Annual report pursuant to Section 13 and 15(d)

Description of Business - Acquisitions (Details)

v3.10.0.1
Description of Business - Acquisitions (Details)
6 Months Ended 12 Months Ended 24 Months Ended
Aug. 28, 2017
USD ($)
Jun. 30, 2018
USD ($)
Dec. 31, 2017
Jun. 30, 2018
USD ($)
Segment
$ / shares
Jun. 30, 2017
USD ($)
$ / shares
Jun. 30, 2018
USD ($)
Aug. 31, 2016
Business Acquisition [Line Items]              
Number of reportable segments | Segment       3      
Tax rate assumption   21.00% 35.00% 28.06% 35.00%    
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 $ 9,515,000   9,515,000   $ 9,515,000  
Acquisition related costs         $ 100,000 $ 800,000  
Pro-forma revenue       7,607,405,000 7,090,784,000    
Pro-forma net (loss) income       $ (3,341,000) $ 6,917,000    
Pro from basic earnings per share (usd per share) | $ / shares       $ (0.48) $ 0.98    
Pro from dilutive earnings per share (usd per share) | $ / shares       $ (0.48) $ 0.97    
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       31.00% 37.50%