Quarterly report pursuant to Section 13 or 15(d)

Preferred Stock - Additional Information (Detail)

v3.3.0.814
Preferred Stock - Additional Information (Detail) - USD ($)
 9 Months Ended
Dec. 01, 2014
Jun. 30, 2014
Sep. 30, 2015
Dec. 31, 2014
Preferred Stock [Line Items]        
Preferred stock authorized to issue     5,000,000  
Preferred stock, shares outstanding     0 0
Convertible stock, Conversion of preferred stock 36,300,171      
Series C Convertible Preferred Stock        
Preferred Stock [Line Items]        
Preferred stock authorized to issue     25,000  
Preferred stock , Par value     $ 0.001  
Preferred stock, cumulative dividends rate     10.00%  
Preferred stock, stated value for cumulative dividends     $ 1,000  
Series E Redeemable Convertible Preferred Stock        
Preferred Stock [Line Items]        
Convertible redeemable preferred stock, shares authorized     10,000  
Convertible redeemable preferred stock, par value     $ 0.001  
Series F Redeemable Convertible Preferred Stock        
Preferred Stock [Line Items]        
Convertible redeemable preferred stock, shares authorized     10,000  
Convertible redeemable preferred stock, par value     $ 0.001  
Series G Redeemable Convertible Preferred Stock        
Preferred Stock [Line Items]        
Preferred stock authorized to issue     18,000  
Preferred stock , Par value     $ 0.001  
Preferred stock, issued   18,000    
Convertible stock, Conversion of preferred stock   5,404    
Conversion price     $ 2.30  
Series G Redeemable Convertible Preferred Stock | Dated April 17, 2014        
Preferred Stock [Line Items]        
Debt exchanged with stock, shares   10,956,000    
Debt exchanged with stock, amount   $ 10,956,000    
Series G Redeemable Convertible Preferred Stock | Dated February 25, 2014        
Preferred Stock [Line Items]        
Debt exchanged with stock, shares   1,640    
Debt exchanged with stock, amount   $ 1,640,085    
Series F Convertible Preferred Stock        
Preferred Stock [Line Items]        
Preferred stock, cumulative dividends rate     7.00%  
Exchange agreement, shares received   5,000    
Series E Convertible Preferred Stock        
Preferred Stock [Line Items]        
Preferred stock, cumulative dividends rate     5.00%  
Series G Convertible Preferred Stock        
Preferred Stock [Line Items]        
Preferred stock, cumulative dividends rate     9.00%