2021 Form 10-K Financial Statement
#000155837022002358 Filed on February 28, 2022
Income Statement
Concept | 2021 | 2020 Q4 | 2020 |
---|
Balance Sheet
Concept | 2021 | 2020 Q4 | 2020 |
---|---|---|---|
SHORT-TERM ASSETS | |||
Cash & Short-Term Investments | $478.8M | $293.9M | $293.9M |
YoY Change | 62.9% | 66.78% | 66.8% |
Cash & Equivalents | $478.8M | $293.9M | $293.9M |
Short-Term Investments | $0.00 | ||
Other Short-Term Assets | $7.322M | $7.900M | $7.900M |
YoY Change | -7.32% | 46.3% | 46.3% |
Inventory | |||
Prepaid Expenses | |||
Receivables | $9.812M | $0.00 | $0.00 |
Other Receivables | $4.115M | $22.50M | $22.50M |
Total Short-Term Assets | $500.0M | $324.3M | $324.3M |
YoY Change | 54.18% | 55.22% | 55.24% |
LONG-TERM ASSETS | |||
Property, Plant & Equipment | $17.06M | $5.760M | $19.80M |
YoY Change | -13.86% | -17.63% | -12.39% |
Goodwill | |||
YoY Change | |||
Intangibles | |||
YoY Change | |||
Long-Term Investments | |||
YoY Change | |||
Other Assets | $8.711M | $10.99M | $11.00M |
YoY Change | -20.81% | 190.33% | 189.47% |
Total Long-Term Assets | $25.77M | $30.82M | $30.80M |
YoY Change | -16.34% | 16.89% | 16.67% |
TOTAL ASSETS | |||
Total Short-Term Assets | $500.0M | $324.3M | $324.3M |
Total Long-Term Assets | $25.77M | $30.82M | $30.80M |
Total Assets | $525.8M | $355.1M | $355.1M |
YoY Change | 48.06% | 50.93% | 50.91% |
SHORT-TERM LIABILITIES | |||
YoY Change | |||
Accounts Payable | $18.43M | $9.538M | $9.500M |
YoY Change | 94.04% | -3.98% | -4.04% |
Accrued Expenses | $32.08M | $37.10M | $37.10M |
YoY Change | -13.52% | 43.24% | 43.24% |
Deferred Revenue | $29.25M | ||
YoY Change | 9365.7% | ||
Short-Term Debt | $0.00 | $0.00 | $0.00 |
YoY Change | |||
Long-Term Debt Due | $6.100M | $2.100M | $2.100M |
YoY Change | 190.48% | ||
Total Short-Term Liabilities | $100.9M | $122.3M | $122.3M |
YoY Change | -17.46% | 58.02% | 58.01% |
LONG-TERM LIABILITIES | |||
Long-Term Debt | $0.00 | $0.00 | $0.00 |
YoY Change | -100.0% | -100.0% | |
Other Long-Term Liabilities | $99.23M | $2.586M | $143.2M |
YoY Change | -30.7% | 265.77% | -38.25% |
Total Long-Term Liabilities | $99.23M | $2.586M | $143.2M |
YoY Change | -30.7% | 265.77% | -38.8% |
TOTAL LIABILITIES | |||
Total Short-Term Liabilities | $100.9M | $122.3M | $122.3M |
Total Long-Term Liabilities | $99.23M | $2.586M | $143.2M |
Total Liabilities | $200.2M | $265.5M | $265.5M |
YoY Change | -24.6% | -14.73% | -14.74% |
SHAREHOLDERS EQUITY | |||
Retained Earnings | -$1.332B | ||
YoY Change | 3.45% | ||
Common Stock | $1.421B | ||
YoY Change | 17.34% | ||
Preferred Stock | |||
YoY Change | |||
Treasury Stock (at cost) | |||
YoY Change | |||
Treasury Stock Shares | |||
Shareholders Equity | $325.6M | $89.57M | $89.60M |
YoY Change | |||
Total Liabilities & Shareholders Equity | $525.8M | $355.1M | $355.1M |
YoY Change | 48.06% | 50.93% | 50.91% |
Cashflow Statement
Concept | 2021 | 2020 Q4 | 2020 |
---|
Facts In Submission
Frame | Concept Type | Concept / XBRL Key | Value | Unit |
---|---|---|---|---|
CY2021Q4 | us-gaap |
Commitments And Contingencies
CommitmentsAndContingencies
|
||
CY2019 | us-gaap |
Weighted Average Number Of Diluted Shares Outstanding
WeightedAverageNumberOfDilutedSharesOutstanding
|
148311000 | |
CY2020Q4 | us-gaap |
Preferred Stock Shares Issued
PreferredStockSharesIssued
|
0 | |
CY2021Q4 | us-gaap |
Preferred Stock Shares Issued
PreferredStockSharesIssued
|
0 | |
CY2020Q4 | us-gaap |
Commitments And Contingencies
CommitmentsAndContingencies
|
||
CY2021 | us-gaap |
Weighted Average Number Of Diluted Shares Outstanding
WeightedAverageNumberOfDilutedSharesOutstanding
|
206147000 | |
CY2020 | us-gaap |
Weighted Average Number Of Diluted Shares Outstanding
WeightedAverageNumberOfDilutedSharesOutstanding
|
176153000 | |
CY2021 | dei |
Entity Central Index Key
EntityCentralIndexKey
|
0000855654 | |
CY2021 | dei |
Document Fiscal Year Focus
DocumentFiscalYearFocus
|
2021 | |
CY2021 | dei |
Document Fiscal Period Focus
DocumentFiscalPeriodFocus
|
FY | |
CY2021Q4 | us-gaap |
Preferred Stock Value
PreferredStockValue
|
||
CY2020Q4 | us-gaap |
Preferred Stock Value
PreferredStockValue
|
||
CY2021Q4 | us-gaap |
Common Stock Shares Issued
CommonStockSharesIssued
|
220361000 | |
CY2020Q4 | us-gaap |
Common Stock Shares Outstanding
CommonStockSharesOutstanding
|
194998000 | |
CY2021Q4 | us-gaap |
Common Stock Shares Outstanding
CommonStockSharesOutstanding
|
220361000 | |
CY2020Q4 | us-gaap |
Common Stock Shares Issued
CommonStockSharesIssued
|
194998000 | |
CY2021 | us-gaap |
Earnings Per Share Diluted
EarningsPerShareDiluted
|
-0.68 | |
CY2020 | us-gaap |
Earnings Per Share Diluted
EarningsPerShareDiluted
|
-0.25 | |
CY2019 | us-gaap |
Earnings Per Share Diluted
EarningsPerShareDiluted
|
-0.70 | |
CY2021 | dei |
Amendment Flag
AmendmentFlag
|
false | |
CY2021 | dei |
Document Type
DocumentType
|
10-K | |
CY2021 | dei |
Document Annual Report
DocumentAnnualReport
|
true | |
CY2021 | dei |
Document Period End Date
DocumentPeriodEndDate
|
2021-12-31 | |
CY2021 | dei |
Current Fiscal Year End Date
CurrentFiscalYearEndDate
|
--12-31 | |
CY2021 | dei |
Document Transition Report
DocumentTransitionReport
|
false | |
CY2021 | dei |
Entity File Number
EntityFileNumber
|
0-17999 | |
CY2021 | dei |
Entity Registrant Name
EntityRegistrantName
|
ImmunoGen, Inc. | |
CY2021 | dei |
Entity Incorporation State Country Code
EntityIncorporationStateCountryCode
|
MA | |
CY2021 | dei |
Entity Tax Identification Number
EntityTaxIdentificationNumber
|
04-2726691 | |
CY2021 | dei |
Entity Address Address Line1
EntityAddressAddressLine1
|
830 Winter Street | |
CY2021 | dei |
Entity Address City Or Town
EntityAddressCityOrTown
|
Waltham | |
CY2021 | dei |
Entity Address State Or Province
EntityAddressStateOrProvince
|
MA | |
CY2021 | dei |
Entity Address Postal Zip Code
EntityAddressPostalZipCode
|
02451 | |
CY2021 | dei |
City Area Code
CityAreaCode
|
781 | |
CY2021 | dei |
Local Phone Number
LocalPhoneNumber
|
895-0600 | |
CY2021 | dei |
Security12b Title
Security12bTitle
|
Common Stock | |
CY2021 | dei |
Trading Symbol
TradingSymbol
|
IMGN | |
CY2021 | dei |
Security Exchange Name
SecurityExchangeName
|
NASDAQ | |
CY2021 | dei |
Entity Well Known Seasoned Issuer
EntityWellKnownSeasonedIssuer
|
Yes | |
CY2021 | dei |
Entity Voluntary Filers
EntityVoluntaryFilers
|
No | |
CY2021 | dei |
Entity Current Reporting Status
EntityCurrentReportingStatus
|
Yes | |
CY2021 | dei |
Entity Interactive Data Current
EntityInteractiveDataCurrent
|
Yes | |
CY2021 | dei |
Entity Filer Category
EntityFilerCategory
|
Large Accelerated Filer | |
CY2021 | dei |
Entity Small Business
EntitySmallBusiness
|
false | |
CY2021 | dei |
Entity Emerging Growth Company
EntityEmergingGrowthCompany
|
false | |
CY2021 | dei |
Icfr Auditor Attestation Flag
IcfrAuditorAttestationFlag
|
true | |
CY2021 | dei |
Entity Shell Company
EntityShellCompany
|
false | |
CY2021Q2 | dei |
Entity Public Float
EntityPublicFloat
|
1314157331 | |
CY2022Q1 | dei |
