Quarterly report pursuant to Section 13 or 15(d)

Goodwill and Intangible Assets - Additional Information (Details)

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Goodwill and Intangible Assets - Additional Information (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended 9 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Dec. 31, 2018
Mar. 31, 2022
Mar. 31, 2021
Jun. 30, 2021
Aug. 31, 2017
Aug. 31, 2016
Finite-Lived Intangible Assets [Line Items]                
Goodwill $ 100,943     $ 100,943   $ 100,943    
Amortization expense related to intangible assets $ 7,200 $ 1,100   $ 22,900 $ 1,500      
Goodwill and intangible asset impairment     $ 2,700          
Minimum                
Finite-Lived Intangible Assets [Line Items]                
Percentage of investments in privately-held entities accounted under equity method 20.00%     20.00%        
Estimated useful lives of intangibles       1 year        
Maximum                
Finite-Lived Intangible Assets [Line Items]                
Percentage of investments in privately-held entities accounted under equity method 50.00%     50.00%        
Estimated useful lives of intangibles       15 years        
SilverTowne Mint                
Finite-Lived Intangible Assets [Line Items]                
Intangibles acquired               $ 2,500
Goodwill               $ 4,300
Goldline, LLC                
Finite-Lived Intangible Assets [Line Items]                
Intangibles acquired             $ 5,000  
Goodwill             $ 1,400  
JMB                
Finite-Lived Intangible Assets [Line Items]                
Intangibles acquired   98,000     98,000      
Goodwill   $ 92,100     $ 92,100      
Percentage of investments in privately-held entities accounted under equity method   20.50%     20.50%      
JMB | A Mark Precious Metals, Inc                
Finite-Lived Intangible Assets [Line Items]                
Percentage of ownership owned by parent   100.00%     100.00%