Post-effective amendment to a registration statement that is not immediately effective upon filing

Assumptions Used For Derivative Liability (Detail)

v2.4.1.9
Assumptions Used For Derivative Liability (Detail) (USD $)
0 Months Ended 1 Months Ended 6 Months Ended 12 Months Ended 1 Months Ended
Mar. 15, 2015
Mar. 31, 2015
Mar. 31, 2015
Sep. 30, 2014
Feb. 04, 2014
Sep. 30, 2013
Stated interest rate 8.00%us-gaap_DebtInstrumentInterestRateStatedPercentage 8.00%us-gaap_DebtInstrumentInterestRateStatedPercentage 8.00%us-gaap_DebtInstrumentInterestRateStatedPercentage      
Closing price per share of common stock   $ 0.001us-gaap_CommonStockParOrStatedValuePerShare $ 0.001us-gaap_CommonStockParOrStatedValuePerShare $ 0.001us-gaap_CommonStockParOrStatedValuePerShare   $ 0.001us-gaap_CommonStockParOrStatedValuePerShare
Exercise price per share $ 0.20us-gaap_FairValueAssumptionsExercisePrice $ 0.20us-gaap_FairValueAssumptionsExercisePrice $ 0.20us-gaap_FairValueAssumptionsExercisePrice      
Remaining expected term of underlying securities (years) 1 year 11 months 16 days        
Derivative liabilities Assumptions            
Stated interest rate 8.00%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
8.00%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
8.00%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
     
Closing price per share of common stock $ 0.21us-gaap_CommonStockParOrStatedValuePerShare
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
$ 0.18us-gaap_CommonStockParOrStatedValuePerShare
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
$ 0.18us-gaap_CommonStockParOrStatedValuePerShare
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
$ 0.18us-gaap_CommonStockParOrStatedValuePerShare
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
$ 0.30us-gaap_CommonStockParOrStatedValuePerShare
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
 
Exercise price per share $ 0.20us-gaap_FairValueAssumptionsExercisePrice
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
$ 0.20us-gaap_FairValueAssumptionsExercisePrice
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
$ 0.20us-gaap_FairValueAssumptionsExercisePrice
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
     
Expected volatility 90.00%us-gaap_FairValueAssumptionsExpectedVolatilityRate
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
90.00%us-gaap_FairValueAssumptionsExpectedVolatilityRate
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
       
Risk-free interest rate 0.24%us-gaap_FairValueAssumptionsRiskFreeInterestRate
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
0.25%us-gaap_FairValueAssumptionsRiskFreeInterestRate
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
       
Credit adjusted discount rate 20.00%us-gaap_FairValueAssumptionsExpectedDividendRate
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
20.00%us-gaap_FairValueAssumptionsExpectedDividendRate
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
0.00%us-gaap_FairValueAssumptionsExpectedDividendRate
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
0.00%us-gaap_FairValueAssumptionsExpectedDividendRate
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
   
Remaining expected term of underlying securities (years) 1 year 11 months 16 days        
Maximum | Derivative liabilities Assumptions            
Exercise price per share $ 0.30us-gaap_FairValueAssumptionsExercisePrice
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
    $ 0.40us-gaap_FairValueAssumptionsExercisePrice
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
$ 0.40us-gaap_FairValueAssumptionsExercisePrice
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
 
Expected volatility 110.00%us-gaap_FairValueAssumptionsExpectedVolatilityRate
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
  90.00%us-gaap_FairValueAssumptionsExpectedVolatilityRate
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
90.00%us-gaap_FairValueAssumptionsExpectedVolatilityRate
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
125.00%us-gaap_FairValueAssumptionsExpectedVolatilityRate
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
 
Risk-free interest rate 1.41%us-gaap_FairValueAssumptionsRiskFreeInterestRate
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
  1.19%us-gaap_FairValueAssumptionsRiskFreeInterestRate
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
1.55%us-gaap_FairValueAssumptionsRiskFreeInterestRate
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
1.46%us-gaap_FairValueAssumptionsRiskFreeInterestRate
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
 
Credit adjusted discount rate 0.00%us-gaap_FairValueAssumptionsExpectedDividendRate
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
         
Remaining expected term of underlying securities (years) 4 years 3 months 18 days   4 years 3 months 4 years 3 months 29 days 5 years  
Minimum | Derivative liabilities Assumptions            
Exercise price per share $ 0.20us-gaap_FairValueAssumptionsExercisePrice
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
$ 0.20us-gaap_FairValueAssumptionsExercisePrice
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
$ 0.20us-gaap_FairValueAssumptionsExercisePrice
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
$ 0.30us-gaap_FairValueAssumptionsExercisePrice
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
$ 0.30us-gaap_FairValueAssumptionsExercisePrice
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
 
Expected volatility 80.00%us-gaap_FairValueAssumptionsExpectedVolatilityRate
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
  80.00%us-gaap_FairValueAssumptionsExpectedVolatilityRate
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
85.00%us-gaap_FairValueAssumptionsExpectedVolatilityRate
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
100.00%us-gaap_FairValueAssumptionsExpectedVolatilityRate
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
 
Risk-free interest rate 0.03%us-gaap_FairValueAssumptionsRiskFreeInterestRate
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
  0.04%us-gaap_FairValueAssumptionsRiskFreeInterestRate
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
0.02%us-gaap_FairValueAssumptionsRiskFreeInterestRate
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
0.012%us-gaap_FairValueAssumptionsRiskFreeInterestRate
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
 
Remaining expected term of underlying securities (years) 2 months 19 days   2 months 1 day 3 months 29 days 1 year