Quarterly report pursuant to Section 13 or 15(d)

Related Party Transactions - Additional Information (Details)

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Related Party Transactions - Additional Information (Details)
3 Months Ended 6 Months Ended
Dec. 31, 2021
USD ($)
Investment
Dec. 31, 2020
USD ($)
Dec. 31, 2021
USD ($)
Investment
Dec. 31, 2020
USD ($)
Jun. 30, 2021
USD ($)
Sep. 19, 2017
USD ($)
Related Party Transaction [Line Items]            
Number of investments | Investment 5   5      
Carrying Value $ 30,700,000   $ 30,700,000   $ 18,200,000  
Earnings from equity method investments 1,220,000 $ 2,362,000 2,709,000 $ 6,488,000    
Interest income 400,000 $ 200,000 800,000 $ 600,000    
March 1, 2018 Loan Agreement            
Related Party Transaction [Line Items]            
Maximum borrowing capacity available $ 10,000,000.0   $ 10,000,000.0      
Participation interest, percentage of net profits realized on sale 10.00%   10.00%      
Equity method investee            
Related Party Transaction [Line Items]            
Number of investments | Investment 4   4      
Stack's Bowers Galleries | September 19, 2017 Loan Agreement            
Related Party Transaction [Line Items]            
Maximum borrowing capacity available           $ 5,300,000
Short term loan receivable $ 0.0   $ 0.0   0.0  
Stack's Bowers Galleries | March 1, 2018 Loan Agreement            
Related Party Transaction [Line Items]            
Short term loan receivable $ 0.0   $ 0.0   $ 3,000,000.0