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INVESTMENT MANAGEMENT AND OTHER FEES (Details) - Disaggregation of Revenue - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2020
Dec. 31, 2019
Disaggregation of Revenue [Line Items]        
Other Operating Revenue $ 444 $ 0 $ 444 $ 0
Total Operating Revenue 5,165 887 8,410 1,691
Base Advisory Fee [Member[ | Investment and Advisory Services [Member] | U.S. Global Investors Funds [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 907 824 1,803 1,660
Investment Performance [Member] | Investment and Advisory Services [Member] | U.S. Global Investors Funds [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 115 (115) 124 (312)
Investment and Advisory Services [Member] | U.S. Global ETFs [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 3,647 133 5,937 254
Investment Management Services [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 4,669 842 7,864 1,602
Administrative Service [Member]        
Disaggregation of Revenue [Line Items]        
Revenues 52 45 102 89
Administrative Service [Member] | U.S. Global Investors Funds [Member]        
Disaggregation of Revenue [Line Items]        
Revenues $ 52 $ 45 $ 102 $ 89