v3.22.2.2
Document and Entity Information
Oct. 02, 2022
Entity Listings [Line Items]  
Document Type 8-K
Amendment Flag false
Document Period End Date Oct. 02, 2022
Entity File Number 001-39486
Entity Registrant Name QUANTUM-SI INCORPORATED
Entity Central Index Key 0001816431
Entity Incorporation, State or Country Code DE
Entity Tax Identification Number 85-1388175
Entity Address, Address Line One 530 Old Whitfield Street
Entity Address, City or Town Guilford
Entity Address, State or Province CT
Entity Address, Postal Zip Code 06437
City Area Code 203
Local Phone Number 458-7100
Entity Emerging Growth Company false
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Common Class A [Member]  
Entity Listings [Line Items]  
Title of 12(b) Security Class A common stock, par value $0.0001 per share
Trading Symbol QSI
Security Exchange Name NASDAQ
Redeemable warrants, each whole warrant exercisable for one share of Class A common stock, each at an exercise price of $11.50 per share [Member]  
Entity Listings [Line Items]  
Title of 12(b) Security Redeemable warrants, each whole warrant exercisable for one share of Class A common stock, each at an exercise price of $11.50 per share
Trading Symbol QSIAW
Security Exchange Name NASDAQ