Income Taxes (Details Textual) - USD ($)  | 
3 Months Ended | 6 Months Ended | 9 Months Ended | |||
|---|---|---|---|---|---|---|
Sep. 30, 2018  | 
Mar. 31, 2018  | 
Sep. 30, 2017  | 
Sep. 30, 2018  | 
Sep. 30, 2017  | 
Dec. 31, 2017  | 
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| Income Tax Disclosure [Abstract] | ||||||
| Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent | 21.00% | 34.00% | ||||
| Deferred Tax Assets, Gross | $ 37,000,000 | $ 37,000,000 | ||||
| Deferred Tax Assets, Valuation Allowance | 37,000,000 | 37,000,000 | ||||
| Deferred Tax Assets, Tax Credit Carryforwards, Alternative Minimum Tax | 697,000 | $ 697,000 | 697,000 | |||
| Income tax benefit (expense) | $ (10,000) | $ (13,000) | $ (10,000) | $ (25,000) | ||
| Effective tax rate | (0.53%) | (1.07%) | ||||
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible alternative minimum tax credit carryforwards. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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| X | ||||||||||
- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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| X | ||||||||||
- Definition Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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| X | ||||||||||
- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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| X | ||||||||||
- References No definition available. 
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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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