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Summary Of Significant Accounting Policies (Reconciliation of Net Income (Loss) Reported in Financial Statements and Federal Tax Return) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Summary of Significant Accounting Policies [Abstract]    
Net income per financial statements $ 473us-gaap_NetIncomeLoss $ 3,799us-gaap_NetIncomeLoss
Adjustment to depreciation expense 147us-gaap_IncomeTaxReconciliationNondeductibleExpenseDepreciation 263us-gaap_IncomeTaxReconciliationNondeductibleExpenseDepreciation
Provision for doubtful accounts (142)zzhja_IncomeTaxReconciliationProvisionForDoubtfulAccounts 16zzhja_IncomeTaxReconciliationProvisionForDoubtfulAccounts
Adjustments to gain on sales of assets 112us-gaap_IncomeTaxReconciliationDispositionOfAssets 669us-gaap_IncomeTaxReconciliationDispositionOfAssets
Other (2)us-gaap_IncomeTaxReconciliationOtherAdjustments 61us-gaap_IncomeTaxReconciliationOtherAdjustments
Income per Federal tax return (unaudited) $ 588zzhja_IncomeOrLossPerFederalTaxReturn $ 4,808zzhja_IncomeOrLossPerFederalTaxReturn