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 3 Months Ended 12 Months Ended 1 Months Ended
Dec. 01, 2014
Dec. 31, 2014
Sep. 30, 2014
Feb. 04, 2014
Sep. 30, 2013
Closing price per share of common stock   $ 0.001us-gaap_CommonStockParOrStatedValuePerShare $ 0.001us-gaap_CommonStockParOrStatedValuePerShare   $ 0.001us-gaap_CommonStockParOrStatedValuePerShare
Derivative liabilities Assumptions          
Closing price per share of common stock $ 0.25us-gaap_CommonStockParOrStatedValuePerShare
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
$ 0.20us-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
 
Dividend yield 0.00%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
   
Maximum | Derivative liabilities Assumptions          
Exercise price per share $ 0.30us-gaap_FairValueAssumptionsExercisePrice
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
$ 0.30us-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 90.00%us-gaap_FairValueAssumptionsExpectedVolatilityRate
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
85.00%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 1.39%us-gaap_FairValueAssumptionsRiskFreeInterestRate
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
1.51%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
 
Remaining expected term of underlying securities (years) 4 years 1 month 28 days 4 years 29 days 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
$ 0.30us-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 0.01%us-gaap_FairValueAssumptionsRiskFreeInterestRate
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
0.03%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) 29 days 0 years 3 months 29 days 1 year