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Intangible Assets (Schedule of Company's Intangible Assets) (Details) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Unamortized intangible assets: |  |  |
Goodwill, Gross Carrying Amount | [1] | $ 14,489 | $ 14,489
Goodwill, Accumulated Amortization | [1] | (227) | (227)
Total intangible assets |  | 23,205 | 23,205
Accumulated Amortization |  | (5,735) | (5,520)
Customer Lists [Member] |  |  |
Assets eligible for amortization: |  |  |
Gross Carrying Amount |  | 4,778 | 4,778
Accumulated Amortization |  | (4,012) | (3,902)
Patents [Member] |  |  |
Assets eligible for amortization: |  |  |
Gross Carrying Amount |  | 72 | 72
Accumulated Amortization |  | (25) | (24)
Non-compete Agreements [Member] |  |  |
Assets eligible for amortization: |  |  |
Gross Carrying Amount |  | 332 | 332
Accumulated Amortization |  | (332) | (332)
Software [Member] |  |  |
Assets eligible for amortization: |  |  |
Gross Carrying Amount |  | 2,844 | 2,844
Accumulated Amortization |  | (824) | (731)
Trade Name [Member] |  |  |
Assets eligible for amortization: |  |  |
Gross Carrying Amount |  | 190 | 190
Accumulated Amortization |  | (15) | (13)
Other [Member] |  |  |
Assets eligible for amortization: |  |  |
Gross Carrying Amount |  | 500 | 500
Accumulated Amortization |  | $ (300) | $ (291)
[1] | Amortization through December 31, 2001 prior to adoption of FASB ASC 350.

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