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Inventory - Schedule of Inventory (Detail) (USD $) | Sep. 30, 2013 | Dec. 31, 2012
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Inventory Disclosure [Abstract] |  |
Artifacts | $ 5,446,668 | $ 5,743,915
Packaging | 87,000 | 131,641
Merchandise | 397,315 | 485,769
Merchandise reserve | (371,332) | (367,558)
Total inventory | $ 5,559,651 | $ 5,993,767

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