Condensed Consolidated Balance Sheets (Current Period Unaudited) Condensed Consolidated Balance Sheets (Current Period Unaudited) [Abstract] ASSETS ASSETS [Abstract] REAL ESTATE REAL ESTATE [Abstract] Rental property: Rental property: [Abstract] Land Building and improvements Machinery and equipment Gross amount of real estate property, excluding land held for development. Less accumulated depreciation Amount of real estate property, excluding land held for development, net of accumulated depreciation. Land held for development: Land held for development: [Abstract] Carrying cost of land held for development. Land Accumulated land development costs capitalized on land held for development. Land development costs Total real estate, net Cash and cash equivalents Investment in marketable securities Rent receivable, net of allowance for doubtful accounts of $60,000 and $103,000, respectively Deferred rent receivable Prepaid expenses and other assets Prepaid pension costs Total Assets LIABILITIES AND STOCKHOLDERS’ EQUITY LIABILITIES AND STOCKHOLDERS’ EQUITY [Abstract] LIABILITIES: LIABILITIES: [Abstract] Accounts payable Accrued liabilities Deferred rent liability Tenant security deposits payable Mortgage loans payable Deferred income taxes Total Liabilities Commitments and contingencies STOCKHOLDERS’ EQUITY: STOCKHOLDERS’ EQUITY: [Abstract] Common stock, $1 par value; authorized 4,000,000 shares; 1,723,888 shares issued; 1,482,680 shares outstanding Additional paid-in capital Accumulated other comprehensive income Balance of undistributed income Balance of undistributed income Less cost of shares of common stock held in treasury; 241,208 Total Stockholders’ Equity Total Liabilities and Stockholders’ Equity Allowance for doubtful accounts (in Dollars) Common stock, par value (in Dollars per share) Common stock, shares authorized (in Shares) Common stock, shares issued (in Shares) Common stock, shares outstanding (in Shares) Less common stock held in treasury, shares (in Shares) Condensed Consolidated Statements of Operations (Unaudited) Condensed Consolidated Statements of Operations (Unaudited) [Abstract] Revenues Revenues [Abstract] Rental income Rental income - tenant reimbursements Total Expenses Expenses [Abstract] Rental expenses General and administrative expenses Depreciation Total Other Income (Expense): Other Income (Expense): [Abstract] Interest income Interest expense Total Net loss before condemnation income and provision for income taxes Net Loss before Condemnation Income and Provision for Income Taxes Income (expense) on condemnation Income (expense) on condemnation Interest income on condemnation Interest income on condemnation Net Income (Loss) before Provision for Income Taxes Provision for Income Taxes Net Income (Loss) Net income (loss) per common share: Net income (loss) per common share: [Abstract] Basic and diluted (in Dollars per share) Weighted average number of common shares outstanding: Weighted average number of common shares outstanding: [Abstract] Basic and diluted (in Shares) Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) [Abstract] Net Income (loss) Other comprehensive income: Other comprehensive income: [Abstract] Unrealized gain on investments Recognition of unrealized gain on interest rate swap Other comprehensive income Comprehensive income (loss) Condensed Consolidated Statements of Cash Flows (Unaudited) Condensed Consolidated Statements of Cash Flows (Unaudited) [Abstract] CASH FLOWS FROM OPERATING ACTIVITIES: CASH FLOWS FROM OPERATING ACTIVITIES: [Abstract] Net income (loss) Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities: Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities: [Abstract] Depreciation and amortization Bad debt expense Net periodic pension benefit income Changes in operating assets and liabilities: Changes in operating assets and liabilities: [Abstract] (Increase) decrease in assets: (Increase) decrease in assets: [Abstract] Rent receivable Increase (decrease) in deferred rent receivable Deferred rent receivable Prepaid expenses and other assets Increase (decrease) in liabilities: Increase (decrease) in liabilities: [Abstract] Accounts payable Accrued liabilities Deferred rent liability Tenant security deposits Deferred income taxes Total adjustments Net cash provided by (used in) operating activities CASH FLOWS FROM INVESTING