$MGNX
MACROGENICS INC Stock $mgnx

$mgnx Overview Financials Valuation SEC Filings Company Website

2019 Q1 Form 10-K Financial Statement

#000112534519000046 Filed on February 26, 2019

Income Statement

Concept	2019 Q1	2018 Q1	2017 Q4
Revenue	$9.662M	$4.695M	$152.4M
YoY Change	105.79%	128.47%	2883.92%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin	$10.20M	$9.200M	$8.400M
YoY Change	10.87%	22.67%	-8.7%
% of Gross Profit
Research & Development	$47.06M	$45.67M	$39.00M
YoY Change	3.04%	39.23%	25.4%
% of Gross Profit
Depreciation & Amortization	$2.903M	$1.338M	$1.340M
YoY Change	116.97%	-32.36%	-32.32%
% of Gross Profit
Operating Expenses	$47.06M	$45.67M	$47.40M
YoY Change	3.04%	39.23%	17.62%
Operating Profit	-$47.62M	-$50.21M
YoY Change	-5.16%	31.41%
Interest Expense
YoY Change
% of Operating Profit
Other Income/Expense, Net	$2.600M	$674.0K	$800.0K
YoY Change	285.76%	21.88%	60.0%
Pretax Income	-$45.00M	-$49.50M	$105.7M
YoY Change	-9.09%	31.3%	-403.74%
Income Tax			$0.00
% Of Pretax Income			0.0%
Net Earnings	-$45.02M	-$49.54M	$105.7M
YoY Change	-9.12%	31.55%	-403.96%
Net Earnings / Revenue	-465.92%	-1055.08%	69.39%
Basic Earnings Per Share			$2.87
Diluted Earnings Per Share	-$986.8K	-$1.341M	$2.80
COMMON SHARES
Basic Shares Outstanding	48.78M shares	36.94M shares	36.82M shares
Diluted Shares Outstanding		36.94M shares

Balance Sheet

Concept	2019 Q1	2018 Q1	2017 Q4
SHORT-TERM ASSETS
Cash & Short-Term Investments	$320.4M	$260.1M	$305.1M
YoY Change	23.18%	6.99%	10.14%
Cash & Equivalents	$238.6M	$200.4M	$211.7M
Short-Term Investments	$81.80M	$59.60M	$93.40M
Other Short-Term Assets	$8.500M	$3.600M	$3.600M
YoY Change	136.11%	-37.93%	-14.29%
Inventory
Prepaid Expenses	$8.309M	$3.328M	$3.151M
Receivables	$6.115M	$7.281M	$13.64M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$335.0M	$271.0M	$322.3M
YoY Change	23.61%	7.98%	13.51%
LONG-TERM ASSETS
Property, Plant & Equipment	$54.82M	$53.44M	$49.98M
YoY Change	2.57%	207.57%	178.29%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments			$0.00
YoY Change			-100.0%
Other Assets	$24.79M	$1.596M	$1.602M
YoY Change	1453.07%	17.35%	17.02%
Total Long-Term Assets	$79.61M	$55.04M	$51.59M
YoY Change	44.63%	132.09%	88.85%
TOTAL ASSETS
Total Short-Term Assets	$335.0M	$271.0M	$322.3M
Total Long-Term Assets	$79.61M	$55.04M	$51.59M
Total Assets	$414.6M	$326.1M	$373.9M
YoY Change	27.16%	18.69%	20.12%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$925.0K	$10.27M	$2.451M
YoY Change	-90.99%	577.62%	-38.65%
Accrued Expenses	$28.85M	$30.49M	$38.58M
YoY Change	-5.37%	69.79%	139.13%
Deferred Revenue	$18.09M
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due		$0.00	$300.0K
YoY Change		-100.0%	-81.25%
Total Short-Term Liabilities	$51.77M	$49.96M	$49.76M
YoY Change	3.63%	88.14%	82.24%
LONG-TERM LIABILITIES
Long-Term Debt	$0.00	$0.00	$0.00
YoY Change			-100.0%
Other Long-Term Liabilities	$42.30M	$28.80M	$24.90M
YoY Change	46.88%	113.33%	67.11%
Total Long-Term Liabilities	$42.30M	$28.80M	$24.90M
YoY Change	46.88%	113.33%	63.82%
TOTAL LIABILITIES
Total Short-Term Liabilities	$51.77M	$49.96M	$49.76M
Total Long-Term Liabilities	$42.30M	$28.80M	$24.90M
Total Liabilities	$94.02M	$78.80M	$74.65M
YoY Change	19.31%	96.6%	75.59%
SHAREHOLDERS EQUITY
Retained Earnings	-$535.3M	-$318.8M	-$312.3M
YoY Change	67.9%	-3.5%	6.7%
Common Stock	$855.9M	$615.7M	$611.6M
YoY Change	39.02%	8.94%	8.92%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$320.6M	$247.3M	$299.2M
YoY Change
Total Liabilities & Shareholders Equity	$414.6M	$326.1M	$373.9M
YoY Change	27.16%	18.69%	20.12%

