XML 12 R1.htm IDEA: XBRL DOCUMENT v3.26.1
Document And Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2025
Mar. 01, 2026
Jun. 30, 2025
Document Information [Line Items]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2025    
Document Transition Report false    
Entity File Number 1-10526    
Entity Registrant Name UNITED-GUARDIAN, INC    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 11-1719724    
Entity Address, Address Line One 230 Marcus Blvd.    
Entity Address, City or Town Hauppauge    
Entity Address, State or Province NY    
Entity Address, Postal Zip Code 11788    
City Area Code 631    
Local Phone Number 273-0900    
Title of 12(b) Security Common Stock, $0.10 par value    
Trading Symbol UG    
Security Exchange Name NASDAQ    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Small Business true    
Entity Emerging Growth Company false    
Entity Filer Category Non-accelerated Filer    
ICFR Auditor Attestation Flag false    
Document Financial Statement Error Correction [Flag] false    
Entity Shell Company false    
Entity Public Float     $ 36,754,552
Entity Common Stock, Shares Outstanding (in shares)   4,594,319  
Auditor Firm ID 606    
Auditor Name GRASSI & CO., CPAs, P.C.    
Auditor Location Jericho, New York    
Entity Central Index Key 0000101295    
Current Fiscal Year End Date --12-31    
Document Fiscal Year Focus 2025    
Document Fiscal Period Focus FY    
Amendment Flag false