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STOCKHOLDERS' EQUITY (Details) - Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding and Exercisable - Common Class A [Member] - $ / shares
12 Months Ended
Jun. 30, 2021
Jun. 30, 2020
STOCKHOLDERS' EQUITY (Details) - Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding and Exercisable [Line Items]    
Options Outstanding, Shares 233,000  
Options Outstanding, Remaining Life in Years 9 years 11 months 12 days  
Options Outstanding, Weighted Average Exercise Price $ 6.02  
Options Exercisable, Shares 2,000  
Options Exercisable, Weighted Average Exercise Price $ 2.74  
1989 Plan [Member]    
STOCKHOLDERS' EQUITY (Details) - Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding and Exercisable [Line Items]    
Options Outstanding, Shares 231,000 0
1989 Plan [Member] | June 21, 2021 [Member]    
STOCKHOLDERS' EQUITY (Details) - Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding and Exercisable [Line Items]    
Options Outstanding, Date of Option Grant Jun. 21, 2021  
Options Outstanding, Shares 231,000  
Options Outstanding, Remaining Life in Years 9 years 11 months 23 days  
Options Outstanding, Weighted Average Exercise Price $ 6.05  
Options Exercisable, Shares 0  
Options Exercisable, Weighted Average Exercise Price $ 0  
1997 Plan [Member]    
STOCKHOLDERS' EQUITY (Details) - Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding and Exercisable [Line Items]    
Options Outstanding, Shares 2,000 2,000
1997 Plan [Member] | March 21, 2018 [Member]    
STOCKHOLDERS' EQUITY (Details) - Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding and Exercisable [Line Items]    
Options Outstanding, Date of Option Grant Mar. 21, 2018  
Options Outstanding, Shares 2,000  
Options Outstanding, Remaining Life in Years 6 years 8 months 19 days  
Options Outstanding, Weighted Average Exercise Price $ 2.74  
Options Exercisable, Shares 2,000  
Options Exercisable, Weighted Average Exercise Price $ 2.74