Cashflow Statement

Concept	2019 Q1	2018 Q1	2017 Q4
OPERATING ACTIVITIES
Net Income	-$45.02M	-$49.54M	$105.7M
YoY Change	-9.12%	31.55%	-403.96%
Depreciation, Depletion And Amortization	$2.903M	$1.338M	$1.340M
YoY Change	116.97%	-32.36%	-32.32%
Cash From Operating Activities	-$30.00M	-$31.30M	$111.9M
YoY Change	-4.15%	-11.41%	-494.81%
INVESTING ACTIVITIES
Capital Expenditures	$1.675M	$14.52M	-$10.75M
YoY Change	-88.46%	873.12%	914.15%
Acquisitions
YoY Change
Other Investing Activities	-$68.82M	$33.91M	$19.40M
YoY Change	-302.95%	-593.6%	527.83%
Cash From Investing Activities	-$70.49M	$19.39M	$8.640M
YoY Change	-463.55%	-331.94%	325.62%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net	$118.7M	$0.00
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	$119.0M	630.0K	360.0K
YoY Change	18789.68%	472.73%	-26.53%
NET CHANGE
Cash From Operating Activities	-$30.00M	-31.30M	111.9M
Cash From Investing Activities	-$70.49M	19.39M	8.640M
Cash From Financing Activities	$119.0M	630.0K	360.0K
Net Change In Cash	$18.51M	-11.28M	120.9M
YoY Change	-264.12%	-74.12%	-568.23%
FREE CASH FLOW
Cash From Operating Activities	-$30.00M	-$31.30M	$111.9M
Capital Expenditures	$1.675M	$14.52M	-$10.75M
Free Cash Flow	-$31.68M	-$45.82M	$122.6M
YoY Change	-30.87%	24.43%	-549.58%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
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CY2018	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
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CY2018	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2018	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2018	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2018	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2018	dei	Entity Small Business EntitySmallBusiness	false
CY2018	dei	Entity Shell Company EntityShellCompany	false
CY2018	dei	Entity Registrant Name EntityRegistrantName	MACROGENICS INC
CY2018	dei	Entity Central Index Key EntityCentralIndexKey	0001125345
CY2018	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2018	dei	Document Period End Date DocumentPeriodEndDate	2018-12-31
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CY2016	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	-43679000	USD
CY2018	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	132750000	USD
CY2016	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	347762000	USD
CY2018	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	214348000	USD
CY2017	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	242401000	USD
CY2016	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	288894000	USD
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	24954000	USD
CY2017	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	29403000	USD
CY2016	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	11381000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	56644000	USD
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	77876000	USD
CY2016	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-70249000	USD
CY2018	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	103259000	USD
CY2017	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	34244000	USD
CY2016	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	0	USD
CY2018	mgnx	Proceedsfrom Stock Options Exercised And Espp Purchases ProceedsfromStockOptionsExercisedAndESPPPurchases	1992000	USD
CY2017	mgnx	Proceedsfrom Stock Options Exercised And Espp Purchases ProceedsfromStockOptionsExercisedAndESPPPurchases	1144000	USD
CY2016	mgnx	Proceedsfrom Stock Options Exercised And Espp Purchases ProceedsfromStockOptionsExercisedAndESPPPurchases	1893000	USD
CY2018	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	260000	USD
CY2017	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	40000	USD
CY2016	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	39000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	104991000	USD
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	35348000	USD
CY2016	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	1854000	USD
CY2018	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	8401000	USD
CY2017	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	127629000	USD
CY2016	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-112074000	USD
CY2017Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	211727000	USD
CY2015Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	196172000	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	220128000	USD
CY2017Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	211727000	USD
CY2016Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	84098000	USD
CY2018	mgnx	Fair Value Of Warrants Received FairValueOfWarrantsReceived	6130000	USD
CY2017	mgnx	Fair Value Of Warrants Received FairValueOfWarrantsReceived	0	USD
CY2016	mgnx	Fair Value Of Warrants Received FairValueOfWarrantsReceived	0	USD
CY2018	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	1	Segment
CY2018	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	1	Segment
