Quarterly report pursuant to Section 13 or 15(d)

Description of Business - Narrative (Details)

v3.19.3.a.u2
Description of Business - Narrative (Details)
6 Months Ended
Dec. 31, 2019
USD ($)
reportable_segments
Business Acquisition [Line Items]  
Number of reportable segments | reportable_segments 3
AM&ST Associates, LLC | AMST  
Business Acquisition [Line Items]  
Percentage of voting interests acquired (in percentage) 69.00%
AM&ST Associates, LLC | SilverTowne L.P.  
Business Acquisition [Line Items]  
Percentage of voting interests acquired (in percentage) 31.00%
Precious Metals Purchasing Partners, LLC | AMST  
Business Acquisition [Line Items]  
Percentage of voting interests acquired (in percentage) 50.00%
AM Capital Funding, LLC. | Secured Senior Term Notes, Series 2018-1, Class A | Senior Subordinated Notes  
Business Acquisition [Line Items]  
Debt instrument, face amount $ 72,000,000
Stated interest rate (in percentage) 4.98%
AM Capital Funding, LLC. | Secured Senior Term Notes, Series 2018-1, Class B | Senior Subordinated Notes  
Business Acquisition [Line Items]  
Debt instrument, face amount $ 28,000,000
Stated interest rate (in percentage) 5.98%