Revenue Recognition (Schedule Of Contract Assets And Liabilities) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Opening [Member]
Contract Receivables and Liabilities [Line Items]
Receivables	$ 638	$ 586	$ 1,351	$ 1,269
Contract Liabilities	2,185	2,937	2,417	2,986
Closing [Member]
Contract Receivables and Liabilities [Line Items]
Receivables	652	749	652	749
Contract Liabilities	3,706	2,842	3,706	2,842
Decrease [Member]
Contract Receivables and Liabilities [Line Items]
Receivables	14	163	(699)	(520)
Contract Liabilities	$ 1,521	$ (95)	$ 1,289	$ (144)