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Convertible Notes Payable (Parenthetical) (Detail) - USD ($)
3 Months Ended
Jun. 30, 2015
Mar. 31, 2015
Debt Instrument [Line Items]    
Debt discount $ 995,363 $ 1,060,401
Debt instrument, maturity date Mar. 28, 2019  
9% Senior Subordinated Convertible Notes due February 15, 2016    
Debt Instrument [Line Items]    
Debt, interest rate 9.00% 9.00%
Debt discount $ 43,472 $ 62,182
Debt instrument, maturity date Feb. 15, 2016  
8% Convertible Note Payable to NNA due March 28, 2019    
Debt Instrument [Line Items]    
Debt, interest rate 8.00% 8.00%
Debt discount $ 951,040 $ 985,255
Debt instrument, maturity date Mar. 28, 2019