Quarterly report pursuant to Section 13 or 15(d)

Related Party Transactions - Additional Information (Details)

v3.21.2
Related Party Transactions - Additional Information (Details)
3 Months Ended
Sep. 30, 2021
USD ($)
investment
Sep. 30, 2020
USD ($)
Jun. 30, 2021
USD ($)
Sep. 19, 2017
USD ($)
Related Party Transaction [Line Items]        
Number of investments | investment 5      
Carrying Value $ 29,500,000   $ 18,200,000  
Earnings from equity method investments 1,489,000 $ 4,126,000    
Interest income 400,000 $ 400,000    
March 1, 2018 Loan Agreement        
Related Party Transaction [Line Items]        
Maximum borrowing capacity available $ 10,000,000.0      
Participation interest, percentage of net profits realized on sale 10.00%      
Equity method investee        
Related Party Transaction [Line Items]        
Number of investments | investment 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  
Stack's Bowers Galleries | March 1, 2018 Loan Agreement        
Related Party Transaction [Line Items]        
Short term loan receivable $ 0.0   $ 3,000,000.0