Entity Common Stock Shares Outstanding
EntityCommonStockSharesOutstanding
|
220530899 | |
CY2021 | dei |
Auditor Firm
AuditorFirmId
|
42 | |
CY2021 | dei |
Auditor Name
AuditorName
|
Ernst & Young LLP | |
CY2021 | dei |
Auditor Location
AuditorLocation
|
Boston, Massachusetts | |
CY2021Q4 | us-gaap |
Cash And Cash Equivalents At Carrying Value
CashAndCashEquivalentsAtCarryingValue
|
478750000 | |
CY2020Q4 | us-gaap |
Cash And Cash Equivalents At Carrying Value
CashAndCashEquivalentsAtCarryingValue
|
293856000 | |
CY2021Q4 | us-gaap |
Accounts Receivable Gross Current
AccountsReceivableGrossCurrent
|
4467000 | |
CY2020Q4 | us-gaap |
Accounts Receivable Gross Current
AccountsReceivableGrossCurrent
|
35000 | |
CY2021Q4 | us-gaap |
Unbilled Receivables Current
UnbilledReceivablesCurrent
|
2345000 | |
CY2020Q4 | us-gaap |
Unbilled Receivables Current
UnbilledReceivablesCurrent
|
11000 | |
CY2021Q4 | us-gaap |
Contract With Customer Asset Gross Current
ContractWithCustomerAssetGrossCurrent
|
3000000 | |
CY2021Q4 | imgn |
Non Cash Royalty Receivable
NonCashRoyaltyReceivable
|
4115000 | |
CY2020Q4 | imgn |
Non Cash Royalty Receivable
NonCashRoyaltyReceivable
|
22451000 | |
CY2021Q4 | us-gaap |
Prepaid Expense And Other Assets Current
PrepaidExpenseAndOtherAssetsCurrent
|
7322000 | |
CY2020Q4 | us-gaap |
Prepaid Expense And Other Assets Current
PrepaidExpenseAndOtherAssetsCurrent
|
7901000 | |
CY2021Q4 | us-gaap |
Assets Current
AssetsCurrent
|
499999000 | |
CY2020Q4 | us-gaap |
Assets Current
AssetsCurrent
|
324254000 | |
CY2021Q4 | us-gaap |
Property Plant And Equipment Net
PropertyPlantAndEquipmentNet
|
4663000 | |
CY2020Q4 | us-gaap |
Property Plant And Equipment Net
PropertyPlantAndEquipmentNet
|
5760000 | |
CY2021Q4 | us-gaap |
Operating Lease Right Of Use Asset
OperatingLeaseRightOfUseAsset
|
12392000 | |
CY2020Q4 | us-gaap |
Operating Lease Right Of Use Asset
OperatingLeaseRightOfUseAsset
|
14072000 | |
CY2021Q4 | us-gaap |
Other Assets Noncurrent
OtherAssetsNoncurrent
|
8711000 | |
CY2020Q4 | us-gaap |
Other Assets Noncurrent
OtherAssetsNoncurrent
|
10986000 | |
CY2021Q4 | us-gaap |
Assets
Assets
|
525765000 | |
CY2020Q4 | us-gaap |
Assets
Assets
|
355072000 | |
CY2021Q4 | us-gaap |
Accounts Payable Current
AccountsPayableCurrent
|
18434000 | |
CY2020Q4 | us-gaap |
Accounts Payable Current
AccountsPayableCurrent
|
9538000 | |
CY2021Q4 | us-gaap |
Employee Related Liabilities Current
EmployeeRelatedLiabilitiesCurrent
|
5469000 | |
CY2020Q4 | us-gaap |
Employee Related Liabilities Current
EmployeeRelatedLiabilitiesCurrent
|
4620000 | |
CY2021Q4 | us-gaap |
Other Accrued Liabilities Current
OtherAccruedLiabilitiesCurrent
|
23077000 | |
CY2020Q4 | us-gaap |
Other Accrued Liabilities Current
OtherAccruedLiabilitiesCurrent
|
29320000 | |
CY2020Q4 | us-gaap |
Debt Instrument Interest Rate Stated Percentage
DebtInstrumentInterestRateStatedPercentage
|
0.045 | |
CY2021Q4 | us-gaap |
Debt Instrument Interest Rate Stated Percentage
DebtInstrumentInterestRateStatedPercentage
|
0.045 | |
CY2021Q4 | us-gaap |
Deferred Finance Costs Current Net
DeferredFinanceCostsCurrentNet
|
0 | |
CY2020Q4 | us-gaap |
Deferred Finance Costs Current Net
DeferredFinanceCostsCurrentNet
|
7000 | |
CY2020Q4 | us-gaap |
Convertible Debt Current
ConvertibleDebtCurrent
|
2093000 | |
CY2021 | imgn |
Deferred Financing Costs Liability Sale Of Future Royalties Current
DeferredFinancingCostsLiabilitySaleOfFutureRoyaltiesCurrent
|
198000 | |
CY2020 | imgn |
Deferred Financing Costs Liability Sale Of Future Royalties Current
DeferredFinancingCostsLiabilitySaleOfFutureRoyaltiesCurrent
|
319000 | |
CY2021Q4 | imgn |
Liability Related To Sale Of Future Royalties Current
LiabilityRelatedToSaleOfFutureRoyaltiesCurrent
|
6077000 | |
CY2020Q4 | imgn |
Liability Related To Sale Of Future Royalties Current
LiabilityRelatedToSaleOfFutureRoyaltiesCurrent
|
44357000 | |
CY2021Q4 | us-gaap |
Operating Lease Liability Current
OperatingLeaseLiabilityCurrent
|
3537000 | |
CY2020Q4 | us-gaap |
Operating Lease Liability Current
OperatingLeaseLiabilityCurrent
|
3146000 | |
CY2020Q4 | us-gaap |
Retained Earnings Accumulated Deficit
RetainedEarningsAccumulatedDeficit
|
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CY2021Q4 | us-gaap |
Stockholders Equity
StockholdersEquity
|
325586000 | |
CY2020Q4 | us-gaap |
Stockholders Equity
StockholdersEquity
|
89570000 | |
CY2021Q4 | us-gaap |
Common Stock Shares Authorized
CommonStockSharesAuthorized
|
300000000 | |
CY2021Q4 | us-gaap |
Common Stock Value
CommonStockValue
|
2204000 | |
CY2020Q4 | us-gaap |
Common Stock Value
CommonStockValue
|
1950000 | |
CY2021Q4 | us-gaap |
Additional Paid In Capital Common Stock
AdditionalPaidInCapitalCommonStock
|
1794525000 | |
CY2020Q4 | us-gaap |
Additional Paid In Capital Common Stock
AdditionalPaidInCapitalCommonStock
|
1419460000 | |
CY2021Q4 | us-gaap |
Retained Earnings Accumulated Deficit
RetainedEarningsAccumulatedDeficit
|
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CY2021Q4 | us-gaap |
Liabilities And Stockholders Equity
LiabilitiesAndStockholdersEquity
|
525765000 | |
CY2021Q4 | us-gaap |
Contract With Customer Liability Current
ContractWithCustomerLiabilityCurrent
|
44351000 | |
CY2020Q4 | us-gaap |
Contract With Customer Liability Current
ContractWithCustomerLiabilityCurrent
|
29249000 | |
CY2021Q4 | us-gaap |
Liabilities Current
LiabilitiesCurrent
|
100945000 | |
CY2020Q4 | us-gaap |
Liabilities Current
LiabilitiesCurrent
|
122323000 | |
CY2021Q4 | us-gaap |
Contract With Customer Liability Noncurrent
ContractWithCustomerLiabilityNoncurrent
|
47717000 | |
CY2020Q4 | us-gaap |
Contract With Customer Liability Noncurrent
ContractWithCustomerLiabilityNoncurrent
|
80860000 | |
CY2021Q4 | us-gaap |
Operating Lease Liability Noncurrent
OperatingLeaseLiabilityNoncurrent
|
15244000 | |
CY2020Q4 | us-gaap |
Operating Lease Liability Noncurrent
OperatingLeaseLiabilityNoncurrent
|
18651000 | |
CY2021Q4 | imgn |
Deferred Financing Costs Liability Sale Of Future Royalties Noncurrent
DeferredFinancingCostsLiabilitySaleOfFutureRoyaltiesNoncurrent
|
381000 | |
CY2020Q4 | imgn |
Deferred Financing Costs Liability Sale Of Future Royalties Noncurrent
DeferredFinancingCostsLiabilitySaleOfFutureRoyaltiesNoncurrent
|
584000 | |
CY2021Q4 | imgn |
Liability Related To Sale Of Future Royalties Noncurrent
LiabilityRelatedToSaleOfFutureRoyaltiesNoncurrent
|
34967000 | |
CY2020Q4 | imgn |
Liability Related To Sale Of Future Royalties Noncurrent
LiabilityRelatedToSaleOfFutureRoyaltiesNoncurrent
|
41082000 | |
CY2021Q4 | us-gaap |
Other Liabilities Noncurrent
OtherLiabilitiesNoncurrent
|
1306000 | |
CY2020Q4 | us-gaap |
Other Liabilities Noncurrent
OtherLiabilitiesNoncurrent
|
2586000 | |
CY2021Q4 | us-gaap |
Liabilities
Liabilities
|
200179000 | |
CY2020Q4 | us-gaap |
Liabilities
Liabilities
|
265502000 | |
CY2020Q4 | us-gaap |
Preferred Stock Par Or Stated Value Per Share
PreferredStockParOrStatedValuePerShare
|
0.01 | |
CY2021Q4 | us-gaap |
Preferred Stock Par Or Stated Value Per Share
