Quarterly report pursuant to Section 13 or 15(d)

Goodwill and Intangible Assets - Additional Information (Details)

v3.21.1
Goodwill and Intangible Assets - Additional Information (Details) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended 6 Months Ended 9 Months Ended
Mar. 31, 2021
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2018
Mar. 31, 2021
Mar. 31, 2020
Mar. 19, 2021
Jun. 30, 2020
Sep. 19, 2019
Aug. 31, 2017
Aug. 31, 2016
Finite-Lived Intangible Assets [Line Items]                      
Goodwill $ 101,673 $ 101,673     $ 101,673     $ 8,881      
Percentage of investments in privately-held entities accounted under equity method                 31.20%    
Amortization expense related to intangible assets   $ 1,100 $ 300   $ 1,500 $ 800          
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%     20.00%            
Estimated useful lives of intangibles         3 years            
Maximum                      
Finite-Lived Intangible Assets [Line Items]                      
Percentage of investments in privately-held entities accounted under equity method 50.00% 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     $ 98,000            
Goodwill $ 92,800 $ 92,800     $ 92,800   $ 92,800        
Percentage of investments in privately-held entities accounted under equity method 20.50% 20.50%     20.50%            
Recognized gain on intangible asset and goodwill $ 26,300                    
JMB | A Mark Precious Metals, Inc                      
Finite-Lived Intangible Assets [Line Items]                      
Percentage of ownership owned by parent 100.00% 100.00%     100.00%