Segment, Geographic Information and Revenue Disaggregation (Schedule of Segment Reporting) (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($) segment	Sep. 30, 2021 USD ($)
Segment Reporting Information [Line Items]
Total revenues	$ 6,186	$ 3,395	$ 15,293	$ 9,378
Number of segments | segment			1
U.S.
Segment Reporting Information [Line Items]
Total revenues	5,039	2,572	$ 12,035	6,289
Germany
Segment Reporting Information [Line Items]
Total revenues	933	682	2,744	2,589
Other countries
Segment Reporting Information [Line Items]
Total revenues	$ 214	$ 141	$ 514	$ 500