Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Additional Information (Details)

v3.21.2
Summary of Significant Accounting Policies - Additional Information (Details) - USD ($)
 12 Months Ended
May 17, 2021
Oct. 29, 2020
Oct. 01, 2020
Sep. 03, 2020
Sep. 19, 2019
Jun. 30, 2021
Jun. 30, 2020
Summary Of Significant Accounting Policies [Line Items]              
Restricted cash           $ 0.0 $ 200,000
Notice period to terminate contract           14 days  
Precious metals held under financing arrangements [1]           $ 154,742,000 178,577,000
Operating lease payments           $ 1,600,000  
Operating lease term (in years)           6 years  
Operating lease (percent)           4.90%  
Percentage of investments in privately-held entities accounted under equity method 44.90%         44.90%  
Metals purchase by customer maximum specified time period           1 year  
Metal delivers to customer after receiving customers deposit based on prevailing current spot price percentage           110.00%  
Unpriced metal is subject to margin call If deposit falls below percentage of value of unpriced metal           105.00%  
Percentage to remit partial payment of total order price           20.00%  
Advertising costs           $ 5,028,000 2,205,000
Cost of sales           $ 7,402,817,000 $ 5,394,121,000
Common stock, shares outstanding           11,229,657 7,031,500
Dividends declared, date   Oct. 29, 2020   Sep. 03, 2020      
Dividends declared, per common share   $ 1.50   $ 1.50   $ 1.50  
Dividends payable, date of record   Nov. 23, 2020   Sep. 21, 2020      
Dividends paid           $ 21,200,000  
Change in accounting principle, accounting standards update, adopted           true  
Change in accounting principle, accounting standards update, immaterial effect           true  
Accounting standards update [Extensible List]           us-gaap:AccountingStandardsUpdate201815Member  
Shipping and Handling              
Summary Of Significant Accounting Policies [Line Items]              
Cost of sales           $ 17,000,000.0 $ 8,000,000.0
Convertible Revolving Credit Facility              
Summary Of Significant Accounting Policies [Line Items]              
Line of credit facility, maximum borrowing capacity         $ 4,000,000.0    
Line of credit facility, interest rate         12.00%    
Line of credit facility, expiration date         Sep. 18, 2022    
Line of credit facility, percentage of outstanding principal converted into borrower's issued and outstanding common stock         22.00%    
Line of credit facility, percentage of repay outstanding unrelated third-party debt in exchange for borrower's issued and outstanding common stock         27.50%    
Line of credit facility, additional interest rate in case of default by borrower         10.00%    
Line of credit facility, entitlement of interest to lender in event of excess gross sales price         $ 9,900,000    
Line of credit facility, conversion amount $ 2,500,000   $ 1,000,000.0        
Line of credit facility, outstanding balance     3,500,000     $ 0.0 $ 3,500,000
Line of credit facility, repayment of third-party loan     $ 5,800,000        
Minimum              
Summary Of Significant Accounting Policies [Line Items]              
Estimated useful lives of related assets           3 years  
Estimated useful lives of intangibles           1 year  
Percentage of investments in privately-held entities accounted under equity method           20.00%  
Maximum              
Summary Of Significant Accounting Policies [Line Items]              
Estimated useful lives of related assets           25 years  
Estimated useful lives of intangibles           15 years  
Percentage of investments in privately-held entities accounted under equity method           50.00%  
Customer locks period for purchase price           2 years  
[1]

Includes amounts of the consolidated variable interest entity, which is presented separately in the table below.