Quarterly report pursuant to Section 13 or 15(d)

Goodwill and Intangible Assets (Narrative) (Details)

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Goodwill and Intangible Assets (Narrative) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended 12 Months Ended
Aug. 31, 2016
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Jun. 30, 2018
Finite-Lived Intangible Assets [Line Items]            
Goodwill   $ 8,881   $ 8,881   $ 8,881
Amortization expense related to intangible assets   252 $ 253 504 $ 410  
Goodwill and intangible asset impairment           $ 2,700
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   5,000    
Goodwill   $ 1,400   $ 1,400    
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