Revenue Recognition (Summary Of Revenue Performance Obligations) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Performance Obligations
Revenues	$ 20,820	$ 12,391	$ 53,245	$ 42,411
Percent of Revenues	100.00%	100.00%	100.00%	100.00%
Revenue recognized over time [Member]
Performance Obligations
Revenues	$ 546	$ 403	$ 1,101	$ 1,041
Percent of Revenues	3.00%	3.00%	2.00%	2.00%
Revenue recognized at a point in time [Member]
Performance Obligations
Revenues	$ 20,274	$ 11,988	$ 52,144	$ 41,370
Percent of Revenues	97.00%	97.00%	98.00%	98.00%