3.3.0.814 html 265 273 1 true 77 0 false 6 false false R1.htm 0001000 - Document - Document And Entity Information Sheet http://www.javelinreit.com/role/DocumentAndEntityInformation Document And Entity Information Cover 1 false false R2.htm 1001000 - Statement - Condensed Consolidated Balance Sheet Sheet http://www.javelinreit.com/role/CondensedConsolidatedBalanceSheet Condensed Consolidated Balance Sheet Statements 2 false false R3.htm 1001501 - Statement - Condensed Consolidated Balance Sheet (Parentheticals) Sheet http://www.javelinreit.com/role/CondensedConsolidatedBalanceSheetParentheticals Condensed Consolidated Balance Sheet (Parentheticals) Statements 3 false false R4.htm 1002000 - Statement - Condensed Consolidated Statement of Operations Sheet http://www.javelinreit.com/role/CondensedConsolidatedStatementOfOperations Condensed Consolidated Statement of Operations Statements 4 false false R5.htm 1003000 - Statement - Condensed Consolidated Statements of Comprehensive Income (Loss) Sheet http://www.javelinreit.com/role/CondensedConsolidatedStatementsOfComprehensiveIncomeLoss Condensed Consolidated Statements of Comprehensive Income (Loss) Statements 5 false false R6.htm 1004000 - Statement - Condensed Consolidated Statement of Stockholders' Equity Sheet http://www.javelinreit.com/role/CondensedConsolidatedStatementOfStockholdersEquity Condensed Consolidated Statement of Stockholders' Equity Statements 6 false false R7.htm 1005000 - Statement - Condensed Consolidated Statements of Cash Flows (Unaudited) Sheet http://www.javelinreit.com/role/CondensedConsolidatedStatementsOfCashFlowsUnaudited Condensed Consolidated Statements of Cash Flows (Unaudited) Statements 7 false false R8.htm 2101100 - Disclosure - Basis of Presentation Sheet http://www.javelinreit.com/role/BasisOfPresentation Basis of Presentation Notes 8 false false R9.htm 2102100 - Disclosure - Organization and Nature of Business Operations Sheet http://www.javelinreit.com/role/OrganizationAndNatureOfBusinessOperations Organization and Nature of Business Operations Notes 9 false false R10.htm 2103100 - Disclosure - Summary of Significant Accounting Policies Sheet http://www.javelinreit.com/role/SummaryOfSignificantAccountingPolicies Summary of Significant Accounting Policies Notes 10 false false R11.htm 2104100 - Disclosure - Recent Accounting Pronouncements Sheet http://www.javelinreit.com/role/RecentAccountingPronouncements Recent Accounting Pronouncements Notes 11 false false R12.htm 2105100 - Disclosure - Fair Value of Financial Instruments Sheet http://www.javelinreit.com/role/FairValueOfFinancialInstruments Fair Value of Financial Instruments Notes 12 false false R13.htm 2106100 - Disclosure - Agency Securities, Available for Sale Sheet http://www.javelinreit.com/role/AgencySecuritiesAvailableForSale Agency Securities, Available for Sale Notes 13 false false R14.htm 2107100 - Disclosure - Non-Agency Securities, Trading Sheet http://www.javelinreit.com/role/NonAgencySecuritiesTrading Non-Agency Securities, Trading Notes 14 false false R15.htm 2108100 - Disclosure - Linked Transactions Sheet http://www.javelinreit.com/role/LinkedTransactions Linked Transactions Notes 15 false false R16.htm 2109100 - Disclosure - Repurchase Agreements Sheet http://www.javelinreit.com/role/RepurchaseAgreements Repurchase Agreements Notes 16 false false R17.htm 2110100 - Disclosure - Derivatives Sheet http://www.javelinreit.com/role/Derivatives Derivatives Notes 17 false false R18.htm 2111100 - Disclosure - Commitments and Contingencies Sheet http://www.javelinreit.com/role/CommitmentsAndContingencies Commitments and Contingencies Notes 18 false false R19.htm 2112100 - Disclosure - Stock-Based Compensation Sheet http://www.javelinreit.com/role/StockBasedCompensation Stock-Based Compensation Notes 19 false false R20.htm 2113100 - Disclosure - Stockholders' Equity Sheet http://www.javelinreit.com/role/StockholdersEquity Stockholders' Equity Notes 20 false false R21.htm 2114100 - Disclosure - Net Income (Loss) per Common Share Sheet http://www.javelinreit.com/role/NetIncomeLossPerCommonShare Net Income (Loss) per Common Share Notes 21 false false R22.htm 2115100 - Disclosure - Income Taxes Sheet http://www.javelinreit.com/role/IncomeTaxes Income Taxes Notes 22 false false R23.htm 2116100 - Disclosure - Related Party Transactions Sheet http://www.javelinreit.com/role/RelatedPartyTransactions Related Party Transactions Notes 23 false false R24.htm 2117100 - Disclosure - Interest Rate Risk Sheet http://www.javelinreit.com/role/InterestRateRisk Interest Rate Risk Notes 24 false false R25.htm 2118100 - Disclosure - Subsequent Events Sheet http://www.javelinreit.com/role/SubsequentEvents Subsequent Events Notes 25 false false R26.htm 2203201 - Disclosure - Summary of Significant Accounting Policies (Policies) Sheet http://www.javelinreit.com/role/SummaryOfSignificantAccountingPoliciesPolicies Summary of Significant Accounting Policies (Policies) Policies http://www.javelinreit.com/role/SummaryOfSignificantAccountingPolicies 26 false false R27.htm 2305301 - Disclosure - Fair Value of Financial Instruments (Tables) Sheet http://www.javelinreit.com/role/FairValueOfFinancialInstrumentsTables Fair Value of Financial Instruments (Tables) Tables http://www.javelinreit.com/role/FairValueOfFinancialInstruments 27 false false R28.htm 2306301 - Disclosure - Agency Securities, Available for Sale (Tables) Sheet http://www.javelinreit.com/role/AgencySecuritiesAvailableForSaleTables Agency Securities, Available for Sale (Tables) Tables http://www.javelinreit.com/role/AgencySecuritiesAvailableForSale 28 false false R29.htm 2307301 - Disclosure - Non-Agency Securities, Trading (Tables) Sheet http://www.javelinreit.com/role/NonAgencySecuritiesTradingTables Non-Agency Securities, Trading (Tables) Tables http://www.javelinreit.com/role/NonAgencySecuritiesTrading 29 false false R30.htm 2308301 - Disclosure - Linked Transactions (Tables) Sheet http://www.javelinreit.com/role/LinkedTransactionsTables Linked Transactions (Tables) Tables http://www.javelinreit.com/role/LinkedTransactions 30 false false R31.htm 2309301 - Disclosure - Repurchase Agreements (Tables) Sheet http://www.javelinreit.com/role/RepurchaseAgreementsTables Repurchase Agreements (Tables) Tables http://www.javelinreit.com/role/RepurchaseAgreements 31 false false R32.htm 2310301 - Disclosure - Derivatives (Tables) Sheet http://www.javelinreit.com/role/DerivativesTables Derivatives (Tables) Tables http://www.javelinreit.com/role/Derivatives 32 false false R33.htm 2313301 - Disclosure - Stockholders' Equity (Tables) Sheet http://www.javelinreit.com/role/StockholdersEquityTables Stockholders' Equity (Tables) Tables http://www.javelinreit.com/role/StockholdersEquity 33 false false R34.htm 2315301 - Disclosure - Income Taxes (Tables) Sheet http://www.javelinreit.com/role/IncomeTaxesTables Income Taxes (Tables) Tables http://www.javelinreit.com/role/IncomeTaxes 34 false false R35.htm 2403402 - Disclosure - Summary of Significant Accounting Policies (Details) Sheet http://www.javelinreit.com/role/SummaryOfSignificantAccountingPoliciesDetails Summary of Significant Accounting Policies (Details) Details http://www.javelinreit.com/role/SummaryOfSignificantAccountingPoliciesPolicies 35 false false R36.htm 2405402 - Disclosure - Fair Value of Financial Instruments - Additional Information (Details) Sheet http://www.javelinreit.com/role/FairValueOfFinancialInstrumentsAdditionalInformationDetails Fair Value of Financial Instruments - Additional Information (Details) Details 36 false false R37.htm 2405403 - Disclosure - Fair Value of Financial Instruments - Summary of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) Sheet