Annual report pursuant to Section 13 and 15(d)

Related Party Transactions (Details)

v3.10.0.1
Related Party Transactions (Details) - USD ($)
 12 Months Ended
Aug. 28, 2017
Jun. 30, 2018
Jun. 30, 2017
Mar. 01, 2018
Sep. 19, 2017
Aug. 31, 2016
Related Party Transaction [Line Items]            
Receivable   $ 13,240,000 $ 0      
Payables   8,872,000 2,353,000      
Note payable - related party   0 500,000      
Sales   425,305,000 552,695,000      
Purchases   358,003,000 55,606,000      
Income (loss) from equity method investment   421,000 94,000      
Equity method investment   7,888,000 7,467,000      
March1, 2018 Loan Agreement            
Related Party Transaction [Line Items]            
Maximum borrowing capacity available       $ 10,000,000    
Participation interest, percentage of net profits realized on sale       10.00%    
Former Parent            
Related Party Transaction [Line Items]            
Receivable   13,240,000 0      
Payables   0 27,000      
Sales   50,512,000 47,384,000      
Purchases   344,348,000 47,979,000      
Former Parent | September 19, 2017 Loan Agreement            
Related Party Transaction [Line Items]            
Short term loan receivable   3,000,000        
Maximum borrowing capacity available         $ 5,300,000  
Former Parent | March1, 2018 Loan Agreement            
Related Party Transaction [Line Items]            
Short term loan receivable   9,500,000 0      
Equity method investee            
Related Party Transaction [Line Items]            
Receivable   0 0      
Payables   920,000 558,000      
Sales   359,872,000 477,477,000      
Purchases   5,959,000 2,979,000      
SilverTowne            
Related Party Transaction [Line Items]            
Receivable   0 0      
Payables   242,000 1,768,000      
Accounts receivable   300,000        
Accrued liabilities   600,000        
Sales   14,921,000 27,834,000      
Purchases   7,696,000 4,648,000      
Affiliated entities            
Related Party Transaction [Line Items]            
Interest income   4,216,000 2,958,000      
Interest expense   648,000 3,000      
Affiliated entities | Interest Income from Secured Loans Receivable            
Related Party Transaction [Line Items]            
Interest income   290,000 171,000      
Affiliated entities | Interest Income from Finance Products            
Related Party Transaction [Line Items]            
Interest income   3,926,000 2,787,000      
Affiliated entities | Interest expense incurred related to long-term debt obligation            
Related Party Transaction [Line Items]            
Interest expense   648,000 0      
Affiliated entities | Interest expense incurred related to notes payable            
Related Party Transaction [Line Items]            
Interest expense   0 3,000      
SilverTowne Mint            
Related Party Transaction [Line Items]            
Note payable - related party           $ 500,000
Goldline Lenders            
Related Party Transaction [Line Items]            
Receivable   0 0      
Payables   7,710,000 $ 0      
Debt instrument, face amount   7,500,000.0        
Other long-term liabilities (related party)   200,000        
Goldline, LLC            
Related Party Transaction [Line Items]            
Borrowings due on demand   7,200,000        
Liabilities incurred for the acquisition $ 7,500,000          
Unamortized debt issuance expense   274,000        
Debt issuance costs, net   $ 210,000