Stock based compensation, options and warrants (Schedule of Restricted Stock Activity) (Details) - Restricted Stock [Member] |
9 Months Ended |
|---|---|
|
Sep. 30, 2017
$ / shares
shares
| |
| Number of shares | |
| Beginning balance | shares | |
| Granted | shares | 422,000 |
| Vested | shares | (42,622) |
| Forfeited | shares | (40,000) |
| Ending balance | shares | 339,378 |
| Weighted Average Grant Date Fair value | |
| Beginning balance | $ / shares | |
| Granted | $ / shares | 3.69 |
| Vested | $ / shares | 3.20 |
| Forfeited | $ / shares | 3.13 |
| Ending balance | $ / shares | $ 3.75 |
| X | ||||||||||
- Definition Gross number of share options (or share units) granted during the period. No definition available.
|
| X | ||||||||||
- 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
|
| X | ||||||||||
- Definition Number of non-vested options outstanding. No definition available.
|
| X | ||||||||||
- 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.
|
| X | ||||||||||
- Definition Number of non-vested options forfeited. No definition available.
|
| X | ||||||||||
- Definition Weighted average grant-date fair value of non-vested options forfeited. No definition available.
|
| X | ||||||||||
- Definition Weighted average grant-date fair value of non-vested options outstanding. No definition available.
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Number of options vested. No definition available.
|
| X | ||||||||||
- Definition Weighted average grant-date fair value of options vested. No definition available.
|
| X | ||||||||||
- Details
|