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Convertible Revolving Credit Agreement - Additional Information (Detail) (USD $)
1 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Mar. 31, 2012
Jun. 30, 2012
Jun. 30, 2011
Dec. 31, 2011
Apr. 30, 2011
Jun. 30, 2012
Revolving Credit Agreement
Jun. 30, 2012
Revolving Credit Agreement
Dec. 31, 2011
Revolving Credit Agreement
Dec. 31, 2011
Redeemable Common Stock
Debt Disclosure [Line Items]                  
Revolving credit facility, maximum agreed amount of loan       $ 2,000,000       $ 2,000,000  
Revolving credit facility, interest rate               12.00%  
Shares of restricted redeemable common stock issued         759,773       250,000
Amortization of discount on revolving credit agreement     $ 298,400     $ 203,471 $ 305,206    
Shares of common stock reclassified to permanent equity 6,250 250,000