Stockholders' Equity (Stock Option Activity) (Details) - shares |
6 Months Ended | 12 Months Ended | |
|---|---|---|---|
Mar. 26, 2018 |
Jun. 30, 2018 |
Dec. 31, 2017 |
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
| Granted | 250,000 | ||
| Stock Options [Member] | |||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
| Outstanding at Beginning of Period | 6,818,948 | 5,757,880 | |
| Granted | 300,000 | 550,000 | 3,027,500 |
| Exercised | (12,500) | (152,085) | |
| Forfeit/canceled | (1,162,319) | (1,451,053) | |
| Expired | (1,229,878) | (363,294) | |
| Outstanding at End of Period | 4,964,251 | 6,818,948 |
| 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.
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| X | ||||||||||
- Definition Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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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://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Gross number of share options (or share units) granted during the period. No definition available.
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| X | ||||||||||
- Definition Number of options outstanding, including both vested and non-vested options. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Number of share options (or share units) exercised during the current period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Details
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