Commitments And Contingencies (Schedule Of Information Related To Right-Of-Use Assets And Lease Liabilities) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Commitments And Contingencies [Abstract]
Cash paid for operating lease liabilities	$ 671
Operating lease liabilities arising from ROU assets including impact of ASC 842 adoption	4,833
Current operating lease liabilities	457
Non-current operating lease liabilities	10,991	$ 6,719
Total lease liabilities	$ 11,448
Weighted average remaining lease term	9 years 29 days
Weighted average discount rate	10.00%