Quarterly report pursuant to Section 13 or 15(d)

Description of Business - Acquisitions (Details)

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Description of Business - Acquisitions (Details)
3 Months Ended 7 Months Ended 9 Months Ended
Aug. 28, 2017
USD ($)
Mar. 31, 2018
USD ($)
$ / shares
Mar. 31, 2017
USD ($)
$ / shares
Mar. 31, 2018
USD ($)
Mar. 31, 2018
USD ($)
Segment
$ / shares
Mar. 31, 2017
USD ($)
$ / shares
Aug. 31, 2016
Business Acquisition [Line Items]              
Number of reportable segments | Segment         2    
Goldline, LLC              
Business Acquisition [Line Items]              
Purchase price $ 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            
Holdback amount released       $ 0      
Net asset purchase price 10,000,000 $ 9,548,000   9,548,000 $ 9,548,000    
Purchase price adjustment       500,000      
Acquisition related costs   600,000   $ 800,000      
Pro-forma revenue   1,994,963,000 $ 1,747,526,000   5,840,648,000 $ 5,746,474,000  
Pro-forma net (loss) income   $ (633,000) $ 276,000   $ (307,000) $ 6,152,000  
Pro from basic earnings per share (usd per share) | $ / shares   $ (0.09) $ 0.04   $ (0.04) $ 0.88  
Pro from dilutive earnings per share (usd per share) | $ / shares   $ (0.09) $ 0.04   $ (0.04) $ 0.86  
Liabilities incurred for the acquisition $ 7,500,000            
AMST              
Business Acquisition [Line Items]              
Percentage of voting interests acquired (in percentage)             55.00%
SilverTowne              
Business Acquisition [Line Items]              
Percentage of voting interests acquired (in percentage)             45.00%
Pro Forma              
Business Acquisition [Line Items]              
Tax rate assumption         37.50%