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Other Long-Term Assets - Components of Other Long-Term Assets (Detail) (USD $) | Dec. 31, 2013 | Dec. 31, 2012
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Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract] |  |
Artifacts | $ 1,191,952 | $ 557,494
Deposits | 1,673,709 | 541,590
Image use rights, net | 280 | 3,646
Total other long-term assets | $ 2,865,941 | $ 1,102,730

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