Stock based compensation, options and warrants (Schedule of Restricted Stock Activity) (Details) - Restricted Stock [Member] |
3 Months Ended |
|---|---|
|
Mar. 31, 2019
$ / shares
shares
| |
| Number of shares | |
| Unvested beginning balance | shares | 95,939 |
| Vested | shares | (22,397) |
| Forfeited | shares | (40,000) |
| Unvested ending balance | shares | 33,542 |
| Weighted Average Grant Date Fair value | |
| Unvested beginning balance | $ / shares | $ 12.49 |
| Vested | $ / shares | 9.37 |
| Forfeited | $ / shares | 16.82 |
| Unvested ending balance | $ / shares | $ 9.39 |
| 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
|