Net Intangible Assets (Schedule of Finite Lived Intangible Assets) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 1,628	$ 1,628
Accumulated Amortization	1,590	1,400
Net Carrying Amount	38	228
Amortization expense	$ 190	$ 261
Unpatented Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Average Useful Life	7 years	7 years
Gross Carrying Amount	$ 1,478	$ 1,478
Accumulated Amortization	1,478	1,337
Net Carrying Amount	$ 0	$ 141
Communication Technolog [Member]
Finite-Lived Intangible Assets [Line Items]
Average Useful Life	3 years	3 years
Gross Carrying Amount	$ 150	$ 150
Accumulated Amortization	112	63
Net Carrying Amount	$ 38	$ 87