Quarterly report pursuant to Section 13 or 15(d)

Description of Business - Narrative (Details)

v3.19.1
Description of Business - Narrative (Details)
3 Months Ended 9 Months Ended
Aug. 28, 2017
USD ($)
Mar. 31, 2019
USD ($)
Mar. 31, 2018
Mar. 31, 2019
USD ($)
Segment
Mar. 31, 2018
Dec. 07, 2018
USD ($)
Aug. 31, 2016
Business Acquisition [Line Items]              
Tax rate (in percentage)   (29.50%) 54.40%   41.80%    
Number of reportable segments | Segment       3      
AM&ST Associates, LLC | AMST              
Business Acquisition [Line Items]              
Percentage of voting interests acquired (in percentage)   69.00%   69.00%     55.00%
AM&ST Associates, LLC | SilverTowne              
Business Acquisition [Line Items]              
Percentage of voting interests acquired (in percentage)   31.00%   31.00%     45.00%
Goldline, LLC              
Business Acquisition [Line Items]              
Tax rate (in percentage)       (27.00%) 37.50%    
Estimated purchase price for net assets $ 10,000,000            
Fair value of intangible assets acquired 6,400,000            
Fair value of tangible asset acquired 3,600,000            
Holdback amount 1,500,000 $ 800,000   $ 800,000      
Liabilities incurred for the acquisition $ 7,500,000            
Debt instrument, fees (in percentage)           2.00%  
Prepayment premium           $ 150,000  
Transition service agreement, term (in years) 2 years