Significant Accounting Policies (Schedule Of Exchange Rates To US Dollar) (Details)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Canadian Dollar (CAD) [Member]
Currency [Line Items]
Ending Rates	1.3550	1.2678
Average Rates	1.3011	1.2537	1.3412
Average Rates % Change	(3.80%)	6.50%
Euros (EUR) [Member]
Currency [Line Items]
Ending Rates	0.9393	0.8810
Average Rates	0.9506	0.8456	0.8776
Average Rates % Change	(12.40%)	3.60%
Polish Zloty (PLN) [Member]
Currency [Line Items]
Ending Rates	4.4004	4.0492
Average Rates	4.4559	3.8608	3.8989
Average Rates % Change	(15.40%)	1.00%
British Pound (GBP) [Member]
Currency [Line Items]
Average Rates		0.7270	0.7798
Average Rates % Change		6.80%