Annual report pursuant to Section 13 and 15(d)

Goodwill and Intangible Assets - Additional Information (Details)

v3.21.2
Goodwill and Intangible Assets - Additional Information (Details) - USD ($)
$ in Thousands
1 Months Ended 6 Months Ended 12 Months Ended
Mar. 31, 2021
Dec. 31, 2018
Jun. 30, 2021
Jun. 30, 2020
May 17, 2021
Mar. 19, 2021
Aug. 31, 2017
Aug. 31, 2016
Finite-Lived Intangible Assets [Line Items]                
Goodwill     $ 100,943 $ 8,881        
Percentage of investments in privately-held entities accounted under equity method     44.90%   44.90%      
Amortization expense related to intangible assets     $ 9,300 $ 1,000        
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%          
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%          
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              
Goodwill $ 92,100         $ 92,100    
Percentage of investments in privately-held entities accounted under equity method 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%