Annual report pursuant to Section 13 and 15(d)

Assets and Liabilities, at Fair Value (Narrative) (Details)

v3.10.0.1
Assets and Liabilities, at Fair Value (Narrative) (Details)
$ in Thousands
12 Months Ended
Jun. 30, 2018
USD ($)
investment
Mar. 31, 2018
USD ($)
Jun. 30, 2017
USD ($)
Goodwill [Line Items]      
Commemorative coins, held at lower of cost or market $ 99   $ 40
Goodwill 8,881   8,881
Impairment loss $ 1,364    
Number of investments | investment 2    
Equity and cost method investment $ 8,388   7,967
Goldline, LLC      
Goodwill [Line Items]      
Goodwill 1,364 $ 1,450  
Gross carrying amount - indefinite lived intangible 2,200    
Trade Name      
Goodwill [Line Items]      
Indefinite-lived intangible assets, net of accumulated impairment 3,163   2,254
Gross carrying amount - indefinite lived intangible 4,454   $ 2,254
Impairment loss $ 1,291