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Convertible Debt - Additional Information (Detail) (USD $)
6 Months Ended 3 Months Ended 6 Months Ended 9 Months Ended 6 Months Ended 6 Months Ended
Jun. 30, 2012
Jan. 14, 2011
Jun. 30, 2012
10% convertible debentures
Mar. 31, 2011
10% convertible debentures
Jun. 30, 2012
10% convertible debentures
Sep. 30, 2009
10% convertible debentures
Jan. 14, 2011
10% convertible debentures
Jun. 30, 2012
10% convertible debentures
After Amendment
Jan. 31, 2011
10% convertible debentures
After Amendment
Jan. 14, 2011
10% convertible debentures
After Amendment
Jun. 30, 2012
10% convertible debentures
After Amendment
Maximum
Jan. 14, 2011
10% convertible debentures
After Amendment
Cash Transactions
Jan. 14, 2011
10% convertible debentures
After Amendment
Non Cash
Jan. 14, 2011
10% convertible debentures
Before Amendment
Jan. 14, 2011
10% convertible debentures
Before Amendment
Non Cash
Debt Disclosure [Line Items]                              
Convertible debt, interest rate 8.00%         10.00%           15.00% 18.00%   12.00%
Proceeds from convertible debt           $ 600,000                  
Convertible debt, maturity date               Jun. 30, 2012              
Convertible debt, conversion price for interest payment                   $ 0.60       $ 0.90  
Convertible debt, conversion price                   $ 2.50       $ 2.00  
Warrant term                 3 years            
Number of shares of common stock called by warrants, percentage of outstanding principal   5.00%         5.00%                
Warrant exercise price 1.0                 0.90          
Percent difference in the present value of cash flows between the original terms and the modified terms                     10.00%        
Loss on debt extinguishment       1,400,000                      
Fair value of derivative liability     797,000   797,000     797,000              
Change in fair value of derivative     2,500   13,300                    
Principal and accrued interest repaid expense $ 772,500   $ 600,000