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Document and Entity Information
May 08, 2025
Cover [Abstract]  
Amendment Flag false
Entity Central Index Key 0001274737
Document Type 8-K
Document Period End Date May 08, 2025
Entity Registrant Name EXAGEN INC.
Entity File Number 001-39049
Entity Incorporation State Country Code DE
Entity Tax Identification Number 20-0434866
Entity Address, Address Line One 1261 Liberty Way
Entity Address, City or Town Vista
Entity Address, State or Province CA
Entity Address, Postal Zip Code 92081
City Area Code (760)
Local Phone Number 560-1501
Written Communications false
Soliciting Material false
Pre Commencement Tender Offer false
Pre Commencement Issuer Tender Offer false
Security 12b Title Common Stock, par value $0.001 per share
Trading Symbol XGN
Security Exchange Name NASDAQ
Entity Emerging Growth Company false