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Stock Options (Schedule Of Options Issued) (Details) - $ / shares | 12 Months Ended |
--- | --- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Options Issued | 10,000 | 10,000 | 7,500 |
Exercise Price | $ 6.10 | $ 5.70 | $ 5.90 | $ 6.10
$2.50 [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Exercise Price | 2.50 |  |  |
$2.30 [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Exercise Price | 2.30 |  |  |
$2.70 [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Exercise Price | 2.70 |  |  |
$2.20 [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Exercise Price | 2.20 |  |  |
$2.50 [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Exercise Price | $ 2.50 |  |  |
Grant Date | Jan. 05, 2015 |  |  |
Expiration Date | Jan. 04, 2020 |  |  |
$2.50 [Member] | Non-Executive Director [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Options Issued | 625 |  |  |
$2.50 [Member] | Executive Directors [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Options Issued | 2,500 |  |  |
$2.30 [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Exercise Price | $ 2.30 |  |  |
Grant Date | Apr. 01, 2015 |  |  |
Expiration Date | Mar. 31, 2020 |  |  |
$2.30 [Member] | Non-Executive Director [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Options Issued | 625 |  |  |
$2.30 [Member] | Executive Directors [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Options Issued | 2,500 |  |  |
$2.70 [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Exercise Price | $ 2.70 |  |  |
Grant Date | Jul. 02, 2015 |  |  |
Expiration Date | Jul. 01, 2020 |  |  |
$2.70 [Member] | Non-Executive Director [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Options Issued | 625 |  |  |
$2.70 [Member] | Executive Directors [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Options Issued | 2,500 |  |  |
$2.20 [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Exercise Price | $ 2.20 |  |  |
Grant Date | Oct. 02, 2015 |  |  |
Expiration Date | Oct. 01, 2020 |  |  |
$2.20 [Member] | Non-Executive Director [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Options Issued | 625 |  |  |
$2.20 [Member] | Executive Directors [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Options Issued | 2,500 |  |  |

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