Debt instrument prepayment premium rate.

No definition available.

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Namespace Prefix:	cogt_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Line of credit facility amount available for use.

+ References

No definition available.

+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

Net product revenue amount to be achieved.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ References

+ Details

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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.

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- Definition

Indicates type of variable interest rate on debt instrument.

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- Definition

Amount of the cost of borrowed funds accounted for as interest expense for debt.

+ References

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

+ References

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+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Date the credit facility terminates, in YYYY-MM-DD format.

+ References

+ Details

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- Definition

Description of the frequency of the required periodic payments of interest, principal, or both, and the amount, if set, or a description of a formula upon which payment is based.

+ References

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- Definition

Description of the frequency of periodic payments, which may be presented in a variety of ways (for example, monthly, quarterly, annually).

+ References

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- Definition

The effective interest rate during the reporting period.

+ References

+ Details

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- Details

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Debt - Additional Information (Detail) - Credit Facility [Member] - USD ($)		3 Months Ended		6 Months Ended
	Jun. 11, 2025	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Jul. 31, 2025
Debt Instrument [Line Items]
Term loan facility, principal amount	$ 400,000,000
Amount available for borrowing		$ 0		$ 0		$ 25,000,000
Credit facility maturity date	Jun. 01, 2030
Annual interest rate	4.75%
Credit facility, basis spread rate	4.15%
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) [Member]
Line of Credit Facility, Frequency of Payment and Payment Terms	The Company is obligated to make monthly interest-only payments with respect to the Credit Facility until June 1, 2028; however, if certain conditions are satisfied, then the Company may elect to defer principal payments until June 1, 2029. Thereafter, the Company shall make (i) monthly payments of interest plus (ii) consecutive equal monthly payments of principal through to the Maturity Date.
Line of Credit Facility, Frequency of Payments	monthly
Effective interest rate		12.96%		12.96%
Interest expense related to the Credit Facility		$ 300,000	$ 0	$ 300,000	$ 0
Maximum [Member]
Debt Instrument [Line Items]
Prepayment premium rate	3.00%
Minimum [Member]
Debt Instrument [Line Items]
Prepayment premium rate	1.00%
Debt Instrument Tranche One [Member]
Debt Instrument [Line Items]
Term loan facility amount available for use	$ 50,000,000
Debt Instrument Tranche Two [Member]
Debt Instrument [Line Items]
Term loan facility amount available for use	25,000,000
Debt Instrument Tranche Three [Member]
Debt Instrument [Line Items]
Term loan facility amount available for use	75,000,000
Debt Instrument Tranche Four [Member]
Debt Instrument [Line Items]
Term loan facility amount available for use	50,000,000
Net product revenue amount to be achieved to avail tranche four debt amount	85,000,000
Debt Instrument Tranche Five [Member]
Debt Instrument [Line Items]
Term loan facility amount available for use	$ 200,000,000