Stock based compensation, options and warrants (Schedule of Nonvested Awards) (Details) - Stock Incentive Plan [Member] |
9 Months Ended |
|---|---|
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Sep. 30, 2017
$ / shares
shares
| |
| Nonvested Shares Underlying Options | |
| Beginning balance | shares | 97,738 |
| Granted | shares | 20,000 |
| Vested | shares | (30,905) |
| Forfeited | shares | (57,000) |
| Ending balance | shares | 29,833 |
| Weighted Average Exercise Price | |
| Beginning balance | $ 3.51 |
| Granted | 4.02 |
| Vested | 4.92 |
| Forfeited | 2.92 |
| Ending balance | 3.54 |
| Weighted Average Grant Date Fair Value | |
| Beginning balance | 2.58 |
| Granted | 3.04 |
| Vested | 3.57 |
| Forfeited | 2.16 |
| Ending balance | $ 2.67 |
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- Definition Weighted average exercise price of share-based payment awards that vested during the period. No definition available.
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- Definition Weighted average exercise price of nonvested options outstanding. No definition available.
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- Definition Gross number of share options (or share units) granted during the period. No definition available.
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- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- References No definition available.
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- Definition Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated. No definition available.
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- Definition Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options. No definition available.
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- Definition Number of non-vested options outstanding. No definition available.
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available.
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- Definition Number of non-vested options forfeited. No definition available.
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- Definition Weighted average grant-date fair value of non-vested options forfeited. No definition available.
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- Definition Weighted average grant-date fair value of non-vested options outstanding. No definition available.
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- References No definition available.
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- Definition Number of options vested. No definition available.
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- Definition Weighted average grant-date fair value of options vested. No definition available.
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- Details
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