Quarterly report pursuant to Section 13 or 15(d)

Financing Agreements Lines of Credit (Details)

v3.19.3
Financing Agreements Lines of Credit (Details) - Line of Credit - USD ($)
3 Months Ended 39 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Jun. 30, 2019
Mar. 31, 2016
Revolving Credit Facility | LIBOR        
Debt Instrument [Line Items]        
Variable rate 2.50%      
Trading Credit Facility        
Debt Instrument [Line Items]        
Interest expense $ 2,100,000 $ 2,000,000    
Percentage of total expense recognized 41.60% 57.20%    
Effective rate of interest 4.75% 4.54%    
Trading Credit Facility | A-Mark | Trading Credit Facility        
Debt Instrument [Line Items]        
Line of credit, current borrowing capacity $ 260,000,000     $ 210,000,000
Line of credit, accordion option       $ 50,000,000
Payments of financing costs     $ 3,400,000  
Accumulated amortization of loan cost $ 400,000   $ 600,000  
Variable rate basis one-month LIBOR      
Credit facility, interest rate at period end 1.82%   2.40%  
Borrowings due on demand $ 204,000,000   $ 167,000,000  
Borrowings available 6,000,000   $ 11,600,000  
Line of credit facility, tangible net worth financial covenant $ 47,500,000      
Bridge Loan | LIBOR        
Debt Instrument [Line Items]        
Variable rate 4.50%