Related Party Transactions - Additional Information (Details) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	Sep. 30, 2021	Dec. 31, 2021	Dec. 31, 2020	Feb. 28, 2021
Related Party Transaction [Line Items]
Promissory note principal balance			$ 36.1
Agenus
Related Party Transaction [Line Items]
Period of license agreement	3 years
Terminate license agreement period	90 days
Period for breach of payment obligations	45 days
Related party transaction, description		The Company has the sole responsibility to develop, manufacture and commercialize products under this New Assignment and License Agreement. 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 they believe 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.
Promissory note principal balance			36.1
Initial public offering, net of offering costs, shares		5,451,958
Percentage value of common stock sold in initial public offering		80.00%
Percentage of computation of interest		8.00%
Agenus | Maximum
Related Party Transaction [Line Items]
Increasing amount of borrowing capacity				$ 50.0
Agenus | Operating Expenses
Related Party Transaction [Line Items]
Expenses from transactions with related party		$ 2.4	$ 1.3
Agenus | New Intercompany Service Agreement
Related Party Transaction [Line Items]
Percentage of service cost	105.00%
Service agreement notice period	30 days