Document And Entity Information Financing Receivables, Equal to Greater than 90 Days Past Due [Member] orm_IncomeTaxExpenseBenefitContinuingOperationsAdjustmentOfDeferredTaxAssetLiabilityFederal Reduction in Federal corporate tax rate Amount of income tax expense (benefit) from continuing operations attributable to an adjustment of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity for federal. Note To Financial Statement Details Textual Financing Receivables, 60 to 89 Days Past Due [Member] orm_DeferredFederalIncomeTaxExpenseBenefitExcludingValuationAllowance Deferred expense (benefit), federal Amount of deferred federal income tax expense (benefit) pertaining to income (loss) from continuing operations excluding valuation allowance. Retail Complex South Lake Tahoe, California [Member] Represents a retail complex located in South Lake Tahoe, California. Significant Accounting Policies orm_DebtAgreementMaximumBorrowingCapacityPercentageOfTotalCostOfProject Debt Agreement, Maximum Borrowing Capacity, Percentage of Total Cost of Project Represents the maximum borrowing capacity under a debt agreement, expressed as a percentage of the total cost of the project for which the money is borrowed. orm_TreasuryStockAcquiredPremiumPaidOverMarketPrice Treasury Stock, Acquired, Premium Paid over Market Price Represents the premium paid over market price for share of treasury stock. Note 3 - Loans and Allowance for Loan Losses Financing Receivables, Period Past Due [Domain] Note 5 - Real Estate Held for Sale orm_DeferredIncomeTaxExpenseBenefitExcludingValuationAllowance Deferred expense (benefit) Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations excluding valuation allowance. Financing Receivables, Period Past Due [Axis] Assisted Living Facility, Bensalem, Pennsylvania [Member] Represents information pertaining to a assisted living facility located in Bensalem, Pennsylvania. Note 6 - Real Estate Held for Investment Financing Receivables, 30 to 59 Days Past Due [Member] Note 7 - Line of Credit Payable orm_DeferredStateAndLocalIncomeTaxExpenseBenefitExcludingValuationAllowance Deferred expense (benefit), state and local Amount of deferred state and local tax expense (benefit) pertaining to income (loss) from continuing operations excluding valuation allowance. Financing Receivables, 1 to 29 Days Past Due [Member] orm_DebtAgreementIncreaseInInterestRateUponDefault Debt Agreement, Increase in Interest Rate Upon Default Represents the increase in the interest rate that would occur upon default under the debt agreement. Note 8 - Notes and Loans Payable on Real Estate Variable Rate [Domain] orm_DebtAgreementCurtailmentRequirement Debt Agreement, Curtailment Requirement Represents the amount the borrower is required to pay after a specified stage of project completion, and continue to pay on the last day of each calendar quarter thereafter during the term of the loan. Note 9 - Stockholders' Equity Variable Rate [Axis] orm_SecSchedule1228RealEstateCompaniesInvestmentInRealEstateAndAccumulatedDepreciationCostCapitalizedSubsequentToAcquisitionCostTransferred SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Cost Capitalized Subsequent to Acquisition, Cost Transferred Amount of cost capitalized subsequent to acquisition for real estate investment property, including, but not limited to, real estate tax and insurance, by entity with substantial portion of business acquiring and holding investment real estate or interest in real estate. Excludes initial purchase price and improvement, and real estate not held as investment or interest transferred during the period. Golf Course, Auburn, California [Member] Represents information pertaining to a golf course located in Auburn, California. Note 11 - Income Taxes Prime Rate [Member] orm_RealEstateAndAccumulatedDepreciationBookValueTransferred Real Estate and Accumulated Depreciation, Book Value Transferred Represents the real estate and accumulated depreciation, book value transferred during the period. Note 13 - Rental Income 12 Condominium & 3 Commercial Units, Tacoma, Washington [Member] Represents information pertaining to 12 condominium and 3 commercial units located in Tacoma, Washington. Marina & Boat Club with 179 Boat Slips, Isleton, California [Member] Represents information pertaining to a marina and boat club with 179 boat slips located in Isleton, California. Past Due Financing Receivables [Table Text Block] Note 14 - Fair Value Note 17 - Summary Quarterly Consolidated Financial Information (Unaudited) Dividends Classified as Ordinary Income Qualified Dividend Income Miscellaneous Real Estate [Member] Represents information pertaining to miscellaneous real estate. orm_DebtAgreementOriginationFeeObligation Debt Agreement, Origination Fee Obligation Represents the obligation under the debt agreement for origination fees. Financial Statement Schedule III - Real Estate and Accumulated Depreciation Interest income on loans Financial Statement Schedule IV - Mortgage Loans on Real Estate us-gaap_Revenues Total revenues Total revenues Office Building 2, Pleasanton, California [Member] Represents information about the second office building in Pleasanton, California. TSV Credit Agreement [Member] The credit agreement entered into by Tahoe Stateline Ventures, LLC with RaboBank, N.A. Note 3 - Loans and Allowance for Loan Losses - Allocation of the Allowance for Loan Losses (Details) Unimproved Residential and Commercial Land, Bethel Island, California [Member] Represents information pertaining to unimproved residential and commercial land located in Bethel Island, California. Outstanding Principal Balance [Member] Represents the principal balance outstanding on debt. orm_SecScheduleIiiRealEstateAmortizationOfDeferredFinancingCostsCapitalizedToConstructionProject Amortization of deferred financing costs capitalized to construction project Amount of real estate investments amortization of deferred financing costs capitalized to construction of project. Note 3 - Loans and Allowance for Loan Losses - Aging Analysis of the Loan Portfolio by the Time Past Due (Details) orm_SecScheduleIiiRealEstateSubtotalOfGrossAmountAcquisitionsThroughForeclosuresAndImprovements Subtotal The subtotal of gross amount acquisitions through foreclosures and improvements. Note 3 - Loans and Allowance for Loan Losses - Impaired Loans (Details) Changes in Real Estate Held-for-Sale and Investment [Member] Represents information pertaining to changes in real estate held-for-sale and investment. Note 3 - Loans and Allowance for Loan Losses - Troubled Debt Restructurings (Details) Note 5 - Real Estate Held for Sale - Properties Acquired Through Foreclosure (Details) Note 6 - Real Estate Held for Investment - Real Estate Held for Investment (Details) ZRV and ZRV II [Member] Represents information pertaining to Zalanta Resort at the Village, LLC ("ZRV") and Zalanta Resort at the Village - Phase II, LLC ("ZRVII"). orm_SecScheduleIiiRealEstateAccumulatedDepreciationSubtotalAmountOfBeginningBalanceAndDepreciationExpense Subtotal The real estate accumulated depreciation, subtotal amount of beginning balance