Description Of Business And Basis Of Presentation (Schedule Of Exchange Rates To US Dollar) (Details)	Mar. 31, 2020	Dec. 31, 2019
Canadian Dollar (CAD) [Member]
Currency [Line Items]
Ending rates	1.4187	1.2988
Euros (EUR) [Member]
Currency [Line Items]
Ending rates	0.9104	0.8906
Polish Zloty (PLN) [Member]
Currency [Line Items]
Ending rates	4.1339	3.7873
British Pound (GBP) [Member]
Currency [Line Items]
Ending rates	0.8059	0.7563