Related Party Transactions - Additional Information (Details) - USD ($)		1 Months Ended		3 Months Ended		9 Months Ended
	Feb. 12, 2024	Nov. 30, 2024	Jun. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024	Mar. 31, 2024
Related Party Transaction [Line Items]
Due to related parties				$ 15,043,093		$ 15,043,093		$ 13,422,407
Principal balance of note				5,000,000		$ 5,000,000
Number of shares options, granted						4,174
Stock Options \| Maximum
Related Party Transaction [Line Items]
Stock option, vesting period						4 years
Stock Options \| Minimum
Related Party Transaction [Line Items]
Stock option, vesting period						3 years
Related Party
Related Party Transaction [Line Items]
Due to related parties				15,000,000		$ 15,000,000
Agenus Inc
Related Party Transaction [Line Items]
Period of license agreement						3 years
Period for breach of payment obligations						45 days
Terminate license agreement period						90 days
Related party transaction, description						The Company may terminate the New Assignment and License Agreement without cause upon 90 days’ prior written notice to Agenus. Either party may terminate if there has been a material breach which has not been cured within 90 days (or 45 days for breach of payment obligations) of receiving such notice.
Intercompany allocation included in expense				221,000	$ 294,000	$ 708,000	$ 737,000
Percentage of per share price of equity securities sold in qualified financing	80.00%
Qualified financing terms	In the event of a qualified financing event, as defined in the Note, the outstanding principal amount of the Note plus accrued and unpaid interest shall, at Agenus’ election, either be paid in full or converted into equity shares equal to the quotient obtained by dividing (i) the amount due on the date of conversion by (ii) 80% of the per share price of the equity securities sold in the qualified financing. Upon certain change in control events, the Company will pay Agenus an amount equal to (i) 1.5 times the principal then outstanding under the Note and (ii) the amount of accrued interest then outstanding immediately prior to the closing of such change of control.
Agenus Inc \| Purchase Agreement \| Convertible Promissory Note
Related Party Transaction [Line Items]
Convertible debt issued, principal amount	$ 5,000,000
Convertible debt, annual interest rate	2.00%
Convertible debt, interest rate terms	Interest shall accrue and not be payable until converted or paid in connection with the repayment in full of the principal amount of the Note. The Note provides that the Company will pay Agenus on request the principal amount outstanding, together with any unpaid interest, on or after January 1, 2026.
Convertible debt outstanding amount									$ 5,000,000
Principal balance of note				5,000,000		5,000,000
Accrued and unpaid interest balance				$ 154,000		$ 154,000
Market interest rate				15.00%		15.00%
Agenus Inc \| New Intercompany Service Agreement
Related Party Transaction [Line Items]
Percentage of service cost						10.00%
Service agreement notice period						60 days
Agenus Inc \| Individual Services
Related Party Transaction [Line Items]
Service agreement notice period						30 days
Agenus Inc \| Business Services and Occupancy Costs
Related Party Transaction [Line Items]
Percentage of service cost						105.00%
Agenus Inc \| Research Services
Related Party Transaction [Line Items]
Percentage of service cost						110.00%
Wolf, Greenfield & Sachs, P.C.
Related Party Transaction [Line Items]
Legal services fee				$ 46,000	$ 42,000	$ 198,000	$ 121,000
Dr. Buell
Related Party Transaction [Line Items]
Compensation paid			$ 150,000
Dr. Buell \| Stock Options
Related Party Transaction [Line Items]
Number of shares options, granted		300,000	37,500			6,750

MiNK Therapeutics, Inc. 10-Q