Shareholders' Equity (Tables)
 12 Months Ended
Dec. 31, 2016
Equity [Abstract]  
Schedule of original assumptions for Series G and H Warrants issued
 
    Exercise
Price		     Closing
Market
Price		     Risk-free
Rate		     Market
Price
Volatility		     Remaining
Term (years)		  
Series G Warrant   $ 496.80     $ 426.00       1.240 %     121.21 %     5.0   

 

 

    Exercise
Price		     Closing
Market
Price		     Risk-free
Rate		     Market
Price
Volatility		     Remaining
Term (years)		  
Series H Warrant   $ 165.00     $ 146.40       1.210 %     127.60 %     5.0   
Schedule of shares of Class A common stock reserved for future issuance

 

Stock options and grants outstanding under incentive plans     205  
Common stock warrants outstanding - derivative liability     14,111  
Common stock warrants outstanding - equity security     668,582  
Total shares reserved for future issuance     682,898