Net Intangible Assets (Schedule of Finite Lived Intangible Assets) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 150	$ 1,628
Accumulated Amortization	150	1,590
Net Carrying Amount	0	38
Amortization expense	$ 38	$ 190
HazardPro Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Average Useful Life		7 years
Gross Carrying Amount		$ 1,478
Accumulated Amortization		1,478
Net Carrying Amount		$ 0
Communication Technolog [Member]
Finite-Lived Intangible Assets [Line Items]
Average Useful Life	3 years	3 years
Gross Carrying Amount	$ 150	$ 150
Accumulated Amortization	150	112
Net Carrying Amount	$ 0	$ 38