ACTIVITIES: CASH FLOWS FROM INVESTING ACTIVITIES: [Abstract] Purchase of building improvements and equipment Land development costs Purchases of marketable securities Principal repayments on investment in marketable securities Net cash used in investing activities CASH FLOWS FROM FINANCING ACTIVITIES: CASH FLOWS FROM FINANCING ACTIVITIES: [Abstract] Principal payments on mortgage loans payable Loan origination fees paid Proceeds from escrow. Proceeds from escrow Issuance of common shares, net Proceeds from other equity transactions, net Net cash (used in) provided by financing activities Net increase in cash and cash equivalents Cash and cash equivalents at beginning of period Cash and cash equivalents at end of period Supplemental cash flow information: Supplemental cash flow information: [Abstract] Interest paid Note 1 - The Company Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Note 2 - Basis of Quarterly Presentations Basis of Accounting [Text Block] Note 3 - Principles of Consolidation Consolidation, Policy [Policy Text Block] Note 4 - Investment in Marketable Securities Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Note 5 - Earnings per Share Earnings Per Share [Text Block] Note 6 - Income Taxes Income Tax Disclosure [Text Block] Note 7 - Mortgage Loans Payable Mortgage Loans on Real Estate, by Loan Disclosure [Text Block] Note 8 - Retirement Plans Pension and Other Postretirement Benefits Disclosure [Text Block] Note 9 - Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Note 10 - Recent Accounting Pronouncements Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block] Note 11 - Fair Value of Financial Instruments Fair Value Disclosures [Text Block] Note 12 - Risk Management - Use of Derivative Instruments Derivative Instruments and Hedging Activities Disclosure [Text Block] Note 13 - Accumulated Other Comprehesive Income (Loss) Comprehensive Income (Loss) Note [Text Block] Note 14 - Condemnation Legal Matters and Contingencies [Text Block] Note 15 - Reclassifications Reclassifications [Text Block] 16 - Subsequent Events Subsequent Events [Text Block] Schedule of Available-for-sale Securities Reconciliation [Table Text Block] Schedule of Condemnation Proceeds [Table Text Block] Schedule of Debt [Table Text Block] Schedule of Net Benefit Costs [Table Text Block] Summary of other commitments and contingencies (employment contracts with severance commitment contingencies) Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] Employment Agreements Contingencies [Table Text Block] Fair Value Measurements, Recurring and Nonrecurring [Table Text Block] Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Historical Cost and Estimated Fair Value of Available for Sale Securities Historical Cost and Estimated Fair Value of Available for Sale Securities [Abstract] Investment [Domain] Mortgage-backed Securities Mortgage-backed Securities Mortgage-backed Securities Breakdown of the Condemnation Proceeds Breakdown of the Condemnation Proceeds [Abstract] Condemnation [Domain] Gross gain from condemnation Gross gain from condemnation Interest income on condemnation Reimbursement of condemnation expenses Reimbursement of condemnation expenses Total condemnation proceeds Total Total income tax provision on condemnation Total Mortgage Loans Payable Mortgage Loans Payable [Abstract] Mortgage Loans on Real Estate, Loan Category [Domain] Mortgage payable Components of Net Periodic Pension Benefit Cost Components of Net Periodic Pension Benefit Cost [Abstract] Pension Benefits Pension Benefits [Abstract] Service Cost Interest Cost Expected Return on Plan Assets Amortization of prior service costs Amortization of Actuarial Loss Net Periodic Pension Benefit (Income) Cost After Curtailments and Settlements (Income) Cost After Curtailments and Settlements [Abstract] Lease Revenue Commitments Lease Revenue Commitments [Abstract] 2013 2014 2015 2016 2017 Thereafter Other Commitments and Contingencies Other Commitments and Contingencies [Abstract] Employment agreement with severance commitment contingencies Carrying Value and Fair Value of Financial Assets and Liabilities Carrying Value and Fair Value of Financial Assets and Liabilities [Abstract] Investment in Marketable Securities Investment in Marketable Securities Accumulated Other Comprehensive Income (Loss) Accumulated Other Comprehensive Income (Loss) [Abstract] Unrecorded