http://www.javelinreit.com/role/FairValueOfFinancialInstrumentsSummaryOfAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisDetails Fair Value of Financial Instruments - Summary of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) Details 37 false false R38.htm 2405404 - Disclosure - Fair Value of Financial Instruments - Carrying Values and Fair Values of Financial Assets and Liabilities (Details) Sheet http://www.javelinreit.com/role/FairValueOfFinancialInstrumentsCarryingValuesAndFairValuesOfFinancialAssetsAndLiabilitiesDetails Fair Value of Financial Instruments - Carrying Values and Fair Values of Financial Assets and Liabilities (Details) Details 38 false false R39.htm 2405405 - Disclosure - Fair Value of Financial Instruments - Changes in Level 3 Assets Measured at Fair Value on a Recurring Basis, Trading Securities (Details) Sheet http://www.javelinreit.com/role/FairValueOfFinancialInstrumentsChangesInLevel3AssetsMeasuredAtFairValueOnRecurringBasisTradingSecuritiesDetails Fair Value of Financial Instruments - Changes in Level 3 Assets Measured at Fair Value on a Recurring Basis, Trading Securities (Details) Details 39 false false R40.htm 2405406 - Disclosure - Fair Value of Financial Instruments - Changes in Level 3 Assets Measured at Fair Value on a Recurring Basis, Linked Transactions (Details) Sheet http://www.javelinreit.com/role/FairValueOfFinancialInstrumentsChangesInLevel3AssetsMeasuredAtFairValueOnRecurringBasisLinkedTransactionsDetails Fair Value of Financial Instruments - Changes in Level 3 Assets Measured at Fair Value on a Recurring Basis, Linked Transactions (Details) Details 40 false false R41.htm 2405407 - Disclosure - Fair Value of Financial Instruments - Range of Estimates of Cumulative Default and Loss Severities and Discount Rates (Details) Sheet http://www.javelinreit.com/role/FairValueOfFinancialInstrumentsRangeOfEstimatesOfCumulativeDefaultAndLossSeveritiesAndDiscountRatesDetails Fair Value of Financial Instruments - Range of Estimates of Cumulative Default and Loss Severities and Discount Rates (Details) Details 41 false false R42.htm 2406402 - Disclosure - Agency Securities, Available for Sale - Additional Information (Details) Sheet http://www.javelinreit.com/role/AgencySecuritiesAvailableForSaleAdditionalInformationDetails Agency Securities, Available for Sale - Additional Information (Details) Details 42 false false R43.htm 2406403 - Disclosure - Agency Securities, Available for Sale - Unrealized Gain or Loss Position and Components of Carrying Value of Available for Sale Agency Securities (Details) Sheet http://www.javelinreit.com/role/AgencySecuritiesAvailableForSaleUnrealizedGainOrLossPositionAndComponentsOfCarryingValueOfAvailableForSaleAgencySecuritiesDetails Agency Securities, Available for Sale - Unrealized Gain or Loss Position and Components of Carrying Value of Available for Sale Agency Securities (Details) Details 43 false false R44.htm 2406404 - Disclosure - Agency Securities, Available for Sale - Summary of Weighted Average Lives of Agency Securities (Details) Sheet http://www.javelinreit.com/role/AgencySecuritiesAvailableForSaleSummaryOfWeightedAverageLivesOfAgencySecuritiesDetails Agency Securities, Available for Sale - Summary of Weighted Average Lives of Agency Securities (Details) Details 44 false false R45.htm 2406405 - Disclosure - Agency Securities, Available for Sale - Gross Unrealized Losses and Estimated Fair Value of Agency Securities (Details) Sheet http://www.javelinreit.com/role/AgencySecuritiesAvailableForSaleGrossUnrealizedLossesAndEstimatedFairValueOfAgencySecuritiesDetails Agency Securities, Available for Sale - Gross Unrealized Losses and Estimated Fair Value of Agency Securities (Details) Details 45 false false R46.htm 2407402 - Disclosure - Non-Agency Securities, Trading - Additional Information (Details) Sheet