PreferredStockParOrStatedValuePerShare
|
0.01 | |
CY2020Q4 | us-gaap |
Preferred Stock Shares Authorized
PreferredStockSharesAuthorized
|
5000000 | |
CY2021Q4 | us-gaap |
Preferred Stock Shares Authorized
PreferredStockSharesAuthorized
|
5000000 | |
CY2020Q4 | us-gaap |
Preferred Stock Shares Outstanding
PreferredStockSharesOutstanding
|
0 | |
CY2021Q4 | us-gaap |
Preferred Stock Shares Outstanding
PreferredStockSharesOutstanding
|
0 | |
CY2020Q4 | us-gaap |
Common Stock Par Or Stated Value Per Share
CommonStockParOrStatedValuePerShare
|
0.01 | |
CY2021Q4 | us-gaap |
Common Stock Par Or Stated Value Per Share
CommonStockParOrStatedValuePerShare
|
0.01 | |
CY2020Q4 | us-gaap |
Common Stock Shares Authorized
CommonStockSharesAuthorized
|
300000000 | |
CY2020Q4 | us-gaap |
Liabilities And Stockholders Equity
LiabilitiesAndStockholdersEquity
|
355072000 | |
CY2021 | us-gaap |
Revenue From Contract With Customer Including Assessed Tax
RevenueFromContractWithCustomerIncludingAssessedTax
|
69856000 | |
CY2020 | us-gaap |
Revenue From Contract With Customer Including Assessed Tax
RevenueFromContractWithCustomerIncludingAssessedTax
|
132299000 | |
CY2019 | us-gaap |
Revenue From Contract With Customer Including Assessed Tax
RevenueFromContractWithCustomerIncludingAssessedTax
|
82271000 | |
CY2021 | us-gaap |
Research And Development Expense
ResearchAndDevelopmentExpense
|
151117000 | |
CY2020 | us-gaap |
Research And Development Expense
ResearchAndDevelopmentExpense
|
114592000 | |
CY2019 | us-gaap |
Research And Development Expense
ResearchAndDevelopmentExpense
|
114522000 | |
CY2021 | us-gaap |
General And Administrative Expense
GeneralAndAdministrativeExpense
|
43812000 | |
CY2020 | us-gaap |
General And Administrative Expense
GeneralAndAdministrativeExpense
|
38600000 | |
CY2019 | us-gaap |
General And Administrative Expense
GeneralAndAdministrativeExpense
|
38489000 | |
CY2020 | us-gaap |
Restructuring Charges
RestructuringCharges
|
1487000 | |
CY2019 | us-gaap |
Restructuring Charges
RestructuringCharges
|
21433000 | |
CY2021 | us-gaap |
Operating Expenses
OperatingExpenses
|
194929000 | |
CY2019 | us-gaap |
Weighted Average Number Of Shares Outstanding Basic
WeightedAverageNumberOfSharesOutstandingBasic
|
148311000 | |
CY2021 | us-gaap |
Comprehensive Income Net Of Tax
ComprehensiveIncomeNetOfTax
|
-139303000 | |
CY2020 | us-gaap |
Comprehensive Income Net Of Tax
ComprehensiveIncomeNetOfTax
|
-44372000 | |
CY2019 | us-gaap |
Comprehensive Income Net Of Tax
ComprehensiveIncomeNetOfTax
|
-104133000 | |
CY2018Q4 | us-gaap |
Stockholders Equity
StockholdersEquity
|
10972000 | |
CY2019 | us-gaap |
Net Income Loss
NetIncomeLoss
|
-104133000 | |
CY2019 | imgn |
Stock Issued During Period Value Stock Options Exercised And Employee Stock Purchase Plan
StockIssuedDuringPeriodValueStockOptionsExercisedAndEmployeeStockPurchasePlan
|
2873000 | |
CY2019 | us-gaap |
Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value
AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
|
13830000 | |
CY2019 | imgn |
Adjustments To Additional Paid In Capital Directors Deferred Share Based Compensation
AdjustmentsToAdditionalPaidInCapitalDirectorsDeferredShareBasedCompensation
|
337000 | |
CY2019Q4 | us-gaap |
Stockholders Equity
StockholdersEquity
|
-76121000 | |
CY2020 | us-gaap |
Net Income Loss
NetIncomeLoss
|
-44372000 | |
CY2020 | imgn |
Stock Issued During Period Value Stock Options Exercised And Employee Stock Purchase Plan
StockIssuedDuringPeriodValueStockOptionsExercisedAndEmployeeStockPurchasePlan
|
1471000 | |
CY2020 | us-gaap |
Operating Expenses
OperatingExpenses
|
154679000 | |
CY2019 | us-gaap |
Operating Expenses
OperatingExpenses
|
174444000 | |
CY2021 | us-gaap |
Operating Income Loss
OperatingIncomeLoss
|
-125073000 | |
CY2020 | us-gaap |
Operating Income Loss
OperatingIncomeLoss
|
-22380000 | |
CY2019 | us-gaap |
Operating Income Loss
OperatingIncomeLoss
|
-92173000 | |
CY2021 | us-gaap |
Investment Income Net
InvestmentIncomeNet
|
51000 | |
CY2020 | us-gaap |
Investment Income Net
InvestmentIncomeNet
|
729000 | |
CY2019 | us-gaap |
Investment Income Net
InvestmentIncomeNet
|
4424000 | |
CY2021 | imgn |
Non Cash Interest Expense From Sale Of Future Royalties
NonCashInterestExpenseFromSaleOfFutureRoyalties
|
13103000 | |
CY2020 | imgn |
Non Cash Interest Expense From Sale Of Future Royalties
NonCashInterestExpenseFromSaleOfFutureRoyalties
|
23107000 | |
CY2019 | imgn |
Non Cash Interest Expense From Sale Of Future Royalties
NonCashInterestExpenseFromSaleOfFutureRoyalties
|
16879000 | |
CY2021 | us-gaap |
Interest Expense Debt
InterestExpenseDebt
|
47000 | |
CY2020 | us-gaap |
Interest Expense Debt
InterestExpenseDebt
|
95000 | |
CY2019 | us-gaap |
Interest Expense Debt
InterestExpenseDebt
|
95000 | |
CY2021 | us-gaap |
Other Nonoperating Income Expense
OtherNonoperatingIncomeExpense
|
-1131000 | |
CY2020 | us-gaap |
Other Nonoperating Income Expense
OtherNonoperatingIncomeExpense
|
481000 | |
CY2019 | us-gaap |
Other Nonoperating Income Expense
OtherNonoperatingIncomeExpense
|
590000 | |
CY2021 | us-gaap |
Net Income Loss
NetIncomeLoss
|
-139303000 | |
CY2020 | us-gaap |
Net Income Loss
NetIncomeLoss
|
-44372000 | |
CY2019 | us-gaap |
Net Income Loss
NetIncomeLoss
|
-104133000 | |
CY2021 | us-gaap |
Earnings Per Share Basic
EarningsPerShareBasic
|
-0.68 | |
CY2020 | us-gaap |
Earnings Per Share Basic
EarningsPerShareBasic
|
-0.25 | |
CY2019 | us-gaap |
Earnings Per Share Basic
EarningsPerShareBasic
|
-0.70 | |
CY2021 | us-gaap |
Weighted Average Number Of Shares Outstanding Basic
WeightedAverageNumberOfSharesOutstandingBasic
|
206147000 | |
CY2020 | us-gaap |
Weighted Average Number Of Shares Outstanding Basic
WeightedAverageNumberOfSharesOutstandingBasic
|
176153000 | |
CY2020 | us-gaap |
Stock Issued During Period Value New Issues
StockIssuedDuringPeriodValueNewIssues
|
194271000 | |
CY2020 | us-gaap |
Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value
AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
|
13978000 | |
CY2020 | imgn |
Adjustments To Additional Paid In Capital Directors Deferred Share Based Compensation
AdjustmentsToAdditionalPaidInCapitalDirectorsDeferredShareBasedCompensation
|
343000 | |
CY2020Q4 | us-gaap |
Stockholders Equity
StockholdersEquity
|
89570000 | |
CY2021 | us-gaap |
Net Income Loss
NetIncomeLoss
|
-139303000 | |
CY2021 | imgn |
Stock Issued During Period Value Stock Options Exercised And Employee Stock Purchase Plan
StockIssuedDuringPeriodValueStockOptionsExercisedAndEmployeeStockPurchasePlan
|
3769000 | |
CY2021 | us-gaap |
Stock Issued During Period Value New Issues
StockIssuedDuringPeriodValueNewIssues
|
154030000 | |
CY2021 | imgn |
Prefunded Warrant Net Of Issuance Costs
PrefundedWarrantNetOfIssuanceCosts
|
199045000 | |
CY2021 | us-gaap |
Debt Conversion Converted Instrument Amount1
DebtConversionConvertedInstrumentAmount1
|
1000000 | |
CY2021 | us-gaap |
Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value
AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
|
16794000 | |
CY2021 | imgn |
Stock Issued During Period Value Directors Deferred Share Conversion Of Units
StockIssuedDuringPeriodValueDirectorsDeferredShareConversionOfUnits
|
681000 | |
CY2021Q4 | us-gaap |
Stockholders Equity
StockholdersEquity
|
325586000 | |
CY2021 | us-gaap |
Profit Loss
ProfitLoss
|
-139303000 | |
CY2020 | us-gaap |
Profit Loss
ProfitLoss
|
-44372000 | |
CY2019 | us-gaap |
Profit Loss
ProfitLoss
|
-104133000 | |
CY2021 | imgn |
Non Cash Royalty Revenue Related To Sale Of Future Royalties
NonCashRoyaltyRevenueRelatedToSaleOfFutureRoyalties
|
39155000 | |
CY2020 | imgn |
Non Cash Royalty Revenue Related To Sale Of Future Royalties
NonCashRoyaltyRevenueRelatedToSaleOfFutureRoyalties
|
68529000 | |
CY2019 | imgn |
Non Cash Royalty Revenue Related To Sale Of Future Royalties
NonCashRoyaltyRevenueRelatedToSaleOfFutureRoyalties
|
47415000 | |
CY2021 | imgn |
Non Cash Interest Expense From Sale Of Future Royalties
NonCashInterestExpenseFromSaleOfFutureRoyalties
|
13103000 | |
CY2020 | imgn |
Non Cash Interest Expense From Sale Of Future Royalties
NonCashInterestExpenseFromSaleOfFutureRoyalties
|
23107000 | |
CY2019 | imgn |
Non Cash Interest Expense From Sale Of Future Royalties
NonCashInterestExpenseFromSaleOfFutureRoyalties
|
16879000 | |
CY2021 | us-gaap |
Depreciation Depletion And Amortization
DepreciationDepletionAndAmortization
|
2017000 | |
CY2020 | us-gaap |
Depreciation Depletion And Amortization
DepreciationDepletionAndAmortization
|
2101000 | |
CY2019 | us-gaap |
Depreciation Depletion And Amortization
DepreciationDepletionAndAmortization
|
4028000 | |
CY2020 | us-gaap |
Gain Loss On Sale Of Property Plant Equipment
GainLossOnSaleOfPropertyPlantEquipment
|
691000 | |
CY2019 | us-gaap |
Gain Loss On Sale Of Property Plant Equipment
GainLossOnSaleOfPropertyPlantEquipment
|
-1689000 | |
CY2019 | us-gaap |
Operating Lease Impairment Loss
OperatingLeaseImpairmentLoss
|
694000 | |
CY2021 | us-gaap |
Share Based Compensation
ShareBasedCompensation
|
17475000 | |
CY2020 | us-gaap |
Share Based Compensation
ShareBasedCompensation
|
14321000 | |
CY2019 | us-gaap |
Share Based Compensation
ShareBasedCompensation
|
14167000 | |
CY2021 | us-gaap |
Increase Decrease In Accounts Receivable
IncreaseDecreaseInAccountsReceivable
|
4432000 | |
CY2020 | us-gaap |
Increase Decrease In Accounts Receivable
IncreaseDecreaseInAccountsReceivable
|
-7465000 | |
CY2019 | us-gaap |
Increase Decrease In Accounts Receivable
IncreaseDecreaseInAccountsReceivable
|
5799000 | |
CY2021 | imgn |
Increase Decrease In Customer Asset
IncreaseDecreaseInCustomerAsset
|
2334000 | |
CY2020 | imgn |
Increase Decrease In Customer Asset
IncreaseDecreaseInCustomerAsset
|
-990000 | |
CY2019 | imgn |
Increase Decrease In Customer Asset
IncreaseDecreaseInCustomerAsset
|
384000 | |
CY2021 | us-gaap |
Increase Decrease In Contract With Customer Asset
IncreaseDecreaseInContractWithCustomerAsset
|
3000000 | |
CY2020 | us-gaap |
Increase Decrease In Contract With Customer Asset
IncreaseDecreaseInContractWithCustomerAsset
|
-3631000 | |
CY2019 | us-gaap |
Increase Decrease In Contract With Customer Asset
IncreaseDecreaseInContractWithCustomerAsset
|
3131000 | |
CY2021 | us-gaap |
Increase Decrease In Prepaid Deferred Expense And Other Assets
IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets
|
-579000 | |
CY2020 | us-gaap |
Increase Decrease In Prepaid Deferred Expense And Other Assets
IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets
|
2476000 | |
CY2019 | us-gaap |
Increase Decrease In Prepaid Deferred Expense And Other Assets
IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets
|
963000 | |
CY2021 | us-gaap |
Right Of Use Asset Obtained In Exchange For Operating Lease Liability
RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability
|
1680000 | |
CY2020 | us-gaap |
Right Of Use Asset Obtained In Exchange For Operating Lease Liability
RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability
|
1515000 | |
CY2019 | us-gaap |
Right Of Use Asset Obtained In Exchange For Operating Lease Liability
RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability
|
1331000 | |
CY2021 | us-gaap |
Increase Decrease In Other Operating Assets
IncreaseDecreaseInOtherOperatingAssets
|
-2275000 | |
CY2020 | us-gaap |
Increase Decrease In Other Operating Assets
IncreaseDecreaseInOtherOperatingAssets
|
7202000 | |
CY2019 | us-gaap |
Increase Decrease In Other Operating Assets
IncreaseDecreaseInOtherOperatingAssets
|
75000 | |
CY2021 | us-gaap |
Increase Decrease In Accounts Payable
IncreaseDecreaseInAccountsPayable
|
9148000 | |
CY2020 | us-gaap |
Increase Decrease In Accounts Payable
IncreaseDecreaseInAccountsPayable
|
-819000 | |
CY2019 | us-gaap |
Increase Decrease In Accounts Payable
IncreaseDecreaseInAccountsPayable
|
-1045000 | |
CY2021 | us-gaap |
Increase Decrease In Employee Related Liabilities
IncreaseDecreaseInEmployeeRelatedLiabilities
|
849000 | |
CY2020 | us-gaap |
Increase Decrease In Employee Related Liabilities
IncreaseDecreaseInEmployeeRelatedLiabilities
|
-4100000 | |
CY2019 | us-gaap |
Increase Decrease In Employee Related Liabilities
IncreaseDecreaseInEmployeeRelatedLiabilities
|
-2189000 | |
CY2021 | us-gaap |
Increase Decrease In Other Accrued Liabilities
IncreaseDecreaseInOtherAccruedLiabilities
|
-7261000 | |
CY2020 | us-gaap |
Increase Decrease In Other Accrued Liabilities
IncreaseDecreaseInOtherAccruedLiabilities
|
16734000 | |
CY2019 | us-gaap |
Increase Decrease In Other Accrued Liabilities
IncreaseDecreaseInOtherAccruedLiabilities
|
-6146000 | |
CY2021 | us-gaap |
Increase Decrease In Contract With Customer Liability
IncreaseDecreaseInContractWithCustomerLiability
|
-18041000 | |
CY2020 | us-gaap |
Increase Decrease In Contract With Customer Liability
IncreaseDecreaseInContractWithCustomerLiability
|
-17323000 | |
CY2019 | us-gaap |
Increase Decrease In Contract With Customer Liability
IncreaseDecreaseInContractWithCustomerLiability
|
46630000 | |
CY2021 | imgn |
Operating Lease Liability Amortization
OperatingLeaseLiabilityAmortization
|
-3016000 | |
CY2020 | imgn |
Operating Lease Liability Amortization
OperatingLeaseLiabilityAmortization
|
-2972000 | |
CY2019 | imgn |
Operating Lease Liability Amortization
OperatingLeaseLiabilityAmortization
|
-2505000 | |
CY2021 | us-gaap |
Net Cash Provided By Used In Operating Activities
NetCashProvidedByUsedInOperatingActivities
|
-169416000 | |
CY2020 | us-gaap |
Net Cash Provided By Used In Operating Activities
NetCashProvidedByUsedInOperatingActivities
|
-78620000 | |
CY2019 | us-gaap |
Net Cash Provided By Used In Operating Activities
NetCashProvidedByUsedInOperatingActivities
|
-88367000 | |
CY2021 | us-gaap |
Payments To Acquire Property Plant And Equipment
PaymentsToAcquirePropertyPlantAndEquipment
|
1434000 | |
CY2020 | us-gaap |
Payments To Acquire Property Plant And Equipment
PaymentsToAcquirePropertyPlantAndEquipment
|
917000 | |
CY2019 | us-gaap |
Payments To Acquire Property Plant And Equipment
