Income Taxes (Narrative) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Income Tax Disclosure [Line Items]
Deferred income tax expense (benefit)		$ 0		$ 0
Income tax benefit (expense)	$ 54,000	$ 35,000	$ 183,000	$ 35,000
TRS Leasing, Inc [Member]
Income Tax Disclosure [Line Items]
Income tax benefit (expense)	54,000		$ 183,000
Combined federal and state effective tax rate			26.00%
Net operating loss carryforward for federal income tax purposes	$ 4,173,000		$ 4,173,000
TRS Leasing, Inc [Member] | Minimum [Member]
Income Tax Disclosure [Line Items]
Loss carryforwards expiration period			Dec. 31, 2027
TRS Leasing, Inc [Member] | Maximum [Member]
Income Tax Disclosure [Line Items]
Loss carryforwards expiration period			Dec. 31, 2034