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Other Long-Term Assets - Additional Information (Detail) (USD $) | 12 Months