PaymentsToAcquirePropertyPlantAndEquipment
|
2845000 | |
CY2020 | us-gaap |
Proceeds From Sale Of Machinery And Equipment
ProceedsFromSaleOfMachineryAndEquipment
|
1426000 | |
CY2019 | us-gaap |
Proceeds From Sale Of Machinery And Equipment
ProceedsFromSaleOfMachineryAndEquipment
|
2312000 | |
CY2021 | us-gaap |
Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInInvestingActivities
|
-1434000 | |
CY2020 | us-gaap |
Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInInvestingActivities
|
509000 | |
CY2019 | us-gaap |
Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInInvestingActivities
|
-533000 | |
CY2021 | us-gaap |
Repayments Of Convertible Debt
RepaymentsOfConvertibleDebt
|
1100000 | |
CY2021 | us-gaap |
Proceeds From Stock Options Exercised
ProceedsFromStockOptionsExercised
|
3769000 | |
CY2020 | us-gaap |
Proceeds From Stock Options Exercised
ProceedsFromStockOptionsExercised
|
1471000 | |
CY2019 | us-gaap |
Proceeds From Stock Options Exercised
ProceedsFromStockOptionsExercised
|
2873000 | |
CY2021 | us-gaap |
Payments Of Loan Costs
PaymentsOfLoanCosts
|
391000 | |
CY2021 | us-gaap |
Proceeds From Issuance Of Warrants
ProceedsFromIssuanceOfWarrants
|
199045000 | |
CY2021 | us-gaap |
Payments Of Stock Issuance Costs
PaymentsOfStockIssuanceCosts
|
373000 | |
CY2020 | us-gaap |
Payments Of Stock Issuance Costs
PaymentsOfStockIssuanceCosts
|
701000 | |
CY2021 | us-gaap |
Proceeds From Issuance Of Common Stock
ProceedsFromIssuanceOfCommonStock
|
154030000 | |
CY2020 | us-gaap |
Proceeds From Issuance Of Common Stock
ProceedsFromIssuanceOfCommonStock
|
194271000 | |
CY2021 | us-gaap |
Net Cash Provided By Used In Financing Activities
NetCashProvidedByUsedInFinancingActivities
|
355744000 | |
CY2020 | us-gaap |
Net Cash Provided By Used In Financing Activities
NetCashProvidedByUsedInFinancingActivities
|
195742000 | |
CY2019 | us-gaap |
Net Cash Provided By Used In Financing Activities
NetCashProvidedByUsedInFinancingActivities
|
2873000 | |
CY2021 | us-gaap |
Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect
|
184894000 | |
CY2020 | us-gaap |
Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect
|
117631000 | |
CY2019 | us-gaap |
Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect
|
-86027000 | |
CY2020Q4 | us-gaap |
Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
|
293856000 | |
CY2019Q4 | us-gaap |
Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
|
176225000 | |
CY2018Q4 | us-gaap |
Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
|
262252000 | |
CY2021Q4 | us-gaap |
Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
|
478750000 | |
CY2020Q4 | us-gaap |
Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
|
293856000 | |
CY2019Q4 | us-gaap |
Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
|
176225000 | |
CY2021 | us-gaap |
Interest Paid Net
InterestPaidNet
|
47000 | |
CY2020 | us-gaap |
Interest Paid Net
InterestPaidNet
|
95000 | |
CY2019 | us-gaap |
Interest Paid Net
InterestPaidNet
|
95000 | |
CY2021 | us-gaap |
Profit Loss
ProfitLoss
|
-139300000 | |
CY2021Q4 | us-gaap |
Retained Earnings Accumulated Deficit
RetainedEarningsAccumulatedDeficit
|
-1500000000 | |
CY2021Q4 | us-gaap |
Cash And Cash Equivalents At Carrying Value
CashAndCashEquivalentsAtCarryingValue
|
478800000 | |
CY2021 | imgn |
Current Capital Resources To Meet Operational Expenses And Capital Expenditures Expected Period
CurrentCapitalResourcesToMeetOperationalExpensesAndCapitalExpendituresExpectedPeriod
|
P12M | |
CY2021 | us-gaap |
Use Of Estimates
UseOfEstimates
|
<p style="font-family:'Times New Roman','Times','serif';font-size:10pt;padding-left:18pt;text-indent:-18pt;margin:0pt 0pt 6pt 36pt;"><i style="font-style:italic;">Use of Estimates</i></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;text-indent:36pt;margin:0pt 0pt 6pt 0pt;">The preparation of financial statements in conformity with accounting principles generally accepted in the United States (U.S.) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.</p> | |
CY2021Q4 | us-gaap |
Revenue Remaining Performance Obligation
RevenueRemainingPerformanceObligation
|
92100000 | |
CY2021Q4 | us-gaap |
Revenue Remaining Performance Obligation Percentage
RevenueRemainingPerformanceObligationPercentage
|
0.48 | |
CY2021Q4 | us-gaap |
Revenue Remaining Performance Obligation Percentage
RevenueRemainingPerformanceObligationPercentage
|
0.41 | |
CY2021Q4 | us-gaap |
Revenue Remaining Performance Obligation Percentage
RevenueRemainingPerformanceObligationPercentage
|
0.11 | |
CY2021 | us-gaap |
Contract With Customer Asset Increase Decrease For Contract Acquired In Business Combination
ContractWithCustomerAssetIncreaseDecreaseForContractAcquiredInBusinessCombination
|
-5500000 | |
CY2021 | us-gaap |
Contract With Customer Asset Reclassified To Receivable
ContractWithCustomerAssetReclassifiedToReceivable
|
-2500000 | |
CY2021Q4 | us-gaap |
Contract With Customer Asset Gross Current
ContractWithCustomerAssetGrossCurrent
|
3000000 | |
CY2020Q4 | us-gaap |
Contract With Customer Liability
ContractWithCustomerLiability
|
110109000 | |
CY2021 | us-gaap |
Contract With Customer Liability Increase Decrease For Contract Acquired In Business Combination
ContractWithCustomerLiabilityIncreaseDecreaseForContractAcquiredInBusinessCombination
|
4753000 | |
CY2021 | us-gaap |
Contract With Customer Liability Change In Timeframe Performance Obligation Satisfied Revenue Recognized
ContractWithCustomerLiabilityChangeInTimeframePerformanceObligationSatisfiedRevenueRecognized
|
22794000 | |
CY2021Q4 | us-gaap |
Contract With Customer Liability
ContractWithCustomerLiability
|
92068000 | |
CY2019Q4 | us-gaap |
Contract With Customer Asset Gross Current
ContractWithCustomerAssetGrossCurrent
|
3631000 | |
CY2020 | us-gaap |
Contract With Customer Asset Reclassified To Receivable
ContractWithCustomerAssetReclassifiedToReceivable
|
-8000000 | |
CY2020Q4 | imgn |
Contract Asset Impact Of Netting
ContractAssetImpactOfNetting
|
4369000 | |
CY2019Q4 | us-gaap |
Contract With Customer Liability
ContractWithCustomerLiability
|
127432000 | |
CY2020 | us-gaap |
Contract With Customer Liability Increase Decrease For Contract Acquired In Business Combination
ContractWithCustomerLiabilityIncreaseDecreaseForContractAcquiredInBusinessCombination
|
42050000 | |
CY2020 | us-gaap |
Contract With Customer Liability Change In Timeframe Performance Obligation Satisfied Revenue Recognized
ContractWithCustomerLiabilityChangeInTimeframePerformanceObligationSatisfiedRevenueRecognized
|
63742000 | |
CY2020Q4 | imgn |
Contract Liabilities Impact Of Netting
ContractLiabilitiesImpactOfNetting
|
4369000 | |
CY2020Q4 | us-gaap |
Contract With Customer Liability
ContractWithCustomerLiability
|
110109000 | |
CY2021 | us-gaap |
Contract With Customer Liability Revenue Recognized
ContractWithCustomerLiabilityRevenueRecognized
|
22765000 | |
CY2020 | us-gaap |
Contract With Customer Liability Revenue Recognized
ContractWithCustomerLiabilityRevenueRecognized