http://www.javelinreit.com/role/NonAgencySecuritiesTradingAdditionalInformationDetails Non-Agency Securities, Trading - Additional Information (Details) Details 46 false false R47.htm 2407403 - Disclosure - Non-Agency Securities, Trading - Summary of Non-Agency Securities (Details) Sheet http://www.javelinreit.com/role/NonAgencySecuritiesTradingSummaryOfNonAgencySecuritiesDetails Non-Agency Securities, Trading - Summary of Non-Agency Securities (Details) Details 47 false false R48.htm 2407404 - Disclosure - Non-Agency Securities, Trading - Summary of Weighted Average Lives of Agency Securities (Details) Sheet http://www.javelinreit.com/role/NonAgencySecuritiesTradingSummaryOfWeightedAverageLivesOfAgencySecuritiesDetails Non-Agency Securities, Trading - Summary of Weighted Average Lives of Agency Securities (Details) Details 48 false false R49.htm 2407405 - Disclosure - Non-Agency Securities, Trading - Unrealized Losses and Estimated Fair Value of Non-Agency Securities (Details) Sheet http://www.javelinreit.com/role/NonAgencySecuritiesTradingUnrealizedLossesAndEstimatedFairValueOfNonAgencySecuritiesDetails Non-Agency Securities, Trading - Unrealized Losses and Estimated Fair Value of Non-Agency Securities (Details) Details 49 false false R50.htm 2408402 - Disclosure - Linked Transactions - Additional Information (Details) Sheet http://www.javelinreit.com/role/LinkedTransactionsAdditionalInformationDetails Linked Transactions - Additional Information (Details) Details 50 false false R51.htm 2408403 - Disclosure - Linked Transactions - Non-Agency Securities and Repurchase Agreements Underlying Linked Transactions (Details) Sheet http://www.javelinreit.com/role/LinkedTransactionsNonAgencySecuritiesAndRepurchaseAgreementsUnderlyingLinkedTransactionsDetails Linked Transactions - Non-Agency Securities and Repurchase Agreements Underlying Linked Transactions (Details) Details 51 false false R52.htm 2408404 - Disclosure - Linked Transactions - Unrealized Net Gain (Loss) and Net Interest Income from Linked Transactions (Details) Sheet http://www.javelinreit.com/role/LinkedTransactionsUnrealizedNetGainLossAndNetInterestIncomeFromLinkedTransactionsDetails Linked Transactions - Unrealized Net Gain (Loss) and Net Interest Income from Linked Transactions (Details) Details 52 false false R53.htm 2409402 - Disclosure - Repurchase Agreements - Additional Information (Details) Sheet http://www.javelinreit.com/role/RepurchaseAgreementsAdditionalInformationDetails Repurchase Agreements - Additional Information (Details) Details 53 false false R54.htm 2409403 - Disclosure - Repurchase Agreements - Summary of Repurchase Agreements (Details) Sheet http://www.javelinreit.com/role/RepurchaseAgreementsSummaryOfRepurchaseAgreementsDetails Repurchase Agreements - Summary of Repurchase Agreements (Details) Details 54 false false R55.htm 2409404 - Disclosure - Repurchase Agreements - Contractual Repricing, Master Repurchase Agreement and Other Information Regarding Repurchase Agreements (Details) Sheet http://www.javelinreit.com/role/RepurchaseAgreementsContractualRepricingMasterRepurchaseAgreementAndOtherInformationRegardingRepurchaseAgreementsDetails Repurchase Agreements - Contractual Repricing, Master Repurchase Agreement and Other Information Regarding Repurchase Agreements (Details) Details 55 false false R56.htm 2409405 - Disclosure - Repurchase Agreements - Agreements Exceed 5 Percent of Stockholders Equity (Details) Sheet http://www.javelinreit.com/role/RepurchaseAgreementsAgreementsExceed5PercentOfStockholdersEquityDetails Repurchase Agreements - Agreements Exceed 5 Percent of Stockholders Equity (Details) Details 56 false false R57.htm 2410402 - Disclosure - Derivatives - Interest Rate Swap Contracts, Swaptions and Futures Contracts (Details) Sheet http://www.javelinreit.com/role/DerivativesInterestRateSwapContractsSwaptionsAndFuturesContractsDetails