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v3.23.1

Lease - Additional Information (Detail) - USD ($) | 1 Months Ended | 3 Months Ended
--- | --- | ---
Mar. 31, 2022 | Mar. 31, 2023 | Mar. 31, 2022
Lessee Lease Description [Line Items] |  |  |
Lease expiration date |  | Apr. 30, 2023 |
Lessee operating lease renewal term description |  | no stated renewal options |
Operating lease expense |  | $ 100,000 | $ 500,000
Sublease Arrangement |  |  |
Lessee Lease Description [Line Items] |  |  |
Lease commencement month and year | 2022-04 |  |
Lease expiration month and year | 2023-04 |  |
Lease payments receivable | $ 200,000 |  | 200,000
Sublease Income |  | $ 38,000 | $ 0

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- Definition Lease commencement month and year. + References No definition available. + Details
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Namespace Prefix: | cbio_
Data Type: | xbrli:gYearMonthItemType
Balance Type: | na
Period Type: | duration

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- Definition Lease expiration month and year. + References No definition available. + Details
Name: | cbio_LeaseExpirationMonthAndYear
Namespace Prefix: | cbio_
Data Type: | xbrli:gYearMonthItemType
Balance Type: | na
Period Type: | duration

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- Definition Lessee operating lease renewal term description. + References No definition available. + Details
Name: | cbio_LesseeOperatingLeaseRenewalTermDescription
Namespace Prefix: | cbio_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Date which lease or group of leases is set to expire, in YYYY-MM-DD format. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

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- 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
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount of lease payments to be received by lessor for operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 30 -Section 50 -Paragraph 12 -URI https://asc.fasb.org/extlink&oid=124258985&loc=SL77919396-209981 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Amount of operating lease expense. Excludes sublease income. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 4 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=123391704&loc=SL77918638-209977 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of sublease income excluding finance and operating lease expense. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (e) -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918686-209980 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 55 -Paragraph 53 -URI https://asc.fasb.org/extlink&oid=123414884&loc=SL77918982-209971 + Details
Name: | us-gaap_SubleaseIncome
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |