Revenue Recognition (Schedule Of Contract Assets And Liabilities) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Opening [Member]
Contract Receivables and Liabilities [Line Items]
Receivables	$ 1,103	$ 326
Contract Liabilities	2,200	663
Closing [Member]
Contract Receivables and Liabilities [Line Items]
Receivables	1,269	1,103
Contract Liabilities	2,986	2,200
Increase/(Decrease) [Member]
Contract Receivables and Liabilities [Line Items]
Receivables	166	777
Contract Liabilities	$ 786	$ 1,537