Assumptions used in Estimating Fair Value of Warrant Derivative Liability (Detail) - $ / shares |
6 Months Ended | 9 Months Ended | |
|---|---|---|---|
Sep. 15, 2016 |
Nov. 30, 2016 |
Feb. 28, 2017 |
|
| Derivative [Line Items] | |||
| Fair value of underlying stock | $ 0.78 | $ 0.67 | $ 0.71 |
| Risk free rate | 1.20% | 1.81% | 1.85% |
| Expected term (in years) | 5 years | 4 years 9 months 15 days | 4 years 6 months 15 days |
| Stock price volatility | 106.00% | 103.00% | 101.00% |
| Expected dividend yield | 0.00% | 0.00% | 0.00% |
| Probability of Fundamental Transaction | 50.00% | 50.00% | 50.00% |
| Probability of holder requesting cash payment | 50.00% | 50.00% | 50.00% |
| X | ||||||||||
- Definition Fair Value Inputs, Probability of Fundamental Transaction No definition available.
|
| X | ||||||||||
- Definition Fair Value Inputs, Probability of Holder Requesting Cash Payment No definition available.
|
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
| X | ||||||||||
- Definition Agreed upon price for the exchange of the underlying asset. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Expected dividends to be paid to holders of the underlying shares or financial instruments (expressed as a percentage of the share or instrument's price). Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Period the instrument, asset or liability is expected to be outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Measure of dispersion, in percentage terms (for instance, the standard deviation or variance), for a given stock price. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Risk-free interest rate assumption used in valuing an instrument. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|