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Accounts Receivable, Net And Other Receivables And Finance Loans Receivable, Net (Narrative) (Details) - USD ($)
1 Months Ended 12 Months Ended
Sep. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2021
Feb. 03, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Proceeds from disposal of equity-accounted investments (Note 9)   $ 656,000 $ 865,000 $ 0  
Interest income   1,853,000 2,089,000 2,416,000  
Cedar Cellular Investment1 Ltd [Member]          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Interest income   $ 0 0 0  
Investment In Cedar Cellular Investment One [Member]          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Equity ownership percentage   7.625%      
Investment In Cedar Cellular Investment One [Member] | Notes8.625 Percent [Member]          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Debt instrument stated interest rate   8.625%      
Bank Frick [Member]          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Proceeds from disposal of equity-accounted investments (Note 9)   $ 0 11,390,000 18,568,000  
Consideration received in cash         $ 15,000,000.0
Trade Accounts Receivable [Member]          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Remaining receivable amount   25,665,000 28,898,000    
Accounts receivable, trade, gross   11,546,000 14,413,000    
Other receivables   $ 14,628,000 $ 14,994,000    
Microlending Finance [Member]          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Gross loan allowance provision book, percent   6.50% 10.00%    
Carbon Loan [Member]          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Proceeds from disposal of equity-accounted investments (Note 9) $ 750,000        
Accounts receivable, trade, gross   $ 3,000,000.0      
Allowance for doubtful loans receivable   750,000      
Carrying value of investment in a note   250,000      
Loan receivable allowance   250,000   $ 3,000,000.0  
Notes Receivable One [Member] | Investment In Cedar Cellular Investment One [Member] | Cedar Cellular Investment1 Ltd [Member]          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Carrying value of investment in a note   $ 0 $ 0.0    
Receivable, interest rate   24.82% 24.82%    
Transactions-Switching Funds [Member]          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Other receivables     $ 3,300,000