v3.26.1
Document and Entity Information - shares
3 Months Ended
Mar. 31, 2026
May 11, 2026
Cover [Abstract]    
Entity Registrant Name Spruce Biosciences, Inc.  
Entity Central Index Key 0001683553  
Document Type 10-Q  
Document Period End Date Mar. 31, 2026  
Trading Symbol SPRB  
Amendment Flag false  
Document Fiscal Year Focus 2026  
Document Fiscal Period Focus Q1  
Current Fiscal Year End Date --12-31  
Entity Filer Category Non-accelerated Filer  
Entity Common Stock, Shares Outstanding   2,752,278
Entity Shell Company false  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Emerging Growth Company false  
Entity Small Business true  
Entity File Number 001-39594  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 81-2154263  
Entity Address, Address Line One 611 Gateway Boulevard  
Entity Address, Address Line Two Suite 740  
Entity Address, City or Town South San Francisco  
Entity Address, State or Province CA  
Entity Address, Postal Zip Code 94080  
City Area Code 415  
Local Phone Number 343-5986  
Document Quarterly Report true  
Document Transition Report false  
Title of 12(b) Security Common Stock, par value $0.0001 per share  
Security Exchange Name NASDAQ