|
Weighted Average Estimated Fair Value of Warrant Issued (Detail)
|
9 Months Ended |
|---|---|
|
Sep. 30, 2012
|
|
|
Warrant Issue Price $0.62 Per Share [Member]
|
|
| Debt Instrument [Line Items] | |
| Expected volatility | 128.00% |
| Risk-free interest rate | 0.31% |
| Expected life | 2 years |
| Dividend yield | 0.00% |
|
Warrant Issue Price $0.81 Per Share [Member]
|
|
| Debt Instrument [Line Items] | |
| Expected volatility | 133.00% |
| Risk-free interest rate | 0.36% |
| Expected life | 3 years |
| Dividend yield | 0.00% |