and depreciation expense. Note 7 - Line of Credit Payable - Credit Facilities (Details) Note 7 - Line of Credit Payable - Loans Securing Credit Facility (Details) Note 8 - Notes and Loans Payable on Real Estate - Notes and Loans Payable Outstanding (Details) Note 8 - Notes and Loans Payable on Real Estate - Notes and Loans Payable Maturities (Details) Note 9 - Stockholders' Equity - Tax Treatment for Dividends Paid by the Company (Details) Changes in Accumulated Depreciation [Member] Represents information pertaining to changes in accumulated depreciation. Note 11 - Income Taxes - Income Tax Expense (Benefit) (Details) Note 11 - Income Taxes - Reconciliation of Income Tax (Benefit) Provision (Details) Note 11 - Income Taxes - Deferred Tax Assets (Liabilities) (Details) Note 13 - Rental Income - Future Minimum Rental Income (Details) Commercial [Member] Represents commercial property. Maturity Date Current to March 2028 [Member] Represents a maturity date that is current to March 2028. Note 14 - Fair Value - Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis (Details) Other Outstanding Obligations [Member] Represents outstanding obligations other than principal balance on debt. Management fees to Manager Management Fee Expense Note 14 - Fair Value - Level 3 Fair Value Measurements for Financial Instruments (Details) Note 14 - Fair Value - Carrying Amounts and Estimated Fair Values of Financial Instruments (Details) Closing Fee [Member] Closing fees associated with credit agreements. Mortgage Loans Between $0 and $500,000 [Member] Information pertaining to mortgage loans between $0 and $500,000. Note 17 - Summary Quarterly Consolidated Financial Information (Unaudited) - Quarterly Consolidated Financial Information (Details) Financial Statement Schedule III - Real Estate and Accumulated Depreciation - Real Estate and Accumulated Depreciation (Details) Financial Statement Schedule III - Real Estate and Accumulated Depreciation - Changes in Real Estate Held for Sale and Investment (Details) Financial Statement Schedule III - Real Estate and Accumulated Depreciation - Changes in Accumulated Depreciation (Details) Financial Statement Schedule IV - Mortgage Loans on Real Estate - Mortgage Loans on Real Estate (Details) Mortgage Loans Between $1,000,001 to $5,000,000 [Member] Information pertaining to mortgage loans between $1,000,001 to $5,000,000. Servicing Fee [Member] Represents information relating to servicing fees. Financial Statement Schedule IV - Mortgage Loans on Real Estate - Changes in Mortgage Loans on Real Estate (Details) Management Fee [Member] Represents information relating to management fees. Mortgage Loans Between $500,001 and $1,000,000 [Member] Represents information pertaining to mortgage loans between $500,001 and $1,000,000. Financial Statement Schedule IV - Mortgage Loans on Real Estate - Loans Which Exceed Three Percent of the Total Loans (Details) Interim Period, Costs Not Allocable [Domain] Owens Financial Group Inc. [Member] The legal entity of Owens Financial Group, Inc. (OFG). Notes To Financial Statements Nature of Expense [Axis] Management and Service Fees [Member] Represents information relating to management and service fees. Reported Value Measurement [Member] Notes To Financial Statements [Abstract] OFG Officers [Member] Officers of Owens Financial Group, Inc. Mortgage Loans Over $5,000,000 [Member] Represents information pertaining to mortgage loans over $5,000,000. orm_LoanFeesEarnedByOFG Loan Fees Earned by OFG The loan fees earned by OFG. Investors Yield Inc. [Member] Investor's Yield, Inc., wholly owned subsidiary. Changes in Mortgage Loans on Real Estate [Member] Represents information pertaining to changes in mortgage loans on real estate. The 2016 Repurchase Plan [Member] Represents information pertaining to the "2016 Repurchase Plan," a stock repurchase plan authorized on December 11, 2015 and set to expire on March 31, 2017, although the Company may terminate it at any time. Principal Amount of Loans Subject to Delinquent Payments Represents the principal amount of loans which is subject to delinquent payments. orm_ContingencyReservesAsAPercentOfCapital Contingency Reserves as a Percent of Capital The Company is required to maintain cash, cash equivalents, and marketable securities as contingency reserves at a percentage of capital. Discount accretion Amount of increase (decrease) in standardized measure of discounted future net cash flow as a result of passage of time on mortgage loans. Foreclosures The gross foreclosures on mortgage loans. Advances moved to principal of loans The amount of advances on mortgage loans that is moved to the principal balance. Leases of Lessor Disclosure [Text Block] Subtotal Mortgage loans on real estate subtotal of additions. Loans Which Exceed Three Percent of the Total Loans [Member] Represents information pertaining to loans which exceed three percent of the total loans. Excluding Loan Loss Reversal Foreclosed Loan [Member] Excluding loan loss reversal the foreclosed loans. Investment in limited liability company Cash and Cash Equivalents [Domain] Impaired Loans [Member] A loan is impaired when it is not likely the lender will collect the full value of the loan because the creditworthiness of a borrower has fallen. Maturity Date, January 1, 2018 [Member] Represents information pertaining to the maturity date January 1, 2018. Real Estate Properties [Member] Represents information relating to real estate properties. us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities Accounts payable and accrued liabilities Hotel, Novi, Michigan [Member] Represents information pertaining to Hotel Novi, Michigan. Quarterly Financial Information [Text Block] Real estate held for investment, accumulated depreciation Less: Accumulated depreciation and amortization us-gaap_RealEstateInvestmentPropertyAtCost Real estate held for investment, at cost us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity Lines of credit, commitment Restricted Cash and Cash Equivalents [Axis] us-gaap_TreasuryStockSharesAcquired Treasury Stock, Shares, Acquired Purchase of treasury stock (in shares) Real estate held for investment, net of accumulated depreciation of $3,316,753 in 2017 and $3,151,427 in 2016 Real estate held for investment Real estate held for investment, Net Preferred stock, shares outstanding (in shares) Use of Estimates, Policy [Policy Text Block] Ofiice Building, Chula Vista, California [Member] Represents information pertaining to office buildings located in Chula Vista, California. Common stock, shares outstanding (in shares) Maturity Date, November 1, 2018 [Member] Represents the maturity date November 1, 2018. New Accounting Pronouncements, Policy [Policy Text Block] Related Party Transaction [Domain] Real estate held for sale Real estate held for sale Related Party Transaction [Axis] Subsequent Event [Member] Line of Credit Facility, Lender [Domain] Related Party [Axis] Lender Name [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Axis] Related Party [Domain] Cash and cash equivalents Cash and cash equivalents at beginning of year