Annual report pursuant to section 13 and 15(d)

Preferred Stock - Additional Information (Detail)

v2.4.0.8
Preferred Stock - Additional Information (Detail) (USD $)
3 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 1 Months Ended 3 Months Ended 1 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended
Dec. 31, 2012
Dec. 31, 2013
May 14, 2013
Sep. 25, 2012
Sep. 12, 2012
Dec. 31, 2013
Series B
Dec. 31, 2012
Series B Preferred Stock
Dec. 31, 2013
Series B Preferred Stock
Dec. 31, 2013
Series C Convertible Preferred Stock
D
Dec. 31, 2012
Series C Convertible Preferred Stock
Dec. 20, 2012
Series C Convertible Preferred Stock
Dec. 31, 2013
Series C Convertible Preferred Stock
Period 3
Dec. 31, 2013
Series C Convertible Preferred Stock
Period 4
May 15, 2013
Series D Convertible Preferred Stock
Mar. 31, 2013
Series D Convertible Preferred Stock
Dec. 31, 2013
Series D Convertible Preferred Stock
Dec. 31, 2012
Series D Convertible Preferred Stock
Dec. 20, 2012
Series D Convertible Preferred Stock
Feb. 21, 2013
Series E Convertible Preferred Stock
Dec. 31, 2013
Series E Convertible Preferred Stock
Dec. 31, 2013
Series E Convertible Preferred Stock
After Trigger Date
Dec. 31, 2013
Series E Convertible Preferred Stock
Scenario 2
Aug. 22, 2013
Series F Convertible Preferred Stock
Dec. 31, 2013
Series F Convertible Preferred Stock
Dec. 31, 2013
Series A Preferred Stock
Dec. 31, 2012
Series A Preferred Stock
Preferred Stock [Line Items]                                                    
Preferred stock authorized to issue   5,000,000           1,000,000 25,000 25,000           13,000 13,000               3,000  
Preferred stock, issued         600,000       10,000 10,000             11,000               0 0
Preferred stock, outstanding                 10,000 10,000              11,000               0 0
Preferred stock , Par value               $ 0.001 $ 0.001 $ 0.001           $ 0.001 $ 0.001                  
Proceeds from issuance of convertible preferred stock           $ 6,000,000 $ 5,195,000   $ 10,000,000                   $ 5,000,000       $ 5,000,000      
Conversion price per share   $ 0.13             $ 0.6889         $ 0.6959         $ 1.17       $ 4.5881      
Convertible Preferred Stock, Total Shares Issued Upon Conversion         46,153,846                                          
Ownership Percentage   73.00%                                                
Convertible stock, Conversion of preferred stock 599,998                         11,915                        
Convertible stock, Conversion of convertible securities 46,153,692                         1,712,167                        
Liquidation preference per share         $ 10           $ 1,000             $ 100 $ 1,000       $ 1,000      
Common stock price in increased rate       $ 0.59                                            
Preferred stock issued due to investment agreement                     10,000             11,177 5,000       5,000      
Preferred stock conversion as a percentage its stated value in an event of a change in control or a merger or recapitalization                       150.00% 125.00%                          
Preferred stock conversion, trading price as percentage of conversion price                 200.00%                                  
Preferred stock conversion, number of trading days                 20 days                                  
Preferred stock conversion, number of immediate preceding consecutive trading days                 30                                  
Preferred stock, cumulative dividends rate                 10.00%                     5.00%       7.00%    
Preferred stock, stated value for cumulative dividends                 $ 1,000                                  
Preferred stock, dividends accrued                 1,014,000                                  
Merger agreement, number of shares issued                             738                      
Convertible redeemable preferred stock, shares authorized                                       10,000       10,000    
Convertible redeemable preferred stock, par value                                       $ 0.001       $ 0.001    
Preferred stock redemption price as percentage of liquidation preference                                         110.00% 105.00%        
Accrual of dividends on convertible preferred stock   1,360,000               31,000                   218,000       129,000    
Embedded Derivative, Gain (Loss) on Embedded Derivative, Net   (6,990,000)                                                
Embedded derivative, fair value of embedded derivative liability     8,600,000                                              
Preferred stock redemption price additional amount with liquidation preference                                               $ 100,000