CY2018	us-gaap	Use Of Estimates UseOfEstimates	<div style="margin-bottom:9pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:Times New Roman;font-size:10pt;font-style:italic;font-weight:700;line-height:120%;">Use of Estimates</span></div><div style="text-indent:36pt;margin-bottom:9pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:Times New Roman;font-size:10pt;line-height:120%;">The preparation of the financial statements in accordance with generally accepted accounting principles (GAAP) requires the Company to make estimates and judgments in certain circumstances that affect the reported amounts of assets, liabilities, revenues and expenses, and related disclosure of contingent assets and liabilities. In preparing these consolidated financial statements, management has made its best estimates and judgments of certain amounts included in the financial statements, giving due consideration to materiality. On an ongoing basis, the Company evaluates its estimates, including those related to revenue recognition, fair values of assets, stock-based compensation, income taxes, preclinical study and clinical trial accruals and other contingencies. Management bases its estimates on historical experience or on various other assumptions that it believes to be reasonable under the circumstances. Actual results could differ from these estimates.</span></div>
CY2018	us-gaap	Other Than Temporary Impairment Losses Investments Availableforsale Securities OtherThanTemporaryImpairmentLossesInvestmentsAvailableforsaleSecurities	0	USD
CY2018Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	0	USD
CY2018Q4	mgnx	Warrants Fair Value Disclosure WarrantsFairValueDisclosure	1890000	USD
CY2018Q4	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	160849000	USD
CY2017Q4	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	155910000	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents Fair Value Disclosure CashAndCashEquivalentsFairValueDisclosure	146200000	USD
CY2017Q4	us-gaap	Cash And Cash Equivalents Fair Value Disclosure CashAndCashEquivalentsFairValueDisclosure	62500000	USD
CY2018	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	<div style="margin-bottom:9pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:Times New Roman;font-size:10pt;font-style:italic;font-weight:700;line-height:120%;">Concentration of Credit Risk</span></div><div style="text-indent:36pt;margin-bottom:9pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:Times New Roman;font-size:10pt;line-height:120%;">Financial instruments that potentially subject the Company to concentrations of credit risk consist principally of cash, cash equivalents, marketable securities and accounts receivable. </span><span style="background-color:rgb(255,255,255, 0.0);color:#252525;font-family:Times New Roman;font-size:10pt;line-height:120%;">The Company maintains its cash and money market funds with financial institutions that are federally insured. While balances deposited in these institutions often exceed Federal Deposit Insurance Corporation limits, the Company has not experienced any losses on related accounts to date. </span><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:Times New Roman;font-size:10pt;line-height:120%;"> </span><span style="background-color:rgb(255,255,255, 0.0);color:#252525;font-family:Times New Roman;font-size:10pt;line-height:120%;">The Company's investment policy limits investments to certain types of debt securities issued by the U.S. government, its agencies and institutions with investment-grade credit ratings and places restrictions on maturities and concentration by type and issuer.</span><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:Times New Roman;font-size:10pt;line-height:120%;"> The counterparties are various corporations, financial institutions and government agencies of high credit standing.</span></div>
CY2017	us-gaap	Interest Income Other InterestIncomeOther	2400000	USD
CY2018Q4	us-gaap	Impaired Assets To Be Disposed Of By Method Other Than Sale Carrying Value Of Asset ImpairedAssetsToBeDisposedOfByMethodOtherThanSaleCarryingValueOfAsset	0	USD
CY2018Q1	us-gaap	Deferred Revenue Current DeferredRevenueCurrent	7742000	USD
CY2018Q1	us-gaap	Deferred Revenue Noncurrent DeferredRevenueNoncurrent	19576000	USD
CY2018Q1	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-318818000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	-171453000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Per Basic And Diluted Share IncomeLossFromContinuingOperationsPerBasicAndDilutedShare	-4.19
CY2018Q4	us-gaap	Deferred Revenue Current DeferredRevenueCurrent	21721000	USD
CY2018Q4	us-gaap	Deferred Revenue Noncurrent DeferredRevenueNoncurrent	19001000	USD
CY2018Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-490271000	USD
CY2016	us-gaap	Interest Income Other InterestIncomeOther	2300000	USD
CY2017Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	27318000	USD
CY2018	us-gaap	Contract With Customer Liability Increase Decrease For Contract Acquired In Business Combination ContractWithCustomerLiabilityIncreaseDecreaseForContractAcquiredInBusinessCombination	22992000	USD
CY2018	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	9588000	USD
CY2018Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	40722000	USD
CY2018	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	9600000	USD
CY2017Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	93455000	USD
CY2017Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	2000	USD
CY2017Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	63000	USD
