Stock-Based Compensation (Summary Of Unvested Shares) (Details) - Stock Option [Member] |
12 Months Ended |
|---|---|
|
Dec. 31, 2017
$ / shares
shares
| |
| Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items] | |
| Number of Options, Granted | 483,260 |
| Nonvested Options [Member] | |
| Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items] | |
| Number of Options, Unvested | 897,123 |
| Number of Options, Granted | 483,260 |
| Number of Options, Vested | (489,235) |
| Number of Options, Cancelled | (163,605) |
| Number of Options, Unvested | 727,543 |
| Weighted Average Fair Value at Grant Date, Unvested | $ / shares | $ 3.21 |
| Weighted Average Fair Value at Grant Date, Granted | $ / shares | 1.53 |
| Weighted Average Fair Value at Grant Date, Vested | $ / shares | 3.11 |
| Weighted Average Fair Value at Grant Date, Cancelled | $ / shares | 2.25 |
| Weighted Average Fair Value at Grant Date, Unvested | $ / shares | $ 2.39 |
| X | ||||||||||
- 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.
|
| 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 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 | ||||||||||
- Definition Number of options vested. No definition available.
|
| X | ||||||||||
- Definition Weighted average grant-date fair value of options vested. No definition available.
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|