Cash and cash equivalents at end of year Subsequent Events [Text Block] Schedule of Line of Credit Facilities [Table Text Block] us-gaap_IncreaseDecreaseInDueToRelatedParties Due to Manager Servicing fees to Manager Professional and Contract Services Expense us-gaap_NumberOfRealEstateProperties Number of Real Estate Properties Debt Disclosure [Text Block] us-gaap_LinesOfCreditFairValueDisclosure Lines of credit payable Real Estate Property Ownership [Axis] Real Estate Properties [Domain] Major Types of Debt Securities [Domain] Schedule of Real Estate Properties [Table Text Block] Accrued interest and advances receivable The fair value of interest and other receivables. us-gaap_TreasuryStockValueAcquiredCostMethod Treasury Stock, Value, Acquired, Cost Method Purchase of treasury stock Debt Security [Axis] Assets at fair value, comparable sales adjustment Assets at fair value, comparable sales adjustment Rental and other income from real estate properties us-gaap_TreasuryStockValue Treasury stock, at cost – 2,102,665 and 950,642 shares at December 31, 2017 and 2016 Valuation Technique [Domain] us-gaap_IncreaseDecreaseInOtherOperatingAssets Other assets Valuation Technique [Axis] Interest Reserves [Member] Represents a reserve for interest costs. Market Approach Valuation Technique [Member] Stockholders' Equity Note Disclosure [Text Block] us-gaap_SharesIssued Balances (in shares) Balances (in shares) Marina Property Located in Bethel Island, California [Member] Information pertaining to marina properties located in Bethel Island, California. Fair Value Inputs, Assets, Quantitative Information [Table Text Block] Increase in real estate from loan foreclosures Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment Ending balance: individually evaluated for impairment - loans us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment Ending balance: collectively evaluated for impairment - loans us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment Ending balance: collectively evaluated for impairment - allowance for loan losses us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1 Ending balance: individually evaluated for impairment - allowance for loan losses Other assets, accumulated depreciation and amortization Allowance for Credit Losses on Financing Receivables [Table Text Block] Real Estate Held for Development and Sale, Policy [Policy Text Block] Recoveries Recoveries us-gaap_AllowanceForLoanAndLeaseLossesAdjustmentsNet Allowance for Loan and Lease Losses, Adjustments, Other (Recovery of) provision for loan losses Real Estate, Policy [Policy Text Block] The 2017 Repurchase Plan [Member] Information pertaining to the 2017 Repurchase Plan. us-gaap_DeferredTaxAssetsValuationAllowance Deferred Tax Assets, Valuation Allowance Valuation allowance us-gaap_AllowanceForLoanAndLeaseLossesWriteoffsNet Allowance for Loan and Lease Losses Write-offs, Net us-gaap_LiabilitiesAndStockholdersEquity Total liabilities and equity CB & T Credit Facility [Member] Information pertaining to the CB & T Credit Facility. Valuation Allowance by Deferred Tax Asset [Axis] Retained earnings us-gaap_LoansAndLeasesReceivableAllowance Beginning balance Ending balance us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs Allowance for Loan and Lease Losses, Write-offs Deferred Tax Asset [Domain] Total Loans us-gaap_LoansAndLeasesReceivableGrossCarryingAmount Ending balance - loans us-gaap_DeferredTaxAssetsNet Net deferred tax assets us-gaap_DeferredTaxAssetsGross Total deferred tax assets us-gaap_DeferredTaxAssetsLiabilitiesNet Deferred Tax Assets, Net us-gaap_ProvisionForLoanAndLeaseLosses Provision for Loan and Lease Losses us-gaap_NumberOfOperatingSegments Number of Operating Segments (Reversal of) provision for loan losses Other income Federal and State NOLs in ZRV [Member] Represents information pertaining to federal and state net operating loss in ZRV. us-gaap_LiabilitiesFairValueDisclosureNonrecurring Liabilities, Fair Value Disclosure, Nonrecurring us-gaap_LiabilitiesFairValueDisclosureRecurring Liabilities, Fair Value Disclosure, Recurring us-gaap_DisclosureTextBlockAbstract Notes to Financial Statements SEC Schedule IV Mortgage Loans On Real Estate Disclosure [Text Block] The entire disclosure of mortgage loans on real estate. Revenues: Earnings Per Share, Policy [Policy Text Block] us-gaap_AncillaryFeeIncomeGeneratedByServicingFinancialAssetsAmount Ancillary Fee Income Generated by Servicing Financial Assets, Amount Income Tax, Policy [Policy Text Block] Changes in operating assets and liabilities: Net operating losses Deferred Tax Assets, Operating Loss Carryforwards us-gaap_OperatingIncomeLoss Operating income (loss) Operating (loss) income us-gaap_UndistributedNetRealizedGainOrLossOnSaleOfProperties Undistributed Net Realized Gain (Loss) on Sale of Properties Shopping Center, Ontario, California [Member] Represents a shopping center in Ontario, California. Apartment Building, Oxnard, California [Member] Represents an apartment building in Oxnard, California. Distribution received from investment in limited liability company Proceeds from Equity Method Investment, Distribution Maturity Date May 15, 2018 [Member] Represents a maturity date of April 15, 2018. Deferred income tax benefit us-gaap_DeferredIncomeTaxExpenseBenefit Storage Facility, Benbrook, Texas [Member] Represents storage facility in Benbrook, Texas. Treasury stock, shares (in shares) Amendment Flag Common stock, $.01 par value per share, 50,000,000 shares authorized, 11,198,119 shares issued, 9,095,454 and 10,247,477 shares outstanding at December 31, 2017 and 2016 Maturity Date, October 15, 2018 [Member] Represents a maturity date of October 15, 2018. Retail Building, Antioch, California [Member] Represents a retail building in Antioch, California. Common stock, share authorized (in shares) Common Stock, Shares Authorized Common stock, shares issued (in shares) Common Stock, Shares, Issued Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Current Fiscal Year End Date Amortization of deferred financing costs 73 Residential Lots, Auburn, California [Member] Represents 73 residential lost located in Auburn, California. Document Fiscal Period Focus Document Fiscal Year Focus Document Period End Date Preferred stock, $.01 par value per share, 5,000,000 shares authorized, no shares issued and outstanding at December 31, 2017 and 2016 Preferred stock, shares issued (in shares) Document Type orm_DeferredFinancingCostsCapitalized Deferred Financing Costs, Capitalized The amount of deferred financing costs that capitalized during the period. us-gaap_DepreciationDepletionAndAmortization Depreciation and amortization Preferred stock, authorized shares (in shares) Preferred Stock, Shares Authorized Document Information [Line Items] Document Information [Table] Preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share us-gaap_Depreciation Depreciation Entity Public Float Estimate of Fair Value Measurement [Member] Entity Filer Category Entity Current Reporting Status Entity Voluntary Filers Rental and other expenses on real estate properties Entity Well-known