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Disposition of Assets (Narrative) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Income Statement [Abstract]
Loss from discontinued operation, net of income taxes	$ 0	$ (205,000)	$ 0	$ (487,000)
From discontinued operation (in US dollars per share)	$ 0	$ 0.00	$ 0	$ (0.01)
UNITED KINGDOM | Discontinued Operations [Member] | United Kingdom Construction [Member]
Income Statement [Abstract]
Revenues		$ 0		$ 0
Loss from discontinued operation, net of income taxes		$ (205,000)		$ (487,000)
From discontinued operation (in US dollars per share)		$ 0.00		$ (0.01)
Current liabilities	$ 0		$ 0		$ 3,700,000

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