Stock-based compensation - Summary of Status of Company's Restricted Stock Option Activity (Details) - $ / shares |
3 Months Ended | 9 Months Ended |
|---|---|---|
Sep. 30, 2017 |
Sep. 30, 2017 |
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| Number of Shares | ||
| Granted (in shares) | 0 | 960,000 |
| Cancelled, expired, or forfeited (in shares) | (674,977) | |
| Weighted Average Exercise Price | ||
| Beginning balance (in dollars per share) | $ 4.28 | |
| Granted (in dollars per share) | 2.13 | |
| Cancelled, expired, or forfeited (in dollars per share) | 3.24 | |
| Ending balance (in dollars per share) | $ 3.65 | $ 3.65 |
| Restricted Stock | ||
| Number of Shares | ||
| Beginning balance (in shares) | 716,250 | |
| Granted (in shares) | 410,000 | |
| Vested (in shares) | (81,750) | |
| Cancelled, expired, or forfeited (in shares) | (169,500) | |
| Ending balance (in shares) | 875,000 | 875,000 |
| Weighted Average Exercise Price | ||
| Beginning balance (in dollars per share) | $ 2.73 | |
| Granted (in dollars per share) | 2.13 | |
| Vested (in dollars per share) | 2.73 | |
| Cancelled, expired, or forfeited (in dollars per share) | 2.73 | |
| Ending balance (in dollars per share) | $ 2.45 | $ 2.45 |
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- Definition The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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 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 Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. 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 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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