Jun. 30, 2016
May 10, 2016
Dec. 31, 2015
Subsequent Event [Line Items]                    
Issuance of common stock, shares       19,772,727 24,358,974          
Stock purchase price per share (usd per share)       $ 1.10            
Exercise price (usd per share)       $ 1.42 $ 2.08 $ 2.47     $ 1.51  
Number of shares availabe from warrants         1,826,923          
Interest payments at the fixed coupon rate           8.45%        
Warrant term           7 years        
Warrants outstanding               37,418,000   22,308,000
Reserved for future issuance               59,111,000    
Share Price         $ 1.56          
Subsequent Event [Member]                    
Subsequent Event [Line Items]                    
Exercise price (usd per share)   $ 0.65 $ 1.51       $ 0.43      
Warrant exercise period (in years)   5 years                
Proceeds from issuance of warrants   $ 11,700,000                
Number of shares availabe from warrants     2,000,000              
Warrant term     5 years              
Warrants outstanding     1,000,000              
Debt Instrument, Covenant, Liquidity Covenant     $ 24,000,000              
Senior Secured Debentures [Member]                    
Subsequent Event [Line Items]                    
Debt Instrument, Face Amount               $ 25,500,000.0    
Senior Secured Debentures [Member] | Subsequent Event [Member]                    
Subsequent Event [Line Items]                    
Dent Instrument, Original Issue Discount, Percent     6.375%              
Debt Instrument, Face Amount     $ 25,530,000              
Proceeds from Issuance of Secured Debt     $ 23,400,000              
Interest payments at the fixed coupon rate     9.00%              
Debt Instrument, Principal That Could Be Redeemed     $ 1,100,000              
Debt Instrument, Redemption Price, Percentage     7.50%              
Debt Instrument, Placement Agent Fee, Percent of Funds Received     2.00%              
Common Stock [Member] | Subsequent Event [Member]                    
Subsequent Event [Line Items]                    
Issuance of common stock, shares   28,000,000                
Stock purchase price per share (usd per share)   $ 0.45                
New warrants issued during period (in shares)   14,000,000                
Private Placement [Member]                    
Subsequent Event [Line Items]                    
Reserved for future issuance               400,000    
Private Placement [Member] | Subsequent Event [Member]                    
Subsequent Event [Line Items]                    
Reserved for future issuance 500,000                  
Share Price $ 0.50                  
Maximum consideration received on transaction under Purchase Agreement $ 2,000,000                  
Maximum [Member]                    
Subsequent Event [Line Items]                    
Number of shares availabe from warrants           182,186        
Maximum [Member] | Private Placement [Member] | Subsequent Event [Member]                    
Subsequent Event [Line Items]                    
Allowable ownership interest under Purchase Agreement 4.99%                  
Maximum [Member] | Sale Of Stock, Tranche One [Member] | Private Placement [Member] | Subsequent Event [Member]                    
Subsequent Event [Line Items]                    
Reserved for future issuance 750,000                  
Maximum [Member] | Sale Of Stock, Tranche Two [Member] | Private Placement [Member] | Subsequent Event [Member]                    
Subsequent Event [Line Items]                    
Reserved for future issuance 1,000,000                  
Minimum [Member] | Sale Of Stock, Tranche One [Member] | Private Placement [Member] | Subsequent Event [Member]                    
Subsequent Event [Line Items]                    
Share Price $ 0.40                  
Minimum [Member] | Sale Of Stock, Tranche Two [Member] | Private Placement [Member] | Subsequent Event [Member]                    
Subsequent Event [Line Items]                    
Share Price $ 0.75