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Disposition of Assets (Narrative) (Details) - USD ($) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018 | Dec. 31, 2018
Income Statement [Abstract] |  |  |  |  |
Loss from discontinued operation, net of income taxes | $ 0 | $ (523,000) | $ 0 | $ (1,010,000) |
From discontinued operation (in US dollars per share) | $ 0 | $ (0.01) | $ 0 | $ (0.02) |
UNITED KINGDOM | Discontinued Operations [Member] | United Kingdom Construction [Member] |  |  |  |  |
Income Statement [Abstract] |  |  |  |  |
Revenues |  | $ 0 |  | $ 0 |
Loss from discontinued operation, net of income taxes |  | $ (523,000) |  | $ (1,010,000) |
From discontinued operation (in US dollars per share) |  | $ (0.01) |  | $ (0.02) |
Current liabilities | $ 0 |  | $ 0 |  | $ 3,700,000

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