|
61872000 | |
CY2019 | us-gaap |
Contract With Customer Liability Revenue Recognized
ContractWithCustomerLiabilityRevenueRecognized
|
14817000 | |
CY2021 | us-gaap |
Contract With Customer Performance Obligation Satisfied In Previous Period
ContractWithCustomerPerformanceObligationSatisfiedInPreviousPeriod
|
5500000 | |
CY2019 | us-gaap |
Contract With Customer Performance Obligation Satisfied In Previous Period
ContractWithCustomerPerformanceObligationSatisfiedInPreviousPeriod
|
12672000 | |
CY2020Q4 | us-gaap |
Cash And Cash Equivalents At Carrying Value
CashAndCashEquivalentsAtCarryingValue
|
293900000 | |
CY2021 | us-gaap |
Capital Expenditures Incurred But Not Yet Paid
CapitalExpendituresIncurredButNotYetPaid
|
200000 | |
CY2020 | us-gaap |
Capital Expenditures Incurred But Not Yet Paid
CapitalExpendituresIncurredButNotYetPaid
|
700000 | |
CY2021 | imgn |
Cash And Cash Equivalents Number Of Financial Institutions
CashAndCashEquivalentsNumberOfFinancialInstitutions
|
3 | |
CY2020Q4 | us-gaap |
Marketable Securities
MarketableSecurities
|
0 | |
CY2021Q4 | us-gaap |
Marketable Securities
MarketableSecurities
|
0 | |
CY2021Q4 | us-gaap |
Cash And Cash Equivalents At Carrying Value
CashAndCashEquivalentsAtCarryingValue
|
478800000 | |
CY2021 | imgn |
Number Of Trades Impacting Fair Value Of Financial Instruments
NumberOfTradesImpactingFairValueOfFinancialInstruments
|
0 | |
CY2021Q4 | us-gaap |
Common Stock Par Or Stated Value Per Share
CommonStockParOrStatedValuePerShare
|
0.01 | |
CY2021Q3 | us-gaap |
Repayments Of Convertible Debt
RepaymentsOfConvertibleDebt
|
1100000 | |
CY2021Q4 | us-gaap |
Finance Lease Liability
FinanceLeaseLiability
|
0 | |
CY2021Q4 | imgn |
Accrued Contract Payments Current
AccruedContractPaymentsCurrent
|
5558000 | |
CY2020Q4 | imgn |
Accrued Contract Payments Current
AccruedContractPaymentsCurrent
|
15576000 | |
CY2021Q4 | imgn |
Accrued Clinical Trial Costs Current
AccruedClinicalTrialCostsCurrent
|
15556000 | |
CY2020Q4 | imgn |
Accrued Clinical Trial Costs Current
AccruedClinicalTrialCostsCurrent
|
11401000 | |
CY2021Q4 | us-gaap |
Accrued Professional Fees Current
AccruedProfessionalFeesCurrent
|
839000 | |
CY2020Q4 | us-gaap |
Accrued Professional Fees Current
AccruedProfessionalFeesCurrent
|
1200000 | |
CY2021Q4 | us-gaap |
Accrued Employee Benefits Current
AccruedEmployeeBenefitsCurrent
|
40000 | |
CY2020Q4 | us-gaap |
Accrued Employee Benefits Current
AccruedEmployeeBenefitsCurrent
|
39000 | |
CY2021Q4 | imgn |
Accrued Public Reporting Charges Current
AccruedPublicReportingChargesCurrent
|
309000 | |
CY2020Q4 | imgn |
Accrued Public Reporting Charges Current
AccruedPublicReportingChargesCurrent
|
319000 | |
CY2021Q4 | imgn |
Other Current Accrued Liabilities
OtherCurrentAccruedLiabilities
|
775000 | |
CY2020Q4 | imgn |
Other Current Accrued Liabilities
OtherCurrentAccruedLiabilities
|
785000 | |
CY2021Q4 | us-gaap |
Other Accrued Liabilities Current
OtherAccruedLiabilitiesCurrent
|
23077000 | |
CY2020Q4 | us-gaap |
Other Accrued Liabilities Current
OtherAccruedLiabilitiesCurrent
|
29320000 | |
CY2019 | us-gaap |
Asset Impairment Charges
AssetImpairmentCharges
|
2500000 | |
CY2020 | us-gaap |
Asset Impairment Charges
AssetImpairmentCharges
|
0 | |
CY2021 | us-gaap |
Asset Impairment Charges
AssetImpairmentCharges
|
0 | |
CY2021 | imgn |
Share Based Compensation Arrangement By Share Based Payment Award Awards Outstanding Number
ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardsOutstandingNumber
|
21296000 | |
CY2020 | imgn |
Share Based Compensation Arrangement By Share Based Payment Award Awards Outstanding Number
ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardsOutstandingNumber
|
18459000 | |
CY2019 | imgn |
Share Based Compensation Arrangement By Share Based Payment Award Awards Outstanding Number
ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardsOutstandingNumber
|
14815000 | |
CY2021 | us-gaap |
Incremental Common Shares Attributable To Share Based Payment Arrangements
IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
|
2546000 | |
CY2020 | us-gaap |
Incremental Common Shares Attributable To Share Based Payment Arrangements
IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
|
1301000 | |
CY2019 | us-gaap |
Incremental Common Shares Attributable To Share Based Payment Arrangements
IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
|
1020000 | |
CY2020 | us-gaap |
Debt Instrument Convertible Number Of Equity Instruments
DebtInstrumentConvertibleNumberOfEquityInstruments
|
501000 | |
CY2019 | us-gaap |
Debt Instrument Convertible Number Of Equity Instruments
DebtInstrumentConvertibleNumberOfEquityInstruments
|
501000 | |
CY2020 | us-gaap |
Incremental Common Shares Attributable To Conversion Of Debt Securities
IncrementalCommonSharesAttributableToConversionOfDebtSecurities
|
501000 | |
CY2019 | us-gaap |
Incremental Common Shares Attributable To Conversion Of Debt Securities
IncrementalCommonSharesAttributableToConversionOfDebtSecurities
|
501000 | |
CY2021 | imgn |
Share Based Compensation Arrangement By Share Based Payment Award Number Of Plans
ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfPlans
|
3 | |
CY2021 | us-gaap |
Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested In Period Fair Value1
SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1
|
15839000 | |
CY2020 | us-gaap |
Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested In Period Fair Value1
SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1
|
11465000 | |
CY2019 | us-gaap |
Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested In Period Fair Value1
SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1
|
13747000 | |
CY2021 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue
|
3322000 | |
CY2020 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue
|
746000 | |
CY2019 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue
|
556000 | |
CY2021 | us-gaap |
Proceeds From Stock Options Exercised
ProceedsFromStockOptionsExercised
|
3769000 | |
CY2020 | us-gaap |
Proceeds From Stock Options Exercised
ProceedsFromStockOptionsExercised
|
1471000 | |
CY2019 | us-gaap |
Proceeds From Stock Options Exercised
ProceedsFromStockOptionsExercised
|
2873000 | |
CY2021 | us-gaap |
Number Of Operating Segments
NumberOfOperatingSegments
|
1 | |
CY2021Q4 | us-gaap |
Property Plant And Equipment Gross
PropertyPlantAndEquipmentGross
|
34350000 | |
CY2020Q4 | us-gaap |
Property Plant And Equipment Gross
PropertyPlantAndEquipmentGross
|
33523000 | |
CY2021Q4 | us-gaap |
Accumulated Depreciation Depletion And Amortization Property Plant And Equipment
AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
|
29687000 | |
CY2020Q4 | us-gaap |
Accumulated Depreciation Depletion And Amortization Property Plant And Equipment
AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
|
27763000 | |
CY2021Q4 | us-gaap |
Property Plant And Equipment Net
PropertyPlantAndEquipmentNet
|
4663000 | |
CY2020Q4 | us-gaap |
