Annual report pursuant to Section 13 and 15(d)

Related Party Transactions - Additional Information (Details)

v3.20.2
Related Party Transactions - Additional Information (Details)
12 Months Ended
Dec. 07, 2018
USD ($)
Aug. 28, 2017
USD ($)
Jun. 30, 2020
USD ($)
investment
Jun. 30, 2019
USD ($)
Mar. 01, 2018
USD ($)
Sep. 19, 2017
USD ($)
Related Party Transaction [Line Items]            
Carrying Value     $ 16,763,000 $ 11,885,000    
Income (loss) from equity method investment     4,878,000 1,198,000    
Interest income     $ 600,000 100,000    
Revaluation adjustment       588,000    
Goldline, LLC            
Related Party Transaction [Line Items]            
Liabilities incurred for the acquisition $ 7,500,000 $ 7,500,000        
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     $ 700,000 6,400,000    
Stack's Bowers Galleries | March 1, 2018 Loan Agreement            
Related Party Transaction [Line Items]            
Short term loan receivable     8,000,000 7,500,000    
Affiliated entities            
Related Party Transaction [Line Items]            
Interest income     7,258,000 7,333,000    
Affiliated entities | Interest expense incurred related to long-term debt obligation            
Related Party Transaction [Line Items]            
Interest expense     0 300,000    
SilverTowne L.P. | Contingent Consideration Liability            
Related Party Transaction [Line Items]            
Revaluation adjustment     $ 0 588,000    
Goldline Lenders            
Related Party Transaction [Line Items]            
Fees related to payoff of Goldline Credit Facility       $ 200,000