Related Party Transactions (Details) (USD $)	0 Months Ended	3 Months Ended				3 Months Ended							3 Months Ended
	Sep. 25, 2012	Sep. 30, 2012	Sep. 30, 2011		Jun. 30, 2012	Sep. 30, 2012 Directors and officers	Sep. 30, 2011 Directors and officers	Sep. 30, 2012 Chief Executive Officer [Member]	Sep. 30, 2012 Afinsa & Auctentia	Sep. 25, 2012 Afinsa & Auctentia	Mar. 05, 2012 Afinsa & Auctentia	Sep. 25, 2012 Afinsa & Auctentia Minimum	Sep. 30, 2012 Heinrick Kohler Auktionshaus GmbH and Heinrich Kohler Briefmarkenhandel	Sep. 30, 2011 Heinrick Kohler Auktionshaus GmbH and Heinrich Kohler Briefmarkenhandel	Sep. 30, 2012 Stacks-Bowers Numismatics LLC Revolving credit facility	Sep. 30, 2012 Trading Segment Former owner	Jun. 30, 2012 Trading Segment Former owner
Related Party Transaction [Line Items]
Royalty expense																$ 85,000	$ 504,000
Purchases of inventory related party						29,000	1,100,000
Consignment of inventory related party						0	0
Cost Of Goods, Collectibles								2,500,000
Share repurchase agreement, shares										15,609,796
Ownership of common stock by noncontrolling owners									57.00%	9.90%
Share repurchase agreement aggregate purchase price											51,170,000
Sale of common stock, net impact to working capital in cash and cash equivalents	25,600,000
Share repurchase agreement, subscription rights, shares sold	12,004,387
Share repurchase agreement, subscription rights, price per share for shares sold	$ 1.90
Aggregate proceeds for shares sold under offering	22,800,000	25,242,000	0
Number of shares sold in private placement	1,426,315
Sale price per share in private placement	$ 1.90
Aggregate proceeds from private placement	2,710,000
Share repurchase agreement, percent ownership to maintain Director												5.00%
Outstanding shares of common stock		30,628,990			32,723,000
Number of outstanding common shares owned by noncontrolling interest									3,032,271
Auction services expense		2,819,000	2,539,000	[1]									57,000	16,000
Maximum borrowing capacity															$ 2,000,000

[1] Adjusted to reflect discontinued operations. See note 3 of the notes to Condensed Consolidated Financial Statements.