CY2017Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	93394000	USD
CY2018	us-gaap	Other Than Temporary Impairment Losses Investments Availableforsale Securities OtherThanTemporaryImpairmentLossesInvestmentsAvailableforsaleSecurities	0	USD
CY2018	us-gaap	Interest Income Other InterestIncomeOther	2300000	USD
CY2018Q4	us-gaap	Construction In Progress Gross ConstructionInProgressGross	218000	USD
CY2017Q4	us-gaap	Construction In Progress Gross ConstructionInProgressGross	32800000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	94647000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	78902000	USD
CY2018Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	37935000	USD
CY2017Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	28919000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	56712000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	49983000	USD
CY2018Q4	mgnx	Property Plant And Equipment Non Cash Additions PropertyPlantAndEquipmentNonCashAdditions	600000	USD
CY2017Q4	mgnx	Property Plant And Equipment Non Cash Additions PropertyPlantAndEquipmentNonCashAdditions	9600000	USD
CY2018	us-gaap	Depreciation Depreciation	9200000	USD
CY2017	us-gaap	Depreciation Depreciation	7000000.0	USD
CY2016	us-gaap	Depreciation Depreciation	6800000	USD
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0
CY2018Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	125000000	shares
CY2018	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	16520000	USD
CY2017	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	14744000	USD
CY2016	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	12165000	USD
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0
CY2018	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P6Y3M
CY2017	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P6Y3M
CY2016	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P6Y3M
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	4504642	shares
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	19.79
CY2017	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P7Y
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod	1269844	shares
CY2018	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	27.18
CY2018	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	285432	shares
CY2018	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	4.22
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	215090	shares
CY2018	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	24.43
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	5273964	shares
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	22.23
CY2018	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P6Y9M18D
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	7969000	USD
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	3544139	shares
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	20.60
CY2018	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P5Y10M24D
CY2018Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	7969000	USD
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber	5086009	shares
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice	22.10
CY2018	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested And Expected To Vest Outstanding Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1	P6Y8M12D
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Aggregate Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue	7969000	USD
CY2018	us-gaap	Stock Issued During Period Shares Share Based Compensation StockIssuedDuringPeriodSharesShareBasedCompensation	274362	shares
CY2017	us-gaap	Stock Issued During Period Shares Share Based Compensation StockIssuedDuringPeriodSharesShareBasedCompensation	253036	shares
CY2016	us-gaap	Stock Issued During Period Shares Share Based Compensation StockIssuedDuringPeriodSharesShareBasedCompensation	526715	shares
CY2018	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	900000	USD
CY2017	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	500000	USD
CY2016	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	1900000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Research DeferredTaxAssetsTaxCreditCarryforwardsResearch	29750000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Research DeferredTaxAssetsTaxCreditCarryforwardsResearch	21284000	USD
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	17.90
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	12.53
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	15.17
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	5200000	USD
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	4200000	USD
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	10800000	USD
CY2018	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested In Period Fair Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1	16400000	USD
CY2017	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested In Period Fair Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1	14600000	USD
CY2016	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested In Period Fair Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1	11600000	USD
CY2018Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	24200000	USD
CY2018	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P2Y7M6D