gain on investments Unrecorded income on pension Accumulated other comprehensive income Real Estate, Property Type [Domain] Segment, Geographical [Domain] Ownership percentage in three medical office parks and an industrial park Number of Operating Segments General Ownership Percentage in Industrial and Medical Office Parks Area of Real Estate Property (in Acres and Square feet) Limited Liability Company (LLC) or Limited Partnership (LP), Members or Limited Partners, Ownership Interest Approximate yield of marketable securities based on amortized cost Marketable securities adjusted duration Marketable Securities Estimated Yield Marketable Securities Adjusted Duration Stock Issued During Period, Shares, Other Accrued Income Taxes Contingent Liability Associated with Net Income Excluding Real Estate Gain Range [Domain] Debt Instrument, Name [Domain] Minimum monthly installment on the Port Jefferson Mortgage which will vary based upon the Fixed Rate Advance. Number of years the mortgage loan is subject to the amortization schedule Loans Assumed (in Dollars) Debt Instrument, Interest Rate, Stated Percentage Debt Instrument, Basis Spread on Variable Rate (in Basis Points) Debt Instrument Minimum Periodic Payment and Modified Debt (in Dollars) Mortgage Loans on Real Estate, Periodic Payment Terms, Balloon Payment Amount (in Dollars) Mortgage Loans on Real Estate, Face Amount of Mortgages (in Dollars) Debt Instrument, Interest Rate Terms Debt Instrument, Periodic Payment, Principal (in Dollars) Line of Credit Facility, Increase (Decrease) for Period, Net (in Dollars) Mortgage Loan Amortization Period Area of Real Estate Property (in Acres) Equity Method Investments Derivative, Fixed Interest Rate Debt Instrument, Interest Rate at Period End Debt Instrument, Description of Variable Rate Basis Accumulated Other Comprehensive Income (Loss), Net of Tax LegalSettlements [Domain] Proceeds from Legal Settlements Litigation Settlement, Gross Statutory Interest Rate Payments for Delayed Tax Exempt Exchange Scenario [Axis] Geographical [Axis] Real Estate, Type of Property [Axis] Mortgage Loans on Real Estate, Description, Loan Category [Axis] Investment [Axis] Scenario, Unspecified [Domain] Range [Axis] Debt Instrument [Axis] Maximum [Member] Condemnation [Axis] Condemnation [Axis] Legal Settlements [Axis] Legal Settlements [Axis] Fairfax Medical Center [Member] Fairfax Medical Center [Member] Additional Damanges [Member] Additional Damanges [Member] Cortlandt Medical Center [Member] Cortlandt Medical Center [Member] Medicalofficepark [Member] Medical office park [Member] Gross Unrealized Gains [Member] Gross Unrealized Gains [Member] Port Jefferson Professional Park [Member] Port Jefferson Professional Park [Member] Condemnation Gross Proceeds [Member] Condemnation Gross Proceeds [Member] Amortized Cost [Member] Amortized Cost [Member] Flowerfield Industrial Park [Member] Flowerfield Industrial Park [Member] The Grove Florida [Member] The Grove, Florida [Member] Interest [Member] Interest [Member] Cortlandt Mortgage [Member] Cortlandt Mortgage [Member] Fair Value [Member] Fair Value [Member] Income Tax Provision [Member] Income Tax Provision [Member] St James New York [Member] St. James, New York [Member] Costs Disbursements And Expenses [Member] Costs, Disbursements and Expenses [Member] Document and Entity Information [Abstract] LegalMattersAndContingenciesTextBlockAbstract MortgageLoansOnRealEstateByLoanDisclosureTextBlockAbstract FairValueDisclosuresTextBlockAbstract TotalIncomeTaxProvisionOnCondemnation MortgageLoanAmortizationPeriod MarketableSecuritiesEstimatedYield ReimbursementOfCondemnationExpenses ScheduleOfCondemnationProceedsTableTextBlock RealEstateGrossBeforeLandHeldForDevelopment PensionAndOtherPostretirementBenefitsDisclosureTextBlockAbstract ContingentLiabilityAssociatedWithNetIncomeExcludingRealEstateGain NetLossBeforeCondemnationProceedsAndProvisionForIncomeTaxes EmploymentAgreementsContingenciesTableTextBlock IncreaseDecreaseInDeferredRentReceivable SubsequentEventsTextBlockAbstract CommitmentsAndContingenciesDisclosureTextBlockAbstract StatutoryInterestRate OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlockAbstract BasisOfAccountingTextBlockAbstract DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlockAbstract IncomeTaxDisclosureTextBlockAbstract RealEstateNetBeforeLandHeldForDevelopment