XML 9 R1.htm IDEA: XBRL DOCUMENT v3.22.1
Document And Entity Information - shares
 9 Months Ended
Mar. 31, 2022
Apr. 29, 2022
Document Information Line Items    
Entity Registrant Name U.S. GLOBAL INVESTORS, INC.  
Trading Symbol GROW  
Document Type 10-Q  
Current Fiscal Year End Date --06-30  
Amendment Flag false  
Entity Central Index Key 0000754811  
Entity Current Reporting Status Yes  
Entity Filer Category Non-accelerated Filer  
Document Period End Date Mar. 31, 2022  
Document Fiscal Year Focus 2022  
Document Fiscal Period Focus Q3  
Entity Small Business true  
Entity Emerging Growth Company false  
Entity Shell Company false  
Document Quarterly Report true  
Document Transition Report false  
Entity File Number 0-13928  
Entity Incorporation, State or Country Code TX  
Entity Tax Identification Number 74-1598370  
Entity Address, Address Line One 7900 Callaghan Road  
Entity Address, City or Town San Antonio  
Entity Address, State or Province TX  
Entity Address, Postal Zip Code 78229  
City Area Code 210  
Local Phone Number 308-1234  
Title of 12(b) Security Class A common stock, $0.025 par value per share  
Security Exchange Name NASDAQ  
Entity Interactive Data Current Yes  
Common Class A [Member]    
Document Information Line Items    
Entity Common Stock, Shares Outstanding   12,917,072
Common Class B [Member]    
Document Information Line Items    
Entity Common Stock, Shares Outstanding   0
Common Class C [Member]    
Document Information Line Items    
Entity Common Stock, Shares Outstanding   2,068,549