Quarterly report pursuant to Section 13 or 15(d)

Preferred Stock - Additional Information (Detail)

v3.2.0.727
Preferred Stock - Additional Information (Detail) - USD ($)
 1 Months Ended 6 Months Ended
Dec. 01, 2014
Jun. 30, 2014
Dec. 31, 2014
Jun. 30, 2015
Preferred Stock [Line Items]        
Preferred stock authorized to issue       5,000,000
Preferred stock, outstanding     0  
Convertible stock, Conversion of preferred stock 36,300,171   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%