Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events - Additional Information (Details)

v3.21.1
Subsequent Events - Additional Information (Details) - USD ($)
$ in Millions
Apr. 01, 2021
Mar. 31, 2021
A Mark Precious Metals, Inc | AM&ST Associates, LLC    
Subsequent Event [Line Items]    
Percentage of ownership owned by parent   69.00%
Subsequent Event | AM&ST Associates, LLC    
Subsequent Event [Line Items]    
Business acquisition, percentage of interests acquired 30.90%  
Business combination, cash consideration $ 2.0  
Subsequent Event | A Mark Precious Metals, Inc | AM&ST Associates, LLC    
Subsequent Event [Line Items]    
Percentage of ownership owned by parent 100.00%  
Subsequent Event | A Mark Precious Metals, Inc | AM&ST Associates, LLC    
Subsequent Event [Line Items]    
Business acquisition, percentage of interests acquired 31.00%