3.4.0.3 html 103 172 1 false 25 0 false 5 false false R1.htm 000100 - Document - Document and Entity Information Sheet http://macrogenics.com/role/DocumentAndEntityInformation Document and Entity Information Cover 1 false false R2.htm 010000 - Statement - CONSOLIDATED BALANCE SHEETS Sheet http://macrogenics.com/role/ConsolidatedBalanceSheets CONSOLIDATED BALANCE SHEETS Statements 2 false false R3.htm 010100 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical) Sheet http://macrogenics.com/role/ConsolidatedBalanceSheetsParenthetical CONSOLIDATED BALANCE SHEETS (Parenthetical) Statements 3 false false R4.htm 020000 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) Sheet http://macrogenics.com/role/ConsolidatedStatementsOfOperationsAndComprehensiveIncomeLoss CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) Statements 4 false false R5.htm 030000 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS Sheet http://macrogenics.com/role/ConsolidatedStatementsOfCashFlows CONSOLIDATED STATEMENTS OF CASH FLOWS Statements 5 false false R6.htm 060100 - Disclosure - Basis of Presentation and Recently Issued Accounting Standards Sheet http://macrogenics.com/role/BasisOfPresentationAndRecentlyIssuedAccountingStandards Basis of Presentation and Recently Issued Accounting Standards Notes 6 false false R7.htm 060200 - Disclosure - Fair Value of Financial Instruments Sheet http://macrogenics.com/role/FairValueOfFinancialInstruments Fair Value of Financial Instruments Notes 7 false false R8.htm 060300 - Disclosure - Investments Sheet http://macrogenics.com/role/Investments Investments Notes 8 false false R9.htm 060400 - Disclosure - Lease Exit Liability Sheet http://macrogenics.com/role/LeaseExitLiability Lease Exit Liability Notes 9 false false R10.htm 060500 - Disclosure - Collaboration and Other Agreements Sheet http://macrogenics.com/role/CollaborationAndOtherAgreements Collaboration and Other Agreements Notes 10 false false R11.htm 060600 - Disclosure - Stock-Based Compensation Sheet http://macrogenics.com/role/StockbasedCompensation Stock-Based Compensation Notes 11 false false R12.htm 060700 - Disclosure - Net Income (Loss) Per Share Sheet http://macrogenics.com/role/NetIncomeLossPerShare Net Income (Loss) Per Share Notes 12 false false R13.htm 070100 - Disclosure - Basis of Presentation and Recently Issued Accounting Standards (Policies) Sheet http://macrogenics.com/role/BasisOfPresentationAndRecentlyIssuedAccountingStandardsPolicies Basis of Presentation and Recently Issued Accounting Standards (Policies) Policies http://macrogenics.com/role/BasisOfPresentationAndRecentlyIssuedAccountingStandards 13 false false R14.htm 080200 - Disclosure - Fair Value of Financial Instruments (Tables) Sheet http://macrogenics.com/role/FairValueOfFinancialInstrumentsTables Fair Value of Financial Instruments (Tables) Tables http://macrogenics.com/role/FairValueOfFinancialInstruments 14 false false R15.htm 080300 - Disclosure - Investments (Tables) Sheet http://macrogenics.com/role/InvestmentsTables Investments (Tables) Tables http://macrogenics.com/role/Investments 15 false false R16.htm 080400 - Disclosure - Lease Exit Liability (Tables) Sheet http://macrogenics.com/role/LeaseExitLiabilityTables Lease Exit Liability (Tables) Tables http://macrogenics.com/role/LeaseExitLiability 16 false false R17.htm 080600 - Disclosure - Stock-Based Compensation (Tables) Sheet http://macrogenics.com/role/StockbasedCompensationTables Stock-Based Compensation (Tables) Tables http://macrogenics.com/role/StockbasedCompensation 17 false false R18.htm 080700 - Disclosure - Net Income (Loss) Per Share (Tables) Sheet http://macrogenics.com/role/NetIncomeLossPerShareTables Net Income (Loss) Per Share (Tables) Tables http://macrogenics.com/role/NetIncomeLossPerShare 18 false false R19.htm 090200 - Disclosure - Fair Value of Financial Instruments (Details) Sheet http://macrogenics.com/role/FairValueOfFinancialInstrumentsDetails Fair Value of Financial Instruments (Details) Details http://macrogenics.com/role/FairValueOfFinancialInstrumentsTables 19 false false R20.htm 090300 - Disclosure - Investments (Details) Sheet http://macrogenics.com/role/InvestmentsDetails Investments (Details) Details http://macrogenics.com/role/InvestmentsTables 20 false false R21.htm 090402 - Disclosure - Lease Exit Liability (Details) Sheet http://macrogenics.com/role/LeaseExitLiabilityDetails Lease Exit Liability (Details) Details http://macrogenics.com/role/LeaseExitLiabilityTables 21 false false R22.htm 090500 - Disclosure - Collaboration and Other Agreements, Janssen Biotech, Inc. (Details) Sheet http://macrogenics.com/role/CollaborationAndOtherAgreementsJanssenBiotechIncDetails Collaboration and Other Agreements, Janssen Biotech, Inc. (Details) Details 22 false false R23.htm 090502 - Disclosure - Collaboration and Other Agreements, Takeda (Details) Sheet http://macrogenics.com/role/CollaborationAndOtherAgreementsTakedaDetails Collaboration and Other Agreements, Takeda (Details) Details http://macrogenics.com/role/CollaborationAndOtherAgreements 23 false false R24.htm 090506 - Disclosure - Collaboration and Other Agreements, Servier (Details) Sheet http://macrogenics.com/role/CollaborationAndOtherAgreementsServierDetails Collaboration and Other Agreements, Servier (Details) Details 24 false false R25.htm 090512 - Disclosure - Collaboration and Other Agreements, Green Cross (Details) Sheet http://macrogenics.com/role/CollaborationAndOtherAgreementsGreenCrossDetails Collaboration and Other Agreements, Green Cross (Details) Details 25 false false R26.htm 090514 - Disclosure - Collaboration and Other Agreements, NIAID Contract (Details) Sheet http://macrogenics.com/role/CollaborationAndOtherAgreementsNiaidContractDetails Collaboration and Other Agreements, NIAID Contract (Details) Details 26 false false R27.htm 090600 - Disclosure - Stock-Based Compensation, Stock-Based Compensation Expense (Details) Sheet http://macrogenics.com/role/StockbasedCompensationStockbasedCompensationExpenseDetails Stock-Based Compensation, Stock-Based Compensation Expense (Details) Details 27 false false R28.htm 090602 - Disclosure - Stock-Based Compensation, Option Pricing Assumptions (Details) Sheet http://macrogenics.com/role/StockbasedCompensationOptionPricingAssumptionsDetails Stock-Based Compensation, Option Pricing Assumptions (Details) Details 28 false false R29.htm 090604 - Disclosure - Stock-Based Compensation, Stock Option Activity (Details) Sheet http://macrogenics.com/role/StockbasedCompensationStockOptionActivityDetails Stock-Based Compensation, Stock Option Activity (Details) Details 29 false false R30.htm 090700 - Disclosure - Net Income (Loss) Per Share (Details) Sheet http://macrogenics.com/role/NetIncomeLossPerShareDetails Net Income (Loss) Per Share (Details) Details http://macrogenics.com/role/NetIncomeLossPerShareTables 30 false false All Reports Book All Reports mgnx-20160331.xml mgnx-20160331.xsd mgnx-20160331_cal.xml mgnx-20160331_def.xml mgnx-20160331_lab.xml mgnx-20160331_pre.xml true true