Property Plant And Equipment Net
PropertyPlantAndEquipmentNet
|
5760000 | |
CY2021 | us-gaap |
Depreciation Depletion And Amortization
DepreciationDepletionAndAmortization
|
2000000.0 | |
CY2020 | us-gaap |
Depreciation Depletion And Amortization
DepreciationDepletionAndAmortization
|
2100000 | |
CY2019 | us-gaap |
Depreciation Depletion And Amortization
DepreciationDepletionAndAmortization
|
4000000.0 | |
CY2019Q2 | us-gaap |
Impairment Of Long Lived Assets To Be Disposed Of
ImpairmentOfLongLivedAssetsToBeDisposedOf
|
2500000 | |
CY2019Q4 | imgn |
Cost Basis To Liquidate Property And Equipment
CostBasisToLiquidatePropertyAndEquipment
|
14200000 | |
CY2019Q4 | imgn |
Accumulated Depreciation Impairment Liquidate Equipment
AccumulatedDepreciationImpairmentLiquidateEquipment
|
12900000 | |
CY2019Q4 | imgn |
Equipment Liquidate Amount
EquipmentLiquidateAmount
|
2000000 | |
CY2020 | imgn |
Cost Basis To Liquidate Property And Equipment
CostBasisToLiquidatePropertyAndEquipment
|
6700000 | |
CY2020 | us-gaap |
Proceeds From Sale Of Property Plant And Equipment
ProceedsFromSaleOfPropertyPlantAndEquipment
|
1200000 | |
CY2021 | us-gaap |
Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest
IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
|
-139303000 | |
CY2020 | us-gaap |
Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest
IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
|
-44372000 | |
CY2019 | us-gaap |
Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest
IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
|
-104133000 | |
CY2021 | us-gaap |
Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate
EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
|
0.21 | |
CY2021 | us-gaap |
Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate
IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate
|
-29254000 | |
CY2020 | us-gaap |
Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate
IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate
|
-9318000 | |
CY2019 | us-gaap |
Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate
IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate
|
-21868000 | |
CY2021 | us-gaap |
Income Tax Reconciliation Nondeductible Expense
IncomeTaxReconciliationNondeductibleExpense
|
606000 | |
CY2020 | us-gaap |
Income Tax Reconciliation Nondeductible Expense
IncomeTaxReconciliationNondeductibleExpense
|
157000 | |
CY2019 | us-gaap |
Income Tax Reconciliation Nondeductible Expense
IncomeTaxReconciliationNondeductibleExpense
|
320000 | |
CY2021 | us-gaap |
Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost
IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost
|
420000 | |
CY2019 | us-gaap |
Income Tax Reconciliation Tax Credits Research
IncomeTaxReconciliationTaxCreditsResearch
|
1652000 | |
CY2021 | imgn |
Income Tax Reconciliation Federal Orphan Drug Credit
IncomeTaxReconciliationFederalOrphanDrugCredit
|
7429000 | |
CY2020 | imgn |
Income Tax Reconciliation Federal Orphan Drug Credit
IncomeTaxReconciliationFederalOrphanDrugCredit
|
6218000 | |
CY2019 | imgn |
Income Tax Reconciliation Federal Orphan Drug Credit
IncomeTaxReconciliationFederalOrphanDrugCredit
|
4426000 | |
CY2021 | imgn |
Income Tax Reconciliation Expired Carryforward
IncomeTaxReconciliationExpiredCarryforward
|
345000 | |
CY2020 | imgn |
Income Tax Reconciliation Expired Carryforward
IncomeTaxReconciliationExpiredCarryforward
|
419000 | |
CY2019 | imgn |
Income Tax Reconciliation Expired Carryforward
IncomeTaxReconciliationExpiredCarryforward
|
500000 | |
CY2021Q4 | us-gaap |
Deferred Tax Assets Tax Credit Carryforwards Research
DeferredTaxAssetsTaxCreditCarryforwardsResearch
|
92832000 | |
CY2020Q4 | us-gaap |
Deferred Tax Assets Tax Credit Carryforwards Research
DeferredTaxAssetsTaxCreditCarryforwardsResearch
|
80694000 | |
CY2021 | imgn |
Effective Income Tax Rate Reconciliation Tax Credit Lease Incentive Amount
EffectiveIncomeTaxRateReconciliationTaxCreditLeaseIncentiveAmount
|
-4789000 | |
CY2021Q4 | imgn |
Deferred Tax Assets Property And Other Intangible Assets
DeferredTaxAssetsPropertyAndOtherIntangibleAssets
|
1150000 | |
CY2020Q4 | imgn |
Deferred Tax Assets Property And Other Intangible Assets
DeferredTaxAssetsPropertyAndOtherIntangibleAssets
|
871000 | |
CY2020 | us-gaap |
Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost
IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost
|
201000 | |
CY2019 | us-gaap |
Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost
IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost
|
569000 | |
CY2021 | us-gaap |
Income Tax Reconciliation State And Local Income Taxes
IncomeTaxReconciliationStateAndLocalIncomeTaxes
|
-7376000 | |
CY2020 | us-gaap |
Income Tax Reconciliation State And Local Income Taxes
IncomeTaxReconciliationStateAndLocalIncomeTaxes
|
-2250000 | |
CY2019 | us-gaap |
Income Tax Reconciliation State And Local Income Taxes
IncomeTaxReconciliationStateAndLocalIncomeTaxes
|
-6726000 | |
CY2021 | us-gaap |
Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance
IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance
|
46987000 | |
CY2020 | us-gaap |
Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance
IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance
|
15175000 | |
CY2019 | us-gaap |
Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance
IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance
|
27812000 | |
CY2021 | us-gaap |
Income Tax Reconciliation Tax Credits Research
IncomeTaxReconciliationTaxCreditsResearch
|
575000 | |
CY2020 | us-gaap |
Income Tax Reconciliation Tax Credits Research
IncomeTaxReconciliationTaxCreditsResearch
|
228000 | |
CY2021 | imgn |
Effective Income Tax Rate Reconciliation Stock Option Expiration Amount
EffectiveIncomeTaxRateReconciliationStockOptionExpirationAmount
|
1065000 | |
CY2020 | imgn |
Effective Income Tax Rate Reconciliation Stock Option Expiration Amount
EffectiveIncomeTaxRateReconciliationStockOptionExpirationAmount
|
2062000 | |
CY2019 | imgn |
Effective Income Tax Rate Reconciliation Stock Option Expiration Amount
EffectiveIncomeTaxRateReconciliationStockOptionExpirationAmount
|
5471000 | |
CY2021 | us-gaap |
Income Tax Expense Benefit
IncomeTaxExpenseBenefit
|
0 | |
CY2020 | us-gaap |
Income Tax Expense Benefit
IncomeTaxExpenseBenefit
|
0 | |
CY2019 | us-gaap |
Income Tax Expense Benefit
IncomeTaxExpenseBenefit
|
0 | |
CY2021Q4 | us-gaap |
Deferred Tax Assets Operating Loss Carryforwards
DeferredTaxAssetsOperatingLossCarryforwards
|
264773000 | |
CY2020Q4 | us-gaap |
Deferred Tax Assets Operating Loss Carryforwards
DeferredTaxAssetsOperatingLossCarryforwards
|
220286000 | |
CY2021Q4 | us-gaap |
Deferred Tax Assets Deferred Income
DeferredTaxAssetsDeferredIncome
|
25153000 | |
CY2020Q4 | us-gaap |
Deferred Tax Assets Deferred Income
DeferredTaxAssetsDeferredIncome
|
30082000 | |
CY2021Q4 | us-gaap |
Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost
DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost
|
12286000 | |
