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Discontinued Operations (Schedule of Discontinued Operations) (Details) (USD $)
 3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Selling, general and administrative expenses $ 5,499,007 $ 6,405,147 $ 15,665,812 $ 17,924,355
Other (expense)/income, net 2,845 39,352 18,204 66,012
Total nonoperating expense (63,759) (33,325) (152,362) (187,784)
Loss from discontinued operations after income taxes    (105,819)    (706,641)
Superior Galleries [Member]
        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Revenues    59    3,168,438
Cost of sales    560    2,861,477
Selling, general and administrative expenses    29,780    429,051
Depreciation and amortization    (23,727)    220,384
Total    6,613    3,510,912
Operating loss    (6,554)    (342,474)
Other (expense)/income, net    (99,265)    (358,805)
Interest expense          (5,362)
Total nonoperating expense    (99,265)    (364,167)
Loss from discontinued operations before income taxes    (105,819)    (706,641)
Income tax expense            
Loss from discontinued operations after income taxes    $ (105,819)    $ (706,641)