XML 86 R62.htm IDEA: XBRL DOCUMENT
v3.24.1.u1

Agreements with Horizon - Additional Information (Detail) - Horizon collaboration agreement [Member] - USD ($) $ in Millions |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | ---
Aug. 12, 2022 | Oct. 31, 2023 | Dec. 31, 2023 | Dec. 31, 2022
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |
Collaboration agreement, transaction price | $ 55.0 |  | $ 55.0 | $ 55.0
Collaboration agreement, Aggregate amount of sales milestone |  | $ 75.1 |  |
Transaction price to be determined |  |  | 55.0 |
Received amount from Horizon |  |  |  | 32.5
Collaboration agreement revenue |  |  |  | $ 6.7
Amount retained |  |  | 55.0 |
Collaboration agreement, contingent payment |  |  | 75.1 |
Refund liability |  |  | 55.0 |
Sales-based milestone [Member] |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |
Collaboration agreement, contingent payment |  |  | 75.1 |
Collaboration agreement, contingent payment payable excess of cash received |  |  | $ 20.1 |

X
- Definition Amount of refund liability. + References No definition available. + Details
Name: | fixx_AmountOfRefundLiability
Namespace Prefix: | fixx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Collaboration agreement contingent payment. + References No definition available. + Details
Name: | fixx_CollaborationAgreementContingentPayment
Namespace Prefix: | fixx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Collaboration agreement contingent payment payable excess of cash received. + References No definition available. + Details
Name: | fixx_CollaborationAgreementContingentPaymentPayableExcessOfCashReceived
Namespace Prefix: | fixx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Collaboration agreement transaction price. + References No definition available. + Details
Name: | fixx_CollaborationAgreementTransactionPrice
Namespace Prefix: | fixx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Collaborative arrangement milestone payments. + References No definition available. + Details
Name: | fixx_CollaborativeArrangementMilestonePayments
Namespace Prefix: | fixx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Revenue used to determine transaction price. + References No definition available. + Details
Name: | fixx_RevenueUsedToDetermineTransactionPrice
Namespace Prefix: | fixx_
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
- Definition Cash received from collaborators during the current period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-25 + Details
Name: | us-gaap_ProceedsFromCollaborators
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of revenue from collaborative arrangement. Excludes revenue from contract with customer under Topic 606. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -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 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 45 -Paragraph 3 -SubTopic 10 -Topic 808 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479428/808-10-45-3 + Details
Name: | us-gaap_RevenueFromCollaborativeArrangementExcludingRevenueFromContractWithCustomer
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

X
- Details
Name: | srt_ProductOrServiceAxis=fixx_SalesBasedMilestoneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |