XML 69 R51.htm IDEA: XBRL DOCUMENT
v3.23.1

Collaboration and License Agreements - Astellas Pharma Inc - Additional Information (Details) $ in Thousands | Mar. 23, 2020 USD ($) Target | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
--- | --- | --- | --- | ---
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items] |  |  |  |
Deferred revenue |  | $ 301,326 | $ 284,760 | $ 318,707
Astellas Pharma Inc. |  |  |  |
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items] |  |  |  |
Deferred revenue |  | 44,500 |  |
Collaboration and License Agreement | Astellas Pharma Inc. |  |  |  |
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items] |  |  |  |
Number of targets selected | Target | 1 |  |  |
Number of additional collaboration target | Target | 3 |  |  |
Upfront payment received | $ 80,000 |  |  |
Total transaction price | 103,200 |  |  |
Research and development service fees | 23,200 |  |  |
Deferred revenue |  | 44,500 | 60,300 |
Amount due from customer |  | $ 1,000 | $ 800 |
Collaboration and License Agreement | Astellas Pharma Inc. | Additional Contingent Payments |  |  |  |
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items] |  |  |  |
Contingent milestone payments receivable | $ 900,000 |  |  |
Collaboration and License Agreement | Astellas Pharma Inc. | Maximum |  |  |  |
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items] |  |  |  |
Number of targets | Target | 4 |  |  |
Right to expand the number of additional collaboration target | Target | 5 |  |  |
Contingent milestone payments receivable | $ 1,600,000 |  |  |
Collaboration and License Agreement | Astellas Pharma Inc. | Minimum |  |  |  |
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items] |  |  |  |
Right to expand the number of additional collaboration target | Target | 3 |  |  |

X
- Definition Aggregate collaboration transaction amount. + References No definition available. + Details
Name: | ctmx_AggregateCollaborationTransactionAmount
Namespace Prefix: | ctmx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Future contingent milestone payment receivable. + References No definition available. + Details
Name: | ctmx_ContingentMilestonePaymentsReceivable
Namespace Prefix: | ctmx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Number of additional collaboration target. + References No definition available. + Details
Name: | ctmx_NumberOfAdditionalCollaborationTarget
Namespace Prefix: | ctmx_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of targets. + References No definition available. + Details
Name: | ctmx_NumberOfTargets
Namespace Prefix: | ctmx_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of targets selected. + References No definition available. + Details
Name: | ctmx_NumberOfTargetsSelected
Namespace Prefix: | ctmx_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Research and development service fees. + References No definition available. + Details
Name: | ctmx_ResearchAndDevelopmentServiceFees
Namespace Prefix: | ctmx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Right to expand the number of additional collaboration target. + References No definition available. + Details
Name: | ctmx_RightToExpandNumberOfAdditionalCollaborationTarget
Namespace Prefix: | ctmx_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130549-203045 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=126919976&loc=SL49130531-203044 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 3 -URI https://asc.fasb.org/extlink&oid=126919976&loc=SL49130533-203044 + Details
Name: | us-gaap_ContractWithCustomerAssetNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=126919976&loc=SL49130531-203044 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130549-203045 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=126919976&loc=SL49130532-203044 + Details
Name: | us-gaap_ContractWithCustomerLiability
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Cash received from collaborators during the current period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3536-108585 + Details
Name: | us-gaap_ProceedsFromCollaborators
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | srt_CounterpartyNameAxis=ctmx_AstellasPharmaIncMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TypeOfArrangementAxis=ctmx_CollaborationAndLicenseAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ContingentConsiderationByTypeAxis=ctmx_AdditionalContingentPaymentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |