Common Stock - Schedule of Shares of Common Stock for Future Issuance (Detail) - shares	Dec. 31, 2025	Dec. 31, 2024
Disclosure in Tabular form of Common Stock Shares Reserved for Future Issuance [Line Items]
Common stock capital shares reserved for future issuance	4,762,664	3,842,557
Shares reserved for warrants [Member]
Disclosure in Tabular form of Common Stock Shares Reserved for Future Issuance [Line Items]
Common stock capital shares reserved for future issuance	18,144	18,144
Shares reserved for stock option exercises [Member]
Disclosure in Tabular form of Common Stock Shares Reserved for Future Issuance [Line Items]
Common stock capital shares reserved for future issuance	2,186,531	1,942,920
Shares reserved for vesting of restricted stock units [Member]
Disclosure in Tabular form of Common Stock Shares Reserved for Future Issuance [Line Items]
Common stock capital shares reserved for future issuance	317,213	0
Shares reserved for future issuance under the 2024 Stock Incentive Plan
Disclosure in Tabular form of Common Stock Shares Reserved for Future Issuance [Line Items]
Common stock capital shares reserved for future issuance	1,997,963	1,760,657
Shares reserved for future issuance under the 2024 Employee Stock Purchase Plan
Disclosure in Tabular form of Common Stock Shares Reserved for Future Issuance [Line Items]
Common stock capital shares reserved for future issuance	242,813	120,836

Q32 Bio Inc. 10-K