CY2018	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	0	USD
CY2018Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Domestic DeferredTaxAssetsOperatingLossCarryforwardsDomestic	87284000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Domestic DeferredTaxAssetsOperatingLossCarryforwardsDomestic	50346000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards State And Local DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal	22809000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards State And Local DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal	7551000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Other DeferredTaxAssetsTaxCreditCarryforwardsOther	22580000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Other DeferredTaxAssetsTaxCreditCarryforwardsOther	21708000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Deferred Rent DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsDeferredRent	3118000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Deferred Rent DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsDeferredRent	3385000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Deferred Income DeferredTaxAssetsDeferredIncome	3736000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Deferred Income DeferredTaxAssetsDeferredIncome	2982000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Property Plant And Equipment DeferredTaxAssetsPropertyPlantAndEquipment	0	USD
CY2017Q4	us-gaap	Deferred Tax Assets Property Plant And Equipment DeferredTaxAssetsPropertyPlantAndEquipment	155000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	6854000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	5847000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	176131000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	113258000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	172457000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	112453000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	3674000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	805000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	1911000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	0	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Prepaid Expenses DeferredTaxLiabilitiesPrepaidExpenses	1763000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Prepaid Expenses DeferredTaxLiabilitiesPrepaidExpenses	805000	USD
CY2018Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	3674000	USD
CY2017Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	805000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	0	USD
CY2017Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	0	USD
CY2018Q4	mgnx	Operating Loss Carryforwards Not Subject To Limitation OperatingLossCarryforwardsNotSubjectToLimitation	402100000	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount	18600000	USD
CY2018	mgnx	Effective Income Tax Rate Reconciliation Sharebased Compensation Excess Tax Benefit Tax Effected Amount EffectiveIncomeTaxRateReconciliationSharebasedCompensationExcessTaxBenefitTaxEffectedAmount	6500000	USD
CY2018	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-36005000	USD
CY2017	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-6869000	USD
CY2016	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-20489000	USD
CY2018	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	-11133000	USD
CY2017	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	-735000	USD
CY2016	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	-3116000	USD
CY2018	mgnx	Effective Income Tax Rate Reconciliation Deferred Tax Adjustments Amount EffectiveIncomeTaxRateReconciliationDeferredTaxAdjustmentsAmount	-4435000	USD
CY2017	mgnx	Effective Income Tax Rate Reconciliation Deferred Tax Adjustments Amount EffectiveIncomeTaxRateReconciliationDeferredTaxAdjustmentsAmount	607000	USD
CY2016	mgnx	Effective Income Tax Rate Reconciliation Deferred Tax Adjustments Amount EffectiveIncomeTaxRateReconciliationDeferredTaxAdjustmentsAmount	173000	USD
CY2018	mgnx	Effective Income Tax Reconciliation State Deferred Taxes Adjustments Amount EffectiveIncomeTaxReconciliationStateDeferredTaxesAdjustmentsAmount	0	USD
CY2017	mgnx	Effective Income Tax Reconciliation State Deferred Taxes Adjustments Amount EffectiveIncomeTaxReconciliationStateDeferredTaxesAdjustmentsAmount	485000	USD
CY2016	mgnx	Effective Income Tax Reconciliation State Deferred Taxes Adjustments Amount EffectiveIncomeTaxReconciliationStateDeferredTaxesAdjustmentsAmount	32000	USD
CY2018	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	0	USD
CY2017	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	39447000	USD
CY2016	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	0	USD
CY2018	us-gaap	Income Tax Reconciliation Tax Credits Research IncomeTaxReconciliationTaxCreditsResearch	8466000	USD
CY2017	us-gaap	Income Tax Reconciliation Tax Credits Research IncomeTaxReconciliationTaxCreditsResearch	8455000	USD
CY2016	us-gaap	Income Tax Reconciliation Tax Credits Research IncomeTaxReconciliationTaxCreditsResearch	2551000	USD
CY2018	us-gaap	Income Tax Reconciliation Tax Credits Other IncomeTaxReconciliationTaxCreditsOther	872000	USD
CY2017	us-gaap	Income Tax Reconciliation Tax Credits Other IncomeTaxReconciliationTaxCreditsOther	1853000	USD
