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Equity-Accounted Investments And Other Long-Term Assets (Narrative) (Details)
R / shares in Units, R in Millions
1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2022
R / shares
Mar. 31, 2023
USD ($)
shares
Mar. 31, 2022
USD ($)
shares
Mar. 31, 2023
USD ($)
shares
Mar. 31, 2022
USD ($)
shares
Jun. 30, 2022
USD ($)
Mar. 31, 2023
ZAR (R)
R / shares
shares
Jun. 30, 2021
USD ($)
Market value of holding   $ 4,695,000   $ 4,695,000   $ 5,861,000 [1]    
Cash payment for repurchase of common stock   178,000   471,000        
Allowance for doubtful loans receivable   295,000   295,000   509,000   $ 267,000
Equity Method Investment Realized Gain Loss On Disposal   (329,000) $ (346,000) (193,000) $ (346,000)      
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   750,000        
Debt, face value   $ 3,000,000   $ 3,000,000        
Finbond [Member]                
Equity-accounted investments, ownership percentage   27.80%   27.80%   29.30% 27.80%  
Investment amount owned   $ 3,700,000   $ 3,700,000     R 66.3  
Investment shares owned | shares   221,160,966   221,160,966     221,160,966  
Number of shares sold | shares     17,357,346   24,818,937      
Impairment loss on equity method investment       $ 1,100,000        
Share price per share | R / shares R 0.49           R 0.30  
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     $ (300,000)   $ 400,000      
Cell C [Member]                
Equity-accounted investments, ownership percentage   5.00%   5.00%   15.00% 5.00%  
Investment amount owned   $ 0.0   $ 0.0   $ 0.0    
Cell C [Member] | Class A [Member]                
Investment shares owned | shares   75,000,000   75,000,000     75,000,000  
CPS [Member]                
Equity-accounted investments, ownership percentage   87.50%   87.50%   87.50% 87.50%  
Cedar Cellular [Member]                
Equity-accounted investments, ownership percentage   7.625%   7.625%     7.625%  
Mobikwik [Member]                
Equity-accounted investments, ownership percentage   10.00%   10.00%   10.00% 10.00%  
Carbon [Member]                
Investment amount owned           $ 0    
[1] (A) – Derived from audited financial statements