Intangible Assets (Schedule of Company's Intangible Assets) (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Unamortized intangible assets:
Goodwill, Gross Carrying Amount	$ 14,262	$ 14,262
Goodwill, Accumulated Amortization
Total intangible assets	22,646	22,646
Accumulated Amortization	(5,391)	(4,961)
Customer Lists [Member]
Assets eligible for amortization:
Gross Carrying Amount	4,778	4,778
Accumulated Amortization	(4,122)	(3,902)
Patents [Member]
Assets eligible for amortization:
Gross Carrying Amount	72	72
Accumulated Amortization	(26)	(24)
Software [Member]
Assets eligible for amortization:
Gross Carrying Amount	2,844	2,844
Accumulated Amortization	(918)	(731)
Trade Name [Member]
Assets eligible for amortization:
Gross Carrying Amount	190	190
Accumulated Amortization	(17)	(13)
Other [Member]
Assets eligible for amortization:
Gross Carrying Amount	500	500
Accumulated Amortization	$ (308)	$ (291)