CY2020Q4 | us-gaap |
Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost
DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost
|
9940000 | |
CY2021Q4 | imgn |
Deferred Tax Assets Operating Lease Liability
DeferredTaxAssetsOperatingLeaseLiability
|
5170000 | |
CY2020Q4 | imgn |
Deferred Tax Assets Operating Lease Liability
DeferredTaxAssetsOperatingLeaseLiability
|
6033000 | |
CY2021Q4 | us-gaap |
Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Other
DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther
|
1737000 | |
CY2020Q4 | us-gaap |
Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Other
DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther
|
1514000 | |
CY2021Q4 | imgn |
Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Royalty Sale
DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsRoyaltySale
|
10247000 | |
CY2020Q4 | imgn |
Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Royalty Sale
DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsRoyaltySale
|
17455000 | |
CY2021Q4 | us-gaap |
Deferred Tax Assets Gross
DeferredTaxAssetsGross
|
413348000 | |
CY2020Q4 | us-gaap |
Deferred Tax Assets Gross
DeferredTaxAssetsGross
|
366875000 | |
CY2021Q4 | imgn |
Deferred Tax Liabilities Share Based Compensation
DeferredTaxLiabilitiesShareBasedCompensation
|
91000 | |
CY2020Q4 | imgn |
Deferred Tax Liabilities Share Based Compensation
DeferredTaxLiabilitiesShareBasedCompensation
|
58000 | |
CY2021Q4 | imgn |
Deferred Tax Liabilities Operating Lease Right Of Use Asset
DeferredTaxLiabilitiesOperatingLeaseRightOfUseAsset
|
3386000 | |
CY2020Q4 | imgn |
Deferred Tax Liabilities Operating Lease Right Of Use Asset
DeferredTaxLiabilitiesOperatingLeaseRightOfUseAsset
|
3844000 | |
CY2021Q4 | imgn |
Deferred Tax Liabilities Royalty Sale
DeferredTaxLiabilitiesRoyaltySale
|
158000 | |
CY2021Q3 | us-gaap |
Class Of Warrant Or Right Exercise Price Of Warrants Or Rights1
ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
|
0.01 | |
CY2021Q4 | us-gaap |
Class Of Warrant Or Right Exercise Price Of Warrants Or Rights1
ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
|
0.01 | |
CY2021Q4 | us-gaap |
Shares Issued Price Per Share
SharesIssuedPricePerShare
|
6.60 | |
CY2021 | us-gaap |
Lessee Operating Lease Existence Of Option To Extend
LesseeOperatingLeaseExistenceOfOptionToExtend
|
true | |
CY2019Q1 | imgn |
Unamortized Lease Incentive And Straight Line Lease Liability Balances
UnamortizedLeaseIncentiveAndStraightLineLeaseLiabilityBalances
|
9700000 | |
CY2021Q4 | us-gaap |
Operating Lease Weighted Average Discount Rate Percent
OperatingLeaseWeightedAverageDiscountRatePercent
|
0.11 | |
CY2021 | imgn |
Aggregate Adjustment To Right Of Use Asset
AggregateAdjustmentToRightOfUseAsset
|
1000000 | |
CY2021 | us-gaap |
Operating Lease Expense
OperatingLeaseExpense
|
4000000.0 | |
CY2020Q4 | imgn |
Deferred Tax Liabilities Royalty Sale
DeferredTaxLiabilitiesRoyaltySale
|
247000 | |
CY2021Q4 | us-gaap |
Deferred Income Tax Liabilities
DeferredIncomeTaxLiabilities
|
3635000 | |
CY2020Q4 | us-gaap |
Deferred Income Tax Liabilities
DeferredIncomeTaxLiabilities
|
4149000 | |
CY2021Q4 | us-gaap |
Deferred Tax Assets Valuation Allowance
DeferredTaxAssetsValuationAllowance
|
409713000 | |
CY2020Q4 | us-gaap |
Deferred Tax Assets Valuation Allowance
DeferredTaxAssetsValuationAllowance
|
362726000 | |
CY2021 | us-gaap |
Valuation Allowance Deferred Tax Asset Change In Amount
ValuationAllowanceDeferredTaxAssetChangeInAmount
|
47000000.0 | |
CY2015 | imgn |
Ownership Control Increase Decrease Under Section382 Percentage
OwnershipControlIncreaseDecreaseUnderSection382Percentage
|
0 | |
CY2020 | us-gaap |
Tax Adjustments Settlements And Unusual Provisions
TaxAdjustmentsSettlementsAndUnusualProvisions
|
0 | |
CY2021 | us-gaap |
Tax Adjustments Settlements And Unusual Provisions
TaxAdjustmentsSettlementsAndUnusualProvisions
|
0 | |
CY2021Q4 | us-gaap |
Common Stock Capital Shares Reserved For Future Issuance
CommonStockCapitalSharesReservedForFutureIssuance
|
33600000 | |
CY2021 | imgn |
Number Of Real Estate Leases
NumberOfRealEstateLeases
|
1 | |
CY2020 | us-gaap |
Operating Lease Expense
OperatingLeaseExpense
|
4000000.0 | |
CY2019 | us-gaap |
Operating Lease Expense
OperatingLeaseExpense
|
4300000 | |
CY2021 | us-gaap |
Operating Lease Payments
OperatingLeasePayments
|
5300000 | |
CY2020 | us-gaap |
Operating Lease Payments
OperatingLeasePayments
|
5500000 | |
CY2021Q4 | us-gaap |
Operating Lease Right Of Use Asset
OperatingLeaseRightOfUseAsset
|
12400000 | |
CY2021Q4 | us-gaap |
Operating Lease Liability
OperatingLeaseLiability
|
18800000 | |
CY2021Q4 | us-gaap |
Operating Lease Weighted Average Remaining Lease Term1
OperatingLeaseWeightedAverageRemainingLeaseTerm1
|
P4Y3M | |
CY2021Q4 | us-gaap |
Lessee Operating Lease Liability Payments Due Next Twelve Months
LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths
|
5363000 | |
CY2021Q4 | us-gaap |
Lessee Operating Lease Liability Payments Due Year Two
LesseeOperatingLeaseLiabilityPaymentsDueYearTwo
|
5503000 | |
CY2021Q4 | us-gaap |
Lessee Operating Lease Liability Payments Due Year Three
LesseeOperatingLeaseLiabilityPaymentsDueYearThree
|
5522000 | |
CY2021Q4 | us-gaap |
Lessee Operating Lease Liability Payments Due Year Four
LesseeOperatingLeaseLiabilityPaymentsDueYearFour
|
5543000 | |
CY2021Q4 | us-gaap |
Lessee Operating Lease Liability Payments Due Year Five
LesseeOperatingLeaseLiabilityPaymentsDueYearFive
|
1429000 | |
CY2021Q4 | us-gaap |
Lessee Operating Lease Liability Payments Due After Year Five
LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive
|
13000 | |
CY2021Q4 | us-gaap |
Lessee Operating Lease Liability Payments Due
LesseeOperatingLeaseLiabilityPaymentsDue
|
23373000 | |
CY2021Q4 | us-gaap |
Lessee Operating Lease Liability Undiscounted Excess Amount
LesseeOperatingLeaseLiabilityUndiscountedExcessAmount
|
4592000 | |
CY2021Q4 | us-gaap |
Operating Lease Liability
OperatingLeaseLiability
|
18781000 | |
CY2021 | us-gaap |
Variable Lease Cost
VariableLeaseCost
|
3400000 | |
CY2021 | us-gaap |
Sublease Income
SubleaseIncome
|
4900000 | |
CY2020 | us-gaap |
Sublease Income
SubleaseIncome
|
2800000 | |
CY2021 | imgn |
Defined Contribution Plan Employee Contribution Limit Percentage Of Salary
DefinedContributionPlanEmployeeContributionLimitPercentageOfSalary
|
1 | |
CY2021 | us-gaap |
Defined Contribution Plan Employer Matching Contribution Percent
DefinedContributionPlanEmployerMatchingContributionPercent
|
0.50 | |
CY2021 | us-gaap |
Defined Contribution Plan Maximum Annual Contributions Per Employee Percent
DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent
|
0.06 | |
CY2021 | us-gaap |
Defined Contribution Plan Cost Recognized
DefinedContributionPlanCostRecognized
|
500000 | |
CY2020 | us-gaap |
Defined Contribution Plan Cost Recognized
DefinedContributionPlanCostRecognized
|
400000 | |
CY2019 | us-gaap |
Defined Contribution Plan Cost Recognized
DefinedContributionPlanCostRecognized
|
800000 |