EarningsPerShareTextBlockAbstract ScheduleOfNewAccountingPronouncementsAndChangesInAccountingPrinciplesTableTextBlockAbstract GeneralOwnershipPercentageInIndustrialAndMedicalOfficeParks DebtInstrumentMinimumPeriodicPaymentAndModifiedDebt InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlockAbstract LandHeldForDevelopment MarketableSecuritiesAdjustedDuration ConsolidationPolicyPolicyTextBlockAbstract ProceedsFromEscrow ReclassificationsTextBlockAbstract ComprehensiveIncomeLossNoteTextBlockAbstract Basis of Accounting [Text Block] Schedule of Debt [Table Text Block] Mortgage Loans on Real Estate, Face Amount of Mortgages Defined Benefit Plan, Expected Return on Plan Assets Operating Leases, Future Minimum Payments Receivable Derivative Instruments and Hedging Activities Disclosure [Text Block] Stockholders' Equity before Treasury Stock Interest Income (Expense), Net Defined Benefit Plan, Net Periodic Benefit Cost Net Cash Provided by (Used in) Investing Activities Document Period End Date Revenues Mortgage Loans on Real Estate, Periodic Payment Terms, Balloon Payment Amount Net Cash Provided by (Used in) Operating Activities Loans Assumed Cash and Cash Equivalents, Period Increase (Decrease) Payments to Acquire Marketable Securities Equity Method Investments Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] Fair Value Measurements, Recurring and Nonrecurring [Table Text Block] Amendment Flag Consolidation, Policy [Policy Text Block] Subsequent Events [Text Block] Reclassifications [Text Block] Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities Debt Instrument, Description of Variable Rate Basis Entity Central Index Key Payments for Origination of Mortgage Loans Held-for-sale Debt Instrument, Interest Rate, Stated Percentage Commitments and Contingencies Disclosure [Text Block] Increase (Decrease) in Deferred Income Taxes Debt Instrument, Interest Rate Terms Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block] Increase (Decrease) in Prepaid Expense and Other Assets Net Cash Provided by (Used in) Financing Activities Proceeds from Legal Settlements Litigation Settlement, Gross Increase (Decrease) in Receivables Income Tax Disclosure [Text Block] Entity Common Stock, Shares Outstanding Gain (Loss) on Condemnation Property, Plant and Equipment, Net Comprehensive Income (Loss), Net of Tax, Attributable to Parent Land Available for Development Limited Liability Company (LLC) or Limited Partnership (LP), Members or Limited Partners, Ownership Interest Increase (Decrease) in Accounts Payable Earnings Per Share, Basic and Diluted Schedule of Net Benefit Costs [Table Text Block] Number of Operating Segments Payments to Develop Real Estate Assets Available-for-sale Securities, Gross Unrealized Gains Increase (Decrease) in Deferred Liabilities Debt Instrument, Periodic Payment, Principal Debt Instrument, Basis Spread on Variable Rate Entity Filer Category Document Fiscal Year Focus Stock Issued During Period, Shares, Other Entity Public Float Schedule of Available-for-sale Securities Reconciliation [Table Text Block] Derivative, Fixed Interest Rate Entity Voluntary Filers Liabilities and Equity Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax Payments for Delayed Tax Exempt Exchange Repayments of First Mortgage Bond Assets Entity Current Reporting Status Comprehensive Income (Loss) Note [Text Block] Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Entity Registrant Name Earnings Per Share [Text Block] Accrued Income Taxes Line of Credit Facility, Increase (Decrease) for Period, Net Entity Well-known Seasoned Issuer Costs and Expenses Stockholders' Equity Attributable to Parent Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Amendment Description Document Type Increase (Decrease) in Accrued Liabilities Treasury Stock, Value Payments for Capital Improvements Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest Mortgage Loans on Real Estate, by Loan Disclosure [Text Block] Debt Instrument, Interest Rate at Period End Liabilities Defined Benefit Plan, Amortization of Gains (Losses) Current Fiscal Year End Date Area of Real Estate Property Document Fiscal Period Focus Fair Value Disclosures [Text Block] Legal Matters and Contingencies [Text Block] Interest Expense Pension and Other Postretirement Benefits Disclosure [Text Block] Statement [Table] Statement [Line Items]