Revenue Recognition (Schedule Of Contract Assets And Liabilities) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Opening [Member]
Contract Receivables and Liabilities [Line Items]
Receivables	$ 586	$ 472	$ 1,269	$ 1,103
Contract Liabilities	2,937	2,227	2,986	2,200
Closing [Member]
Contract Receivables and Liabilities [Line Items]
Receivables	749	739	749	739
Contract Liabilities	2,842	2,769	2,842	2,769
Increase/(Decrease) [Member]
Contract Receivables and Liabilities [Line Items]
Receivables	163	267	(520)	(364)
Contract Liabilities	$ (95)	$ 542	$ (144)	$ 569