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Significant Accounting Policies (Schedule Of Exchange Rates To US Dollar) (Details) | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Canadian Dollar (CAD) [Member] |  |  |
Currency [Line Items] |  |  |
Ending Rates | 1.3232 | 1.3550 |
Average Rates | 1.3496 | 1.3011 | 1.2537
Average Rates % Change | (3.70%) | (3.80%) |
Euros (EUR) [Member] |  |  |
Currency [Line Items] |  |  |
Ending Rates | 0.9030 | 0.9393 |
Average Rates | 0.9248 | 0.9506 | 0.8456
Average Rates % Change | 2.70% | (12.40%) |
Polish Zloty (PLN) [Member] |  |  |
Currency [Line Items] |  |  |
Ending Rates | 3.9155 | 4.4004 |
Average Rates | 4.2034 | 4.4559 | 3.8608
Average Rates % Change | 5.70% | (15.40%) |

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