Annual report pursuant to Section 13 and 15(d)

Goodwill and Intangible Assets (Narrative) (Details)

v3.10.0.1
Goodwill and Intangible Assets (Narrative) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Aug. 31, 2016
Jun. 30, 2018
Jun. 30, 2017
Mar. 31, 2018
Finite-Lived Intangible Assets [Line Items]        
Goodwill   $ 8,881 $ 8,881  
Amortization expense related to intangible assets   914 $ 422  
Impairment loss   1,364    
Impairment loss on intangibles   1,300    
Accumulated impairment   1,291    
SilverTowne Mint        
Finite-Lived Intangible Assets [Line Items]        
Intangibles acquired $ 2,500      
Goodwill acquired $ 4,300      
Goldline, LLC        
Finite-Lived Intangible Assets [Line Items]        
Intangibles assets   5,000    
Goodwill   $ 1,364   $ 1,450
Minimum        
Finite-Lived Intangible Assets [Line Items]        
Estimated useful lives of intangibles   3 years    
Maximum        
Finite-Lived Intangible Assets [Line Items]        
Estimated useful lives of intangibles   15 years    
Growth rate        
Finite-Lived Intangible Assets [Line Items]        
Indefinite-lived intangible asset, measurement input   3.00%    
Pre-tax royalty rate        
Finite-Lived Intangible Assets [Line Items]        
Indefinite-lived intangible asset, measurement input   0.50%    
Normalized tax rate        
Finite-Lived Intangible Assets [Line Items]        
Indefinite-lived intangible asset, measurement input   27.00%    
Discount rate        
Finite-Lived Intangible Assets [Line Items]        
Indefinite-lived intangible asset, measurement input   30.00%    
Income Approach Valuation Technique        
Finite-Lived Intangible Assets [Line Items]        
Valuation approach allocation   75.00%    
Income Approach Valuation Technique | Growth rate        
Finite-Lived Intangible Assets [Line Items]        
Goodwill, measurement input   3.00%    
Income Approach Valuation Technique | Normalized tax rate        
Finite-Lived Intangible Assets [Line Items]        
Goodwill, measurement input   27.00%    
Income Approach Valuation Technique | Net working capital        
Finite-Lived Intangible Assets [Line Items]        
Goodwill, measurement input   5.00%    
Income Approach Valuation Technique | Discount rate        
Finite-Lived Intangible Assets [Line Items]        
Goodwill, measurement input   30.00%    
Market Approach Valuation Technique        
Finite-Lived Intangible Assets [Line Items]        
Valuation approach allocation   25.00%    
Market Approach Valuation Technique | Revenue multiple | Minimum        
Finite-Lived Intangible Assets [Line Items]        
Goodwill, measurement input   5.00%    
Market Approach Valuation Technique | Revenue multiple | Maximum        
Finite-Lived Intangible Assets [Line Items]        
Goodwill, measurement input   10.00%    
Market Approach Valuation Technique | EBITDA multiple | Minimum        
Finite-Lived Intangible Assets [Line Items]        
Goodwill, measurement input   104.00%    
Market Approach Valuation Technique | EBITDA multiple | Maximum        
Finite-Lived Intangible Assets [Line Items]        
Goodwill, measurement input   252.00%