Derivatives - Interest Rate Swap Contracts, Swaptions and Futures Contracts (Details) Details 57 false false R58.htm 2410403 - Disclosure - Derivatives - Offsetting Assets (Details) Sheet http://www.javelinreit.com/role/DerivativesOffsettingAssetsDetails Derivatives - Offsetting Assets (Details) Details 58 false false R59.htm 2410404 - Disclosure - Derivatives - Offsetting Liabilities (Details) Sheet http://www.javelinreit.com/role/DerivativesOffsettingLiabilitiesDetails Derivatives - Offsetting Liabilities (Details) Details 59 false false R60.htm 2410405 - Disclosure - Derivatives - Location and Information of Derivatives (Details) Sheet http://www.javelinreit.com/role/DerivativesLocationAndInformationOfDerivativesDetails Derivatives - Location and Information of Derivatives (Details) Details 60 false false R61.htm 2411401 - Disclosure - Commitments and Contingencies (Details) Sheet http://www.javelinreit.com/role/CommitmentsAndContingenciesDetails Commitments and Contingencies (Details) Details http://www.javelinreit.com/role/CommitmentsAndContingencies 61 false false R62.htm 2412401 - Disclosure - Stock-Based Compensation (Details) Sheet http://www.javelinreit.com/role/StockBasedCompensationDetails Stock-Based Compensation (Details) Details http://www.javelinreit.com/role/StockBasedCompensation 62 false false R63.htm 2413402 - Disclosure - Stockholders' Equity - Dividend Transactions (Details) Sheet http://www.javelinreit.com/role/StockholdersEquityDividendTransactionsDetails Stockholders' Equity - Dividend Transactions (Details) Details 63 false false R64.htm 2413403 - Disclosure - Stockholders' Equity - Equity Transactions (Details) Sheet http://www.javelinreit.com/role/StockholdersEquityEquityTransactionsDetails Stockholders' Equity - Equity Transactions (Details) Details 64 false false R65.htm 2414401 - Disclosure - Net Income (Loss) per Common Share (Details) Sheet http://www.javelinreit.com/role/NetIncomeLossPerCommonShareDetails Net Income (Loss) per Common Share (Details) Details http://www.javelinreit.com/role/NetIncomeLossPerCommonShare 65 false false R66.htm 2415402 - Disclosure - Income Taxes - Reconciliation of GAAP Net Income to Estimated REIT Taxable Income (Details) Sheet http://www.javelinreit.com/role/IncomeTaxesReconciliationOfGaapNetIncomeToEstimatedReitTaxableIncomeDetails Income Taxes - Reconciliation of GAAP Net Income to Estimated REIT Taxable Income (Details) Details 66 false false R67.htm 2415403 - Disclosure - Income Taxes - Additional Information (Details) Sheet http://www.javelinreit.com/role/IncomeTaxesAdditionalInformationDetails Income Taxes - Additional Information (Details) Details 67 false false R68.htm 2416401 - Disclosure - Related Party Transactions (Details) Sheet http://www.javelinreit.com/role/RelatedPartyTransactionsDetails Related Party Transactions (Details) Details http://www.javelinreit.com/role/RelatedPartyTransactions 68 false false R69.htm 2418401 - Disclosure - Subsequent Events (Details) Sheet http://www.javelinreit.com/role/SubsequentEventsDetails Subsequent Events (Details) Details http://www.javelinreit.com/role/SubsequentEvents 69 false false All Reports Book All Reports In ''Condensed Consolidated Balance Sheet'', column(s) 3, 4 are contained in other reports, so were removed by flow through suppression. In ''Condensed Consolidated Statement of Operations'', column(s) 1, 2, 3, 4, 5, 6, 7, 8, 9 are contained in other reports, so were removed by flow through suppression. In ''Condensed Consolidated Statements of Cash Flows (Unaudited)'', column(s) 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 14 are contained in other reports, so were removed by flow through suppression. jmi-20150930.xml jmi-20150930_cal.xml jmi-20150930_def.xml jmi-20150930_lab.xml jmi-20150930_pre.xml jmi-20150930.xsd true true