Commitments And Contingencies (Expense Associated With Operating Leases) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Cost Of Revenue [Member]
Lessee, Lease, Description [Line Items]
Operating rent expense	$ 24	$ 20
Variable rent expense	15	10
Research And Development [Member]
Lessee, Lease, Description [Line Items]
Operating rent expense	6	7
Variable rent expense	3	6
Sales And Marketing [Member]
Lessee, Lease, Description [Line Items]
Operating rent expense	2	9
Variable rent expense	2	9
General And Administrative [Member]
Lessee, Lease, Description [Line Items]
Operating rent expense	21	16
Variable rent expense	$ 21	$ 18