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Fair Value of Financial Instruments (Details) - USD ($)	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017	Dec. 31, 2016
Assets, Carrying Value:
Cash, cash equivalents, restricted cash	$ 3,843,000	$ 2,502,000	$ 2,851,000	$ 3,121,000
Total	3,843,000	2,502,000
Liabilities, Carrying Value:
Debt obligations	4,787,000	6,057,000
Total	4,787,000	6,057,000
Assets, Fair Value:
Cash, cash equivalents, restricted cash	3,843,000	2,502,000
Total	3,843,000	2,502,000
Liabilities, Fair Value:
Debt obligations	4,768,000	6,082,000
Total	4,768,000	6,082,000
Fair Value, Inputs, Level 1 [Member]
Assets, Fair Value:
Cash, cash equivalents, restricted cash	3,843,000	2,502,000
Total	3,843,000	2,502,000
Liabilities, Fair Value:
Debt obligations	0	0
Total	0	0
Fair Value, Inputs, Level 2 [Member]
Assets, Fair Value:
Cash, cash equivalents, restricted cash	0	0
Total	0	0
Liabilities, Fair Value:
Debt obligations	0	0
Total	0	0
Fair Value, Inputs, Level 3 [Member]
Assets, Fair Value:
Cash, cash equivalents, restricted cash	0	0
Total	0	0
Liabilities, Fair Value:
Debt obligations	4,768,000	6,082,000
Total	$ 4,768,000	$ 6,082,000

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Sum of the carrying amounts as of the balance sheet date of all assets that are recognized.

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Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage. Excludes amount for disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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