Stockholders' Equity - Outstanding Warrants Valuation Assumption (Detail) - February 2015 Warrants - $ / shares |
6 Months Ended | 12 Months Ended |
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Jun. 30, 2017 |
Dec. 31, 2016 |
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| Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] | ||
| Risk-free interest rate | 1.55% | 1.93% |
| Expected life (in years) | 2 years 7 months 21 days | 3 years 1 month 16 days |
| Dividend yield | 0.00% | 0.00% |
| Volatility | 147.00% | 135.00% |
| Stock price | $ 0.39 | $ 0.44 |
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- 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.
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- 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
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- 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
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- 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
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- Definition Risk-free interest rate assumption used in valuing an instrument. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Price of a single share of a number of saleable stocks of a company. No definition available.
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- Details
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