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Basis of Presentation and Summary of Significant Accounting Policies - Summary of Useful Life of Property Plant and Equipment (Details) | Jun. 30, 2024
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Building |
Accounting Policies [Line Items] |
Estimated Useful Lives | 20 years
Furniture and fixtures |
Accounting Policies [Line Items] |
Estimated Useful Lives | 7 years
Laboratory equipment |
Accounting Policies [Line Items] |
Estimated Useful Lives | 5 years
Office and computer equipment |
Accounting Policies [Line Items] |
Estimated Useful Lives | 3 years

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- Definition Accounting policies. + References No definition available. + Details
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Namespace Prefix: | ctkb_
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Balance Type: | na
Period Type: | duration

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- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | instant

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

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

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_EquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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