Stockholders’ Equity - Schedule of Reserved Shares of its Common Stock for Future Issuance (Details) - shares	Sep. 30, 2025	Dec. 31, 2024
Class of Stock [Line Items]
Common stock reserved for future issuance (in shares)	41,924,136	57,287,763
Stock options issued and outstanding
Class of Stock [Line Items]
Common stock reserved for future issuance (in shares)	4,418,890	1,333,030
Restricted stock units outstanding
Class of Stock [Line Items]
Common stock reserved for future issuance (in shares)	1,107,380	56,423
Common stock shares available for future issuance under equity plans
Class of Stock [Line Items]
Common stock reserved for future issuance (in shares)	2,571,341	270,907
Common stock shares available for future issuance under the 2022 Employee Stock Purchase Plan (the “ESPP”)
Class of Stock [Line Items]
Common stock reserved for future issuance (in shares)	127,681	79,387
GeneFab Option
Class of Stock [Line Items]
Common stock reserved for future issuance (in shares)	1,963,344	1,963,344
Warrants to purchase common stock issued in connection with Series A redeemable convertible preferred stock
Class of Stock [Line Items]
Common stock reserved for future issuance (in shares)	31,735,500	31,735,500
Performance stock units outstanding
Class of Stock [Line Items]
Common stock reserved for future issuance (in shares)	0	106,806
Unvested early exercised common stock
Class of Stock [Line Items]
Common stock reserved for future issuance (in shares)	0	422
Contingent earnout common stock
Class of Stock [Line Items]
Common stock reserved for future issuance (in shares)	0	100,000
Common Stock Purchase Agreement
Class of Stock [Line Items]
Common stock reserved for future issuance (in shares)	0	484,944
Series A redeemable convertible preferred stock
Class of Stock [Line Items]
Common stock reserved for future issuance (in shares)	0	21,157,000

Senti Biosciences, Inc. 10-Q