XML 101 R63.htm IDEA: XBRL DOCUMENT
v3.25.0.1

Significant agreements - Ionis Evaluation and Option Agreement (Details) - USD ($) $ in Thousands |  | 1 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Jul. 09, 2021 | Jan. 31, 2021 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2020
Significant agreements. |  |  |  |  |  |
Deferred revenue |  |  | $ 101,658 | $ 135,194 | $ 61,873 |
Ionis Evaluation and Option Agreement |  |  |  |  |  |
Significant agreements. |  |  |  |  |  |
Upfront cash payment | $ 3,000 | $ 3,000 |  |  |  |
Deferred revenue |  |  |  |  |  | $ 3,000

X
- Definition The amount of upfront cash payment received from collaborative arrangement. + References No definition available. + Details
Name: | bcyc_CollaborativeArrangementUpfrontCashPaymentReceived
Namespace Prefix: | bcyc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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 Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 808 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479402/808-10-50-1 + Details
Name: | us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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 -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479837/606-10-45-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-8 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479837/606-10-45-2 + Details
Name: | us-gaap_ContractWithCustomerLiability
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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