Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Revenue
Collaboration and license revenue	$ 3,363	$ 2,412	$ 10,440	$ 7,287
Revenue from Contract with Customer, Products and Services [Extensible List]	http://www.tscan.com/#CollaborationAndLicenseRevenueMember	http://www.tscan.com/#CollaborationAndLicenseRevenueMember	http://www.tscan.com/#CollaborationAndLicenseRevenueMember	http://www.tscan.com/#CollaborationAndLicenseRevenueMember
Operating expenses:
Research and development	$ 15,031	$ 14,206	$ 44,215	$ 32,346
General and administrative	4,910	4,048	14,212	9,380
Total operating expenses	19,941	18,254	58,427	41,726
Loss from operations	(16,578)	(15,842)	(47,987)	(34,439)
Other income:
Interest and other income, net	534	3	690	14
Interest expense	(201)		(201)
Net loss	(16,245)	(15,839)	(47,498)	(34,425)
Net loss attributable to common stockholders	$ (16,245)	$ (15,839)	$ (47,498)	$ (34,425)
Net loss per share, basic	$ (0.67)	$ (0.80)	$ (1.98)	$ (4.55)
Net loss per share, diluted	$ (0.67)	$ (0.80)	$ (1.98)	$ (4.55)
Weighted average common shares outstanding-basic	24,073,935	19,875,428	24,038,257	7,562,436
Weighted average common shares outstanding-diluted	24,073,935	19,875,428	24,038,257	7,562,436