v3.25.3
Document and Entity Information - shares
 9 Months Ended
Sep. 30, 2025
Nov. 03, 2025
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Sep. 30, 2025  
Document Fiscal Year Focus 2025  
Document Fiscal Period Focus Q3  
Entity Registrant Name FISCALNOTE HOLDINGS, INC.  
Entity Central Index Key 0001823466  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Current Fiscal Year End Date --12-31  
Entity Filer Category Accelerated Filer  
Entity Shell Company false  
Entity Small Business true  
Entity Emerging Growth Company true  
Entity Ex Transition Period false  
Entity File Number 001-396972  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 88-3772307  
Entity Address, Address Line One 1201 Pennsylvania Avenue NW, 6th Floor  
Entity Address, City or Town Washington, D.C.  
Entity Address, State or Province WA  
Entity Address, Postal Zip Code 20004  
City Area Code 202  
Local Phone Number 793-5300  
Document Quarterly Report true  
Document Transition Report false  
Common Class A    
Entity Common Stock, Shares Outstanding   15,018,986
Title of 12(b) Security Class A common stock, par value $0.0001 per share  
Trading Symbol NOTE  
Security Exchange Name NYSE  
Common Class B    
Entity Common Stock, Shares Outstanding   690,909
Warrants to purchase one share of Class A common stock, each at an exercise price of $11.50 per share    
Title of 12(b) Security Warrants to purchase 0.131 shares of Class A common stock, each at an exercise price of $11.50 per warrant  
Trading Symbol NOTE.WS  
Security Exchange Name NYSE