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Equity-Accounted Investments And Other Long-Term Assets (Narrative) (Details)
R / shares in Units, R in Millions
3 Months Ended 12 Months Ended
Sep. 30, 2022
USD ($)
shares
Sep. 30, 2021
USD ($)
Jun. 30, 2022
USD ($)
Sep. 30, 2022
ZAR (R)
R / shares
shares
Jun. 30, 2021
USD ($)
Market value of holding $ 5,111,000   $ 5,861,000 [1]    
Cash payment for repurchase of common stock 185,000        
Allowance for doubtful loans receivable 272,000   509,000   $ 267,000
Equity Method Investment Realized Gain Loss On Disposal 248,000 $ 0      
Carbon Tech Limited [Member]          
Cash consideration received on transaction $ 500,000        
Percentage of retained equity ownership interest disposed 25.00%        
Allowance for doubtful loans receivable     $ 1,000,000.0    
Equity Method Investment Realized Gain Loss On Disposal $ 250,000        
Amount received at closing from interest sold 250,000        
Sale of interest, remaining amount 750,000        
Sale of interest, amount owned in twelve months 250,000        
Loan [Member] | Carbon Tech Limited [Member]          
Notes payable amount 750,000        
Allowance for doubtful loans receivable 750,000        
Debt, face value $ 3,000,000.0        
Finbond [Member]          
Equity-accounted investments, ownership percentage 29.30%   29.31% 29.30%  
Investment amount owned $ 6,700,000     R 120.5  
Investment shares owned | shares 245,897,968     245,897,968  
Number of shares sold | shares 81,935        
Impairment loss on equity method investment $ 1,100,000        
Share price per share | R / shares       R 0.49  
Liquidity discount 25.00%   15.00%    
Percentage of issued and outstanding shares owned by small group of shareholders 80.00%        
Equity Method Investment Realized Gain Loss On Disposal $ (2,000.000)        
Cell C [Member]          
Equity-accounted investments, ownership percentage 5.00%   15.00% 5.00%  
Investment amount owned $ 0.0   $ 0.0    
Cell C [Member] | Class A [Member]          
Investment shares owned | shares 75,000,000     75,000,000  
CPS [Member]          
Equity-accounted investments, ownership percentage 87.50%   87.50% 87.50%  
Cedar Cellular [Member]          
Equity-accounted investments, ownership percentage 7.625%     7.625%  
Mobikwik [Member]          
Equity-accounted investments, ownership percentage 10.00%   10.00% 10.00%  
Carbon [Member]          
Investment amount owned     $ 0    
[1] (A) – Derived from audited financial statements