CY2016	us-gaap	Income Tax Reconciliation Tax Credits Other IncomeTaxReconciliationTaxCreditsOther	571000	USD
CY2018	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	148000	USD
CY2017	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	276000	USD
CY2016	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	145000	USD
CY2018	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	758000	USD
CY2017	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	2067000	USD
CY2016	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	1997000	USD
CY2018	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	60005000	USD
CY2017	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-24000000	USD
CY2016	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	24444000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	0	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	0	USD
CY2016	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	0	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	3395000	USD
CY2016Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	2465000	USD
CY2015Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	2425000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	642000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	569000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	308000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	281000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	361000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	268000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	4318000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	3395000	USD
CY2016Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	2465000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	4500000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	3400000	USD
CY2018	mgnx	Number Of Lease NumberOfLease	5	Lease
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due Future Minimum Sublease Rentals OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentals	1100000	USD
CY2015Q3	us-gaap	Payments For Proceeds From Tenant Allowance PaymentsForProceedsFromTenantAllowance	5100000	USD
CY2017Q3	us-gaap	Payments For Proceeds From Tenant Allowance PaymentsForProceedsFromTenantAllowance	7500000	USD
CY2018Q4	us-gaap	Deferred Rent Credit DeferredRentCredit	11300000	USD
CY2017Q4	us-gaap	Deferred Rent Credit DeferredRentCredit	12300000	USD
CY2018	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	4400000	USD
CY2017	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	3100000	USD
CY2016	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	3000000.0	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	6323000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	4757000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	4724000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	4865000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	4680000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	13786000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	39135000	USD
CY2012	mgnx	Employees Eligible Age To Participate In Benefit Plan EmployeesEligibleAgeToParticipateInBenefitPlan	P21Y
CY2012	us-gaap	Defined Contribution Plan Maximum Annual Contributions Per Employee Percent DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent	1
CY2018	mgnx	Defined Contribution Plan Employees Contribution Vested Percentage DefinedContributionPlanEmployeesContributionVestedPercentage	1
CY2018	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	1300000	USD
CY2017	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	1100000	USD
CY2016	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	1000000.0	USD
CY2018Q1	us-gaap	Revenues Revenues	4695000	USD
CY2018Q2	us-gaap	Revenues Revenues	18834000	USD
CY2018Q3	us-gaap	Revenues Revenues	20798000	USD
CY2018Q4	us-gaap	Revenues Revenues	15794000	USD
CY2018Q1	us-gaap	Net Income Loss NetIncomeLoss	-49536000	USD
CY2018Q2	us-gaap	Net Income Loss NetIncomeLoss	-43244000	USD
CY2018Q3	us-gaap	Net Income Loss NetIncomeLoss	-34029000	USD
CY2018Q4	us-gaap	Net Income Loss NetIncomeLoss	-44644000	USD
CY2018Q1	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-1.34
CY2018Q2	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-1.03
CY2018Q3	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-0.81
CY2018Q4	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-1.06
CY2017Q1	us-gaap	Revenues Revenues	2055000	USD
CY2017Q2	us-gaap	Revenues Revenues	1666000	USD
CY2017Q3	us-gaap	Revenues Revenues	1663000	USD
CY2017Q4	us-gaap	Revenues Revenues	152359000	USD
CY2017Q1	us-gaap	Net Income Loss NetIncomeLoss	-37655000	USD
CY2017Q2	us-gaap	Net Income Loss NetIncomeLoss	-40654000	USD
CY2017Q3	us-gaap	Net Income Loss NetIncomeLoss	-47043000	USD
CY2017Q4	us-gaap	Net Income Loss NetIncomeLoss	105727000	USD
CY2017Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-1.08
CY2017Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-1.14
CY2017Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-1.28
CY2017Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.87
CY2017Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-1.08
CY2017Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-1.14
CY2017Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-1.28
CY2017Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.80

