v3.26.1
Cover
Aug. 06, 2026
Entity Addresses [Line Items]  
Document Type 8-K
Document Period End Date Aug. 06, 2026
Registrant Name SpyGlass Pharma, Inc.
Entity Incorporation, State or Country Code DE
Entity File Number 001-43105
Entity Tax Identification Number 83-3044245
Entity Address, Address Line One 15326 Alton Parkway
Entity Address, City or Town Irvine
Entity Address, State or Province CA
Entity Address, Postal Zip Code 92618
City Area Code 949
Local Phone Number 284-6904
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(b) Security Common Stock, par value $0.00001 per share
Trading Symbol SGP
Security Exchange Name NASDAQ
Entity Emerging Growth Company true
Entity Ex Transition Period false
Central Index Key 0001778922
Amendment Flag false
Former Address  
Entity Addresses [Line Items]  
Entity Address, Address Line One 27061 Aliso Creek Rd
Entity Address, Address Line Two Suite 100
Entity Address, City or Town Aliso Viejo
Entity Address, State or Province CA
Entity Address, Postal Zip Code 92656