v3.26.1
Cover - $ / shares
3 Months Ended
Mar. 31, 2026
Aug. 14, 2026
Cover [Abstract]    
Document Type 10-Q/A  
Amendment Flag true  
Amendment Description Amendment No. 1  
Document Quarterly Report true  
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  
Entity File Number 001-40591  
Entity Registrant Name HCW Biologics Inc.  
Entity Central Index Key 0001828673  
Entity Tax Identification Number 82-5024477  
Entity Incorporation, State or Country Code DE  
Entity Address, Address Line One 2929 N  
Entity Address, Address Line Two Commerce Parkway  
Entity Address, City or Town Miramar  
Entity Address, State or Province FL  
Entity Address, Postal Zip Code 33025  
City Area Code (954)  
Local Phone Number 842-2024  
Title of 12(b) Security Common Stock, par value $0.0001 per share  
Trading Symbol HCWB  
Security Exchange Name NASDAQ  
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 true  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   1,836,324
Entity Listing, Par Value Per Share $ 0.0001