Seasoned Issuer Measurement Basis [Axis] Portion at Fair Value Measurement [Member] us-gaap_TreasuryStockAcquiredAverageCostPerShare Treasury Stock Acquired, Average Cost Per Share us-gaap_IncomeTaxExpenseBenefitContinuingOperationsAdjustmentOfDeferredTaxAssetLiability Reduction in Federal corporate tax rate us-gaap_StateAndLocalIncomeTaxExpenseBenefitContinuingOperations Income tax expense (benefit), state and local orm_GainOnForeclosureOfLoan Gain on foreclosure of loans Gain recognized during the period for foreclosure of loans. us-gaap_OtherTaxExpenseBenefit Other Share Repurchase Program [Domain] Share Repurchase Program [Axis] us-gaap_StockRepurchaseProgramAuthorizedAmount1 Stock Repurchase Program, Authorized Amount Adjustments to reconcile net income to net cash (used in) provided by operating activities: Entity Central Index Key us-gaap_FederalIncomeTaxExpenseBenefitContinuingOperations Income tax expense (benefit), federal Entity Registrant Name orm_TaxPaymentMadeOnBehalfOfStockholders Tax Payment Made on Behalf of Stockholders Tax payment made on behalf of stockholders (Note 9) Amount of capital gains tax on undistributed capital gains paid on behalf of shareholders to the U.S. Treasury. Entity [Domain] Decrease in interest and other receivables from adding balances to loans D?cr?as? in int?r?st and oth?r r?c?ivabl?s from loan for?closur?s. Legal Entity [Axis] us-gaap_CurrentIncomeTaxExpenseBenefit Current Income Tax Expense (Benefit) Date acquired Depreciable lives (Year) us-gaap_RealEstateGrossAtCarryingValue Balance at beginning of period Balance at end of period Interest Payments only and In the process of being Extended, Paid Off or Refinanced [Member] Represent the loans that are making monthly interest payments and in the process of being extended, paid off or refinanced. Carrying value Accumulated depreciation SEC Schedule III, Real Estate Accumulated Depreciation Accumulated depreciation Balance at beginning of period Balance at end of period Capitalized costs Entity Common Stock, Shares Outstanding (in shares) Cash paid during the year for income taxes Additional paid-in capital Assets at fair value Assets, Fair Value Disclosure, Nonrecurring Cash paid during the year for interest that was capitalized Cash paid during the year for interest (excluding amounts capitalized) us-gaap_CashAndCashEquivalentsFairValueDisclosure Cash and cash equivalents Initial cost Revenue Recognition, Policy [Policy Text Block] us-gaap_AssetsFairValueDisclosureRecurring Assets, Fair Value Disclosure, Recurring Encumbrances Office Building [Member] Industrial Property [Member] Trading Symbol Real Estate, Type of Property [Axis] Real Estate [Domain] us-gaap_SECScheduleIIIRealEstateWritedownOrReserveAmount SEC Schedule III, Real Estate, Write-down or Reserve, Amount Impairment writedowns us-gaap_RealEstateFederalIncomeTaxBasis SEC Schedule III, Real Estate, Federal Income Tax Basis Deferred Charges, Policy [Policy Text Block] us-gaap_StockholdersEquity Total stockholders’ equity us-gaap_RealEstateAccumulatedDepreciationOtherDeductions Accumulated depreciation on real estate moved to held for sale Commitments and Contingencies (Note 15) us-gaap_Liabilities Total liabilities us-gaap_SECScheduleIIIRealEstateAccumulatedDepreciationDepreciationExpense Depreciation of properties held for investment us-gaap_RealEstateImprovements Investments in real estate properties Sales Cost of real estate properties sold Sales SEC Schedule III, Real Estate and Accumulated Depreciation Disclosure [Text Block] us-gaap_RealEstateAcquisitionsThroughForeclosures Acquisitions through foreclosure orm_GainLossOnTransfersBetweenHeldForSaleAndHeldForInvestment Gain (Loss) on Transfers Between Held for Sale and Held for Investment The gain (loss) recognized on transfers between "Held for sale" and "Held for investment" categories. Expenses: Due to Manager Due to Related Parties Statement [Line Items] us-gaap_CostsAndExpenses Total expenses Total expenses us-gaap_LoanProcessingFee Loan Processing Fee Loans, net us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent Accounts payable and accrued liabilities us-gaap_EquityMethodInvestmentsFairValueDisclosure Investment in limited liability company us-gaap_PropertyPlantAndEquipmentUsefulLife Property, Plant and Equipment, Useful Life Fair Value, by Balance Sheet Grouping [Table Text Block] Fair Value Disclosures [Text Block] Assets Retail Site [Member] us-gaap_NetCashProvidedByUsedInFinancingActivities Net cash (used in) provided by financing activities us-gaap_ContractualObligation Contractual Obligation Building and Building Improvements [Member] us-gaap_NetCashProvidedByUsedInInvestingActivities Net cash provided by (used in) investing activities us-gaap_NetCashProvidedByUsedInOperatingActivities Net cash (used in) provided by operating activities us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease Net increase (decrease) in cash and cash equivalents Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment, Type [Axis] us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest Net income before income tax expense us-gaap_GainLossOnSaleOfPropertiesApplicableIncomeTaxes Gain (Loss) on Sale of Properties, Applicable Income Taxes us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest Balances Balances us-gaap_GainLossOnSaleOfPropertiesBeforeApplicableIncomeTaxes Gain (Loss) on Sale of Properties, before Applicable Income Taxes Equity: Business Acquisition, Acquiree [Domain] Business Acquisition [Axis] Deferred gains Deferred Gain on Sale of Property Past Maturity Loans [Member] Represents loans which are past maturity. Maturity Date, April 1, 2018 [Member] Represents a maturity date of April 1, 2018. us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour 2021 Equity Method Investments and Joint Ventures Disclosure [Text Block] us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree 2020 us-gaap_PaymentsOfDividends Dividends paid us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive 2022 Notes and loans payable on real estate Notes and loans payable, net us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo 2019 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths 2018 Noncontrolling Interest [Member] Notes payable Debt instrument, outstanding Total us-gaap_PaymentsForRepurchaseOfCommonStock Payments for Repurchase of Common Stock Purchase of treasury stock Fair Value, Inputs, Level 2 [Member] Fair Value, Inputs, Level 1 [Member] Fair Value, Inputs, Level 3 [Member] Retained Earnings [Member] Line of credit payable Additional Paid-in Capital [Member] Fair Value Hierarchy [Domain] Dividends Paid Per Share (in dollars per share) Treasury Stock [Member] Dividends declared per share of common stock (in dollars per share) Common Stock, Dividends, Per Share, Declared Fair Value, Hierarchy [Axis] Parent [Member] us-gaap_DeferredFinanceCostsNet Debt Issuance Costs, Net Less unamortized deferred financing costs Accelerated Share Repurchases, Date [Domain] Equity Component [Domain] Concentration Risk, Credit Risk, Policy [Policy Text Block] Related allowance Common Stock [Member] Interest income recognized Name of Property [Domain] Interest income recognized, with related allowance Accelerated Share Repurchases, Date [Axis] Equity Components [Axis] Recorded investment Recorded investment, with related allowance Other Commitments [Domain] Name of Property [Axis] Interest income recognized, with no related allowance Other Commitments [Axis] Allowance for Credit Losses [Text Block] Average recorded investment Average recorded investment, with related allowance Recorded investment, with no related allowance Unpaid principal balance Impaired Financing Receivable, Unpaid Principal Balance Unpaid principal balance, with related allowance Average recorded investment, with no related allowance us-gaap_PaymentsToMinorityShareholders Distributions to non-controlling interests Unpaid principal balance, with no related allowance Dividends on Shares Repurchased Under Stock Repurchase Plans, in Transit [Member] Represents information pertaining to dividends on shares repurchased under the stock repurchase plans, in transit with respect to the deposit/withdrawal at custodian process and therefore not yet held as treasury shares on the record date of the dividends. us-gaap_ProceedsFromMinorityShareholders Contribution from non-controlling interest Asset Class [Axis] Asset Class [Domain] us-gaap_PaymentsOfDebtIssuanceCosts Payment of deferred financing costs Basic and diluted weighted average number of common shares outstanding (in shares) Weighted average number of common shares outstanding (basic and diluted) (in shares) us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment Weighted Average Number Diluted Shares Outstanding Adjustment Basic and diluted earnings per common share (in dollars per share) Earnings per common share (basic and diluted) (in dollars per share) Real estate basis differences orm_DeferredTaxAssetsRealEstate Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from real estate. us-gaap_SharePrice Share Price Financing Receivable Portfolio Segment [Domain] Financing Receivable Portfolio Segment [Axis] Residential Portfolio Segment [Member] Commercial Portfolio Segment [Member] Real estate basis differences at TRS conversion Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) attributable to real estate basis differences. Scenario, Unspecified [Domain] Scenario, Forecast [Member] Scenario [Axis] us-gaap_LateFeeIncomeGeneratedByServicingFinancialAssetsAmount Late Fee Income Generated by Servicing Financial Assets, Amount Internal Revenue Service (IRS) [Member] Income Tax Authority, Name [Domain] Repurchase of treasury stock accrued as forward contract liability The amount of treasury stock repurchase and accrued as a forward contract liability. Loans and Leases Receivable, Allowance for Loan Losses Policy [Policy Text Block] Domestic Tax Authority [Member] Income Tax Authority, Name [Axis] us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders Distributions to non-controlling interests State and Local Jurisdiction [Member] Income Tax Authority [Domain] Income Tax Authority [Axis] us-gaap_OperatingLeasesFutureMinimumPaymentsReceivable Total us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableThereafter Thereafter (through 2027) Cost Approach Valuation Technique [Member] Cash and Cash Equivalents, Policy [Policy Text Block] Maximum [Member] us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableInThreeYears 2020 orm_ProvisionForReversalOfLoanAndLeaseLosses Provision (Reversal) Amount of expense (reversal) related to estimated loss from loan and lease transactions. Basis of Accounting, Policy [Policy Text Block] Range [Domain] us-gaap_OpenTaxYear Open Tax Year us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableInTwoYears 2019 Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableInFiveYears 2022 us-gaap_NetIncomeLossAttributableToNoncontrollingInterest Less: Net income attributable to non-controlling interests Less: Net loss (income) attributable to non-controlling interests Weighted Average [Member] Minimum [Member] us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableInFourYears 2021 Significant Accounting Policies [Text Block] Range [Axis] us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableCurrent 2018 us-gaap_UnrecognizedTaxBenefits Unrecognized Tax Benefits Accounting Policies [Abstract] Statement of Financial Position [Abstract] Contribution from non-controlling interest Investment, Name [Domain] Statement of Cash Flows [Abstract] Latest Tax Year [Member] us-gaap_MortgageLoansOnRealEstateFederalIncomeTaxBasis1 Mortgage Loans on Real Estate, Federal Income Tax Basis Earliest Tax Year [Member] Investment, Name [Axis] us-gaap_LessorLeasingArrangementsOperatingLeasesTermOfContract Lessor, Operating Lease, Term of Contract us-gaap_RepaymentsOfNotesPayable Repayments of Notes Payable Repayments on notes payable Statement of Stockholders' Equity [Abstract] us-gaap_MortgageLoansOnRealEstate Carrying Amount of Mortgages Balance at beginning of period Balance at end of period us-gaap_RepaymentsOfLinesOfCredit Repayments of lines of credit Storage [Member] Information pertaining to storage properties. Advances on notes payable Receivable [Domain] Receivable Type [Axis] orm_DeferredTaxAssetsRealEstateDifferenceBetweenBookValueAndTaxBasis Deferred Tax Assets, Real Estate, Difference Between Book Value and Tax Basis The aggregate difference between book and tax basis value of real estate assets. Quarterly Financial Information [Table Text Block] Advances on lines of credit New loans us-gaap_MortgageLoansOnRealEstateForeclosures Mortgage Loans on Real Estate, Foreclosures Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] Collection of principal Principal Amount of Loans Subject to Delinquent Principal orm_GainLossOnSaleOfPropertiesAttributableToParent Gain (Loss) on Sale of Properties, Attributable to Parent The difference between the carrying value and the sale price of real estate or properties that were intended to be sold or held for capital appreciation or rental income. This element refers to the gain (loss) included in earnings attributable to the parent and not to the cash proceeds of the sale. This element is a noncash adjustment to net income when calculating net cash generated by operating activities using the indirect method. Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Legal Entity Type of Counterparty [Domain] Carrying Amount of Mortgages Tax Period [Domain] orm_GainLossOnSaleOfPropertiesAttributableToNoncontrollingInterest Gain (Loss) on Sale of Properties, Attributable to Noncontrolling Interest The difference between the carrying value and the sale price of real estate or properties that were intended to be sold or held for capital appreciation or rental income. This element refers to the gain (loss) included in earnings attributable to noncontrolling interest and not to the cash proceeds of the sale. This element is a noncash adjustment to net income when calculating net cash generated by operating activities using the indirect method. Tax Period [Axis] Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Legal Entity of Counterparty, Type [Axis] Face Amount of Mortgages Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Prior Liens Interest Rate Net income Net income Net (loss) income attributable to common stockholders us-gaap_MortgageLoansOnRealEstateNumberOfLoans Mortgage Loans on Real Estate, Number of Loans Mortgage Loans on Real Estate, Original Loan Amount [Domain] Mortgage Loan, Original Amount [Axis] First Mortgage [Member] us-gaap_ProceedsFromIssuanceOfDebt Proceeds from Issuance of Debt Mortgage Loans on Real Estate, Loan Category [Domain] Fair Value Measurements, Nonrecurring [Table Text Block] us-gaap_DividendPayableDateToBePaidDayMonthAndYear Dividends Payable, Date to be Paid us-gaap_OperatingLossCarryforwards Operating Loss Carryforwards Mortgage Loans on Real Estate, Description, Loan Category [Axis] Dividends Declared [Table Text Block] us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments Net (loss) income before income taxes us-gaap_IncomeLossFromEquityMethodInvestments Income (Loss) from Equity Method Investments Income from investment in limited liability company us-gaap_IncomeTaxExpenseBenefit Income Tax Expense (Benefit) Income tax expense (benefit) Income tax (expense) benefit us-gaap_DividendsPayableDateOfRecordDayMonthAndYear Dividends Payable, Date of Record Dividends payable Dividends declared but not paid Dividends [Domain] orm_RestrictedCashFairValueDisclosure Restricted cash Fair value portion of cash which is restricted to withdrawal or usage. Dividend Paid [Member] us-gaap_PolicyTextBlockAbstract Accounting Policies Dividends [Axis] Carrying amount of loans securing CB&T Facility Land and Land Improvements [Member] Real estate held and assets that are an addition or improvement to real estate held. Credit Facility [Domain] Statement [Table] Revolving Credit Facility [Member] Credit Facility [Axis] Arizona Department of Revenue [Member] The tax authority of Arizona. Non-interest Bearing Deposit Required Under CB&T Credit Facility [Member] Represents information pertaining to non-interest bearing deposit required under CB&T facility. Income Statement [Abstract] Zalanta Resort at the Village, LLC [Member] Information pertaining to the legal entity of Zalanta Resort at the Village, LLC. Class of Stock [Axis] Award Type [Axis] Equity Award [Domain] Gain on sales of real estate, net Gain (Loss) on Sale of Properties Gain on sales of real estate, net Other us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Real Estate Properties Sold during the Period [Member] Represents the real estate properties sold by the company during the period. us-gaap_IncomeTaxReconciliationChangeInEnactedTaxRate Reduction in Federal corporate tax rate Change in Federal valuation allowance Schedule of Maturities of Long-term Debt [Table Text Block] Schedule of Debt [Table Text Block] Accrued interest payable Fair value portion of interest payable. General and administrative expense orm_SettlementExpense Settlement Expense Settlement expense Settlement expense Represents the amount of settlement expense which is the premium paid over the market price during the period. Mortgage Notes Payable Disclosure [Text Block] Deferred financing costs, net of accumulated amortization of $265,276 in 2017 and $107,744 in 2016 us-gaap_DebtIssuanceCostsLineOfCreditArrangementsGross Debt Issuance Costs, Line of Credit Arrangements, Gross Forward contract liability The increase (decrease) during the reporting period related to forward contract liability. Forward contract liability – share repurchase Represents the amount of forward contract liability for shares repurchased as of the balance sheet date. Interest and other receivables Carrying amount as of the balance sheet date of interest earned but not received and amounts due from parties or arising from transactions not otherwise specified in the taxonomy. Decrease in loans, net of allowance for loan losses, from loan foreclosures Represents the decrease in loans, net of allowance for loan losses from loan foreclosures. Contingencies Disclosure [Text Block] Principal collected on loans Second Mortgage [Member] Decrease in interest and other receivables from loan foreclosures Represents the decrease in interest and other receivables from loan foreclosures. State income tax expense (benefit), net of Federal effect Commercial Loan [Member] Tax (benefit) expense at Federal statutory rate Commitments and Contingencies Disclosure [Text Block] Schedule of Financial Instruments Owned and Pledged as Collateral [Table Text Block] Financial Instruments Owned and Pledged as Collateral, Type [Domain] Financial Instruments Owned and Pledged as Collateral by Type [Axis] us-gaap_InterestCostsCapitalized Interest Costs Capitalized Income Tax Disclosure [Text Block] California Franchise Tax Board [Member] Office Property in Oakdale, California [Member] Information pertaining to the office property located in Oakdale, California. Foreclosed [Member] Represents foreclosed loans. orm_InterestAndOtherReceivablesForeclosures Interest and Other Receivables, Foreclosures The amount of interest and other receivables relating to foreclosures. orm_GainLossOnForeclosureOfLoan Gain (Loss) on Foreclosure of Loan Represents the amount of gain (loss) on foreclosure of loan. Net proceeds from disposition of real estate properties The 2015 Repurchase Plan [Member] Information pertaining to the 2015 Repurchase Plan. orm_LoansOriginatedOrExtended Loans Originated or Extended Amount of loans originated or extended during the period. Schedule of Participating Mortgage Loans [Table Text Block] Cash flows from operating activities: To Maintain REIT Status for Federal Income Tax Purposes [Member] Information pertaining to the REIT status for federal income tax purposes. orm_MinimumPercentageOfTaxableIncomeToBeDistributedToStockholders Minimum Percentage of Taxable Income to be Distributed to Stockholders The minimum percentage of taxable income to be distributed to stockholders. Deferred financing costs, accumulated amortization Lone Star Golf, Inc., Zalanta Resort and East G, LLC [Member] Information pertaining to Lone Star Golf, Inc., Zalanta Resort and East G, LLC. Threshold to not be Subject to Federal Corporate Income Tax [Member] Information pertaining to the threshold to not be subject to federal corporate income tax. orm_AccretionOfDiscountOnLoan Accretion of discount on loans Amount of increase (decrease) in standardized measure of discounted future net cash flow as a result of passage of time. Partial Office [Member] Represents real estate property classified as partial office. Zalanta [Member] Information pertaining to Zalanta. orm_IncreaseDecreaseInterestAndOtherReceivables Interest and other receivables Increase (Decrease) in carrying amount as of the balance sheet date of interest earned but not received and amounts due from parties or arising from transactions not otherwise specified in the taxonomy. Baldwin Ranch Subdivision, LLC [Member] Information pertaining to Baldwin Ranch Subdivision, LLC. Partial Residential [Member] Represents real estate property classified as partial