Files In Submission

Name	View Source	Status
0001125345-19-000046-index-headers.html	Edgar Link	pending
0001125345-19-000046-index.html	Edgar Link	pending
0001125345-19-000046.txt	Edgar Link	pending
0001125345-19-000046-xbrl.zip	Edgar Link	pending
exhibit1018to2018form1.htm	Edgar Link	pending
exhibit1019to2018form1.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
mgnx-20181231.htm	Edgar Link	pending
mgnx-20181231.xsd	Edgar Link	pending
mgnx-20181231_cal.xml	Edgar Link	unprocessable
mgnx-20181231_def.xml	Edgar Link	unprocessable
mgnx-20181231_g1.jpg	Edgar Link	pending
mgnx-20181231_g2.jpg	Edgar Link	pending
mgnx-20181231_g3.jpg	Edgar Link	pending
mgnx-20181231_g4.jpg	Edgar Link	pending
mgnx-20181231_g5.jpg	Edgar Link	pending
mgnx-20181231_g6.jpg	Edgar Link	pending
mgnx-20181231_g7.jpg	Edgar Link	pending
mgnx-20181231_htm.xml	Edgar Link	completed
mgnx-20181231_lab.xml	Edgar Link	unprocessable
mgnx-20181231_pre.xml	Edgar Link	unprocessable
mgnxexhibit23-1201810xk.htm	Edgar Link	pending
mgnxexhibit31-1201810xk.htm	Edgar Link	pending
mgnxexhibit31-2201810xk.htm	Edgar Link	pending
mgnxexhibit32-1201810xk.htm	Edgar Link	pending
mgnxexhibit32-2201810xk.htm	Edgar Link	pending
R1.htm	Edgar Link	pending
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report.css	Edgar Link	pending
Show.js	Edgar Link	pending

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$MGNX
MACROGENICS INC Stock $mgnx

2019 Q1 Form 10-K Financial Statement

#000112534519000046 Filed on February 26, 2019

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$MGNX MACROGENICS INC Stock $mgnx

2019 Q1 Form 10-K Financial Statement

#000112534519000046 Filed on February 26, 2019

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$MGNX
MACROGENICS INC Stock $mgnx