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Stockholders' Equity - Preferred Stock (Details) - USD ($)
 12 Months Ended
Nov. 28, 2017
Nov. 02, 2017
Jun. 16, 2016
Dec. 31, 2017
Dec. 31, 2016
Nov. 27, 2017
Jun. 15, 2016
May 11, 2016
May 10, 2016
Preferred Stock [Abstract]                  
Preferred stock, shares authorized (in shares)       5,000,000 5,000,000        
Preferred stock, par value (in dollars per share)       $ 0.001 $ 0.001        
Preferred stock, shares issued (in shares)       23,500 23,500        
Series A convertible preferred stock, shares outstanding       2,431 0        
Number of shares callable by warrants (in shares)             1 1,100,000 16,000,000
Warrant exercise price (in dollars per share)             $ 3.06    
Common stock issued (in shares) 10,000   6,704,852            
Common Stock [Member]                  
Preferred Stock [Abstract]                  
Number of shares callable by warrants (in shares)       1          
Warrant exercise price (in dollars per share) $ 0.3333     $ 3.06          
Period exercisable from the date of issuance       30 months          
Common stock issued (in shares) 10,000   6,704,852 12,237,079 8,673,253        
Gross proceeds from private placement of stock     $ 15,300,000            
Redemption price of warrant prior to expiration       $ 0.01          
Common stock price per share for warrant redemption       $ 7.65          
Number of consecutive trading days for warrant redemption       10 days          
2017 Rights Offering [Member]                  
Preferred Stock [Abstract]                  
Charge on Non Transferable Subscription Rights   $ 0              
Number of shares callable by warrants (in shares)   10,000              
Warrant exercise price (in dollars per share)   $ 0.3333              
Period exercisable from the date of issuance       30 months          
Common stock issued (in shares) 10,000                
Gross proceeds from private placement of stock $ 8,800,000                
Redemption price of warrant prior to expiration       $ 0.01          
Common stock price per share for warrant redemption       $ 0.833          
Number of consecutive trading days for warrant redemption       10 days          
2017 Rights Offering [Member] | Warrant [Member]                  
Preferred Stock [Abstract]                  
Number of shares callable by warrants (in shares)   18              
2017 Rights Offering [Member] | Common Stock [Member]                  
Preferred Stock [Abstract]                  
Number of shares callable by warrants (in shares)   1              
Series A Convertible Preferred Stock [Member]                  
Preferred Stock [Abstract]                  
Preferred stock, shares issued (in shares)       13,500 13,500        
Convertible preferred stock       3.60% 3.60%        
Series A convertible preferred stock, shares outstanding       0 0        
Series B Convertible Preferred Stock [Member]                  
Preferred Stock [Abstract]                  
Preferred stock, shares authorized (in shares)           10,000      
Preferred stock, par value (in dollars per share)           $ 0.001      
Number of shares callable by warrants (in shares) 18,000,000                
Common stock issued (in shares) 30,000,000                
Percentage of preferred stock converted to common stock       75.00%          
Series B Convertible Preferred Stock [Member] | Dividend Paid [Member]                  
Preferred Stock [Abstract]                  
Dividends payable       $ 4,000,000          
Series B Convertible Preferred Stock [Member] | 2017 Rights Offering [Member]                  
Preferred Stock [Abstract]                  
Number of shares callable by warrants (in shares)   10,000