residential. us-gaap_ProceedsFromSaleOfOtherRealEstate Proceeds from Sale of Other Real Estate orm_NumberOfRealEstatePropertiesTransferredFromHeldForInvestmentToHeldForSale Number of Real Estate Properties Transferred from Held for Investment to Held for Sale The number of real estate properties transferred from held for investment to held for sale during the period. Undeveloped Land Located in San Jose, California [Member] Information pertaining to undeveloped land located in San Jose, California. Assisted Care Property Located in Bensalem, Pennsylvania [Member] Information pertaining to assisted care property located in Bensalem, Pennsylvania. Marina Property Located in Isleton, California [Member] Information pertaining to marina properties located in Isleton, California. Long-term Debt, Type [Axis] Impairment losses on real estate properties Impairment of Real Estate Counterparty Name [Domain] Cash flows from financing activities orm_ImpairmentLossNumberOfRealEstateProperties Impairment loss, Number of Real Estate Properties Represents number of real estate that impairment loss was recorded for them. Long-term Debt, Type [Domain] Counterparty Name [Axis] Cash flows from investing activities: Dividends Declared December 2015 and Paid in January 2016 [Member] Represents information pertaining to dividends declared for shareholders of record as of December 31, 2015 and paid in January of 2016. orm_DebtInstrumentAmortizationPeriod Debt Instrument, Amortization Period Represents the amortization period of the debt instrument. us-gaap_PaymentsToAcquireMortgageNotesReceivable Investments in loans Amortization of deferred financing costs capitalized to construction project Amortization of deferred financing costs capitalized to construction work in process. Classified as Ordinary Income [Member] Represents information relating to dividends classified as ordinary income. orm_PotentialPercentagePenaltyTax Potential Percentage Penalty Tax The percentage of potential penalty tax. Dividends Classified as Ordinary Income Percent Represents the percentage of dividends as classified for tax purposes. orm_REITMinimumPercentDistributionOfTaxableIncome REIT Minimum Percent Distribution of Taxable Income The minimum percent distribution of taxable income for REIT. Depreciation and amortization Capital Gain Distribution [Member] Represents a capital gain distribution on dividends. orm_OtherTaxExpenseBenefitFederal Other, federal Represents the amount of other federal tax expense (benefit). Dividends Classified as Return of Capital [Member] Represents information relating to dividends classified as return of capital. orm_IncomeTaxExpenseBenefitChangeInValuationAllowanceStateAndLocal Change in valuation allowance, state and local Amount of income tax expense (benefit) related to change in valuation allowance, state and local. orm_IncomeTaxExpenseBenefitChangeInValuationAllowance Change in valuation allowance Amount of income tax expense (benefit) related to change in valuation allowance. orm_OtherTaxExpenseBenefitStateAndLocal Other, state and local Represents the amount of other state and local tax expense (benefit). Other Assets [Policy Text Block] Disclosure of accounting policy for OTHER ASSETS. orm_IncomeTaxExpenseBenefitChangeInValuationAllowanceFederal Change in valuation allowance, federal Amount of income tax expense (benefit) related to change in valuation allowance, federal. Real Estate Owned [Text Block] orm_LoansAndLeasesReceivableImpairedAdvancedAmount Loans and Leases Receivable, Impaired, Advanced Amount Amount of advanced funds to borrowers for loans whose terms have been modified by troubled debt restructuring. Land Portfolio Segment [Member] Segment of financing receivable related to land portfolio. Liabilities: Settlement Agreement [Member] Represents information about Settlement Agreement. Freestone Capital Management, LLC. [Member] Represents information about Freestone Capital Management, LLC. us-gaap_DeferredFinanceCostsGross Debt Issuance Costs, Gross orm_TreasuryStockPurchasePricePaidWith2017RepurchasePlan Treasury Stock, Purchase Price Paid With 2017 Repurchase Plan Represents the amount of purchase price paid with 2017 repurchase plan. us-gaap_Assets Total assets us-gaap_LoansAndLeasesReceivableImpairedCommitmentToLend Loans and Leases Receivable, Impaired, Commitment to Lend orm_ForwardContractLiabilityTreasuryStock Forward Contract Liability, Treasury Stock Represents the amount of forward contract liability, treasury stock. us-gaap_IncreaseDecreaseInRestrictedCash Transfer from (to) restricted cash, net Allowance for loan losses: us-gaap_EquityMethodInvestmentOwnershipPercentage Equity Method Investment, Ownership Percentage 1850 [Member] 1850 De La Cruz LLC, a California limited liability company. us-gaap_PaymentsToAcquirePropertyPlantAndEquipment Purchases of vehicles and equipment orm_NumberOfCompanies Number of Companies The number of companies. Deferred tax assets, net Land Property [Member] Represents real estate property classified as land. Condominium Property [Member] Represents real estate property classified as condominium property. us-gaap_NetIncomeLoss Net income attributable to common stockholders Net (loss) income Unimproved Residential and Commercial Land Located in Gypsum Colorado [Member] Represents unimproved residential and commercial land in Gypsum, Colorado. Residential [Member] Information pertaining to residential properties. Bad debt expense from uncollectible rent orm_NumberOfRealEstatePropertiesSold Number of Real Estate Properties Sold The number of real estate properties sold during the period. Deferred Gain on Property [Member] Represents the amount of gain (loss) deferred on the sale of property. Other assets, net of accumulated depreciation and amortization of $309,686 in 2017 and $251,729 in 2016 us-gaap_DebtInstrumentUnusedBorrowingCapacityAmount Debt Instrument, Unused Borrowing Capacity, Amount Improved and Unimproved Land [Member] Represents information relating to improved and unimproved land. us-gaap_MortgageLoanRelatedToPropertySales1 Mortgage Loan Related to Property Sales Properties Acquired Through Foreclosure [Table Text Block] The tabular disclosure of properties acquired through foreclosure. us-gaap_CapitalExpendituresIncurredButNotYetPaid Capital expenditures financed through accounts payable Real Estate Held for Investment Disclosure [Text Block] Disclosure related to real estate acquired through foreclosure and now held for investment Marinas [Member] Represents real estate classified as a marina. Assisted Care Facility [Member] Represents real estate used as an assisted care facility. Golf Course [Member] Represents real estate classified as golf course. Restricted Stock [Member] Office Condominium Complex (13 Units), Roseville, California [Member] Represents information about Office Condominium Complex (13 Units), Roseville, California. Maturity Date Current to November 2020 [Member] Represents maturity date current to November 2020. Restricted cash Restricted Cash and Cash Equivalents By Property [Member] Disclosure by property. us-gaap_PaymentsForCapitalImprovements