v3.26.1
Cover - shares
 3 Months Ended
Mar. 31, 2026
May 06, 2026
Document Information [Line Items]    
Document Type 10-Q  
Amendment Flag false  
Document Transition Report false  
Document Period End Date Mar. 31, 2026  
Document Fiscal Period Focus Q1  
Document Fiscal Year Focus 2026  
Current Fiscal Year End Date --12-31  
Document Quarterly Report true  
Entity File Number 001-39871  
Entity Registrant Name SAB BIOTHERAPEUTICS, INC.  
Entity Central Index Key 0001833214  
Entity Tax Identification Number 85-3899721  
Entity Incorporation, State or Country Code DE  
Entity Address, Address Line One 777 W 41st St  
Entity Address, Address Line Two Suite 401  
Entity Address, City or Town Miami Beach  
Entity Address, State or Province FL  
Entity Address, Postal Zip Code 33140  
City Area Code 605  
Local Phone Number 679-6980  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company true  
Elected Not To Use the Extended Transition Period false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   76,464,094
Common Stock [Member]    
Document Information [Line Items]    
Title of 12(b) Security Common stock, $0.0001 par value per share  
Trading Symbol SABS  
Security Exchange Name NASDAQ  
Warrants Each Exercisable for Common Stock [Member]    
Document Information [Line Items]    
Title of 12(b) Security Warrants, each exercisable for one share of Common Stock  
Trading Symbol SABSW  
Security Exchange Name NASDAQ