Significant Accounting Policies (Schedule Of Exchange Rates To US Dollar) (Details)	12 Months Ended
	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%)