Quarterly report pursuant to Section 13 or 15(d)

Related Party Transactions - Additional Information (Details)

v3.20.2
Related Party Transactions - Additional Information (Details)
3 Months Ended
Sep. 30, 2020
USD ($)
investment
Sep. 30, 2019
USD ($)
Jun. 30, 2020
USD ($)
Mar. 01, 2018
USD ($)
Sep. 19, 2017
USD ($)
Related Party Transaction [Line Items]          
Number of investments | investment 3        
Carrying Value $ 20,889,000   $ 16,763,000    
Income (loss) from equity method investment 4,126,000 $ 11,000      
Interest income $ 359,000 $ 42,000      
March 1, 2018 Loan Agreement          
Related Party Transaction [Line Items]          
Maximum borrowing capacity available       $ 10,000,000  
Participation interest, percentage of net profits realized on sale       10.00%  
Equity method investee          
Related Party Transaction [Line Items]          
Number of investments | investment 3        
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 $ 800,000   700,000    
Stack's Bowers Galleries | March 1, 2018 Loan Agreement          
Related Party Transaction [Line Items]          
Short term loan receivable $ 3,400,000   $ 8,000,000