Investment in real estate properties Retail Complex and 23 Residential Condominium Units (ZRV), South Lake Tahoe, California [Member] Represents information about Retail Complex and 23 Residential Condominium Units (ZRV), South Lake Tahoe, California. Residential Land (ZRV II), South Lake Tahoe, California [Member] Represents information about Residential Land (ZRV II), South Lake Tahoe, California. us-gaap_FinancingReceivableModificationsRecordedInvestment Financing Receivable, Modifications, Recorded Investment us-gaap_RelatedPartyTransactionRate Related Party Transaction, Rate CB and T [Member] The name of the line of credit facility. Maturity Date January 2018 to November 2019 [Member] Represents the maturity date January 2018 to November 2019. us-gaap_RelatedPartyTransactionPurchasesFromRelatedParty Related Party Transaction, Purchases from Related Party Maturity Date Current to October 2018 [Member] Represents the maturity date current to October 2018. orm_InterestRateIncreasesUponDefault Interest Rate Increases Upon Default The rate of interest increases upon default to make repayments. Maturity Date October 2018 to October 2020 [Member] Represents the maturity date October 2018 to October 2020. orm_LineOfCreditFacilityMaximumBorrowingCapacityAdditionalAmount Line of Credit Facility Maximum Borrowing Capacity Additional Amount The maximum borrowing capacity of the line of credit facility if the company requests for an increase in the maximum commitment and the lenders grant permission. Maturity Date, December 31, 2018 [Member] Represents a maturity date of December 31, 2018. Opus Credit Facility [Member] The name of a credit facility. Office Building, Pleasanton, California [Member] Represents information about office building in Pleasanton, California. orm_LoanFeesAsPercentageOfLoansOriginatedRewrittenOrExtended Loan Fees as Percentage of Loans Originated, Rewritten or Extended The loan fees as a percentage of loans originated, rewritten, or extended. us-gaap_RelatedPartyTransactionAmountsOfTransaction Related Party Transaction, Amounts of Transaction Increase in loans from sales of real estate us-gaap_FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1 Financing Receivable, Modifications, Subsequent Default, Number of Contracts Retail Building, Folsom, California [Member] Represent information about a retail building in Folsom, California. Number of contracts Financing Receivable, Modifications, Number of Contracts Maturity Date, January 15, 2019[Member] Represent maturity Date of January 15, 2019. Related Party Transactions Disclosure [Text Block] Post-modification outstanding investment Pre-modification outstanding investment Maturity Date, November 1, 2019 [Member] Represents maturity date of November 1, 2019. Transfer of Construction and Related Costs from ZRV to ZRV II [Member] Represents information about transfer of construction and related costs from ZRV to ZRV II. Extended Maturity [Member] Contingency Reserves [Member] The contingency reserves. Transfer of Land from ZRV to ZRV II [Member] Represents information about transfer of land from ZRV to ZRV II. Supplemental Disclosure of Non-Cash Activity Loan Restructuring Modification [Axis] Interest expense Interest Expense Loan Restructuring Modification [Domain] Residential Real Estate [Member] Property that is solely used for residential purposes. us-gaap_AmortizationOfFinancingCosts Amortization of Debt Issuance Costs orm_PercentOfTotalLoans Percent of Total Loans Represents the percent of total loans. Impaired Financing Receivables [Table Text Block] Troubled Debt Restructurings on Financing Receivables [Table Text Block] Supplemental Disclosures of Cash Flow Information Total Dividends Paid Dividends Dividends declared Debt Instrument [Axis] Tahoe Stateline Venture, LLC [Member] Represents the legal entity of of Tahoe Stateline Venture, LLC. Medical Office Condominium Complex, Gilbert, Arizona [Member] Represents a medical office condominium complex located in Gilbert, Arizona. Debt Instrument, Name [Domain] 75 Residential Lost, Auburn, California [Member] Represents 75 residential lost located in Auburn, California. us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 Debt Instrument, Basis Spread on Variable Rate Office Condominium Complex, Roseville, California [Member] Represents an office condominium complex located in Roseville, California. Buildings and improvements Debt Instrument, Interest Rate, Stated Percentage Debt Instrument, Interest Rate, Stated Percentage us-gaap_DebtInstrumentInterestRateEffectivePercentage Debt Instrument, Interest Rate, Effective Percentage Undeveloped, Industrial Land, San Jose, California [Member] Represents underdeveloped industrial land located in San Jose, California. Land and land improvements us-gaap_TableTextBlock Notes Tables orm_DebtInstrumentDefaultRateIncrease Debt Instrument Default Rate Increase The amount by which the interest rate will increase in the event of default. us-gaap_DebtInstrumentFaceAmount Debt Instrument, Face Amount Current loans Financing Receivable, Recorded Investment, Current orm_RealEstatePropertiesTransferToHeldForInvestmentFromHeldForSale Real Estate Properties, Transfer to Held for Investment from Held for Sale Represents the book value of real estate properties transferred to "held for investment" from "held for sale" during the period. Loans, net of allowance for loan losses of $1,827,806 in 2017 and $2,706,822 in 2016 Loans, allowance for losses Allowance for Loan and Lease Losses, Real Estate orm_RealEstatePropertiesTransferToHeldForSaleFromHeldForInvestment Real Estate Properties, Transfer to Held for Sale from Held for Investment Represents the book value of real estate properties transferred to "held for sale" from "held for investment" during the period. orm_NumberOfRealEstatePropertiesTransferredFromHeldForSaleToHeldForInvestment Number of Real Estate Properties Transferred from Held for Sale to Held for Investment The number of real estate properties transferred from held for sale to held for investment during the period. Western Alliance Bank [Member] Represents information pertaining to Western Alliance Bank. us-gaap_DebtInstrumentCollateralAmount Debt Instrument, Collateral Amount December 2017 [Member] Represents the month of December in 2017. Past due loans Financing Receivable, Recorded Investment, Past Due Loan Agreement [Member] Represents information pertaining to a Construction Loan Agreement (the "Loan Agreement"). January 2018 [Member] Represents the month of January in 2018. orm_DebtAgreementMaximumBorrowingCapacityPercentageOfProjectValue Debt Agreement, Maximum Borrowing Capacity, Percentage of Project Value Represents the maximum borrowing capacity under a debt agreement, expressed as a percentage of the value of the project for which the money is borrowed. orm_DebtAgreementMaximumBorrowingCapacity Debt Agreement, Maximum Borrowing Capacity Maximum borrowing capacity under a debt agreement on the amount that could be borrowed with a combination of, but not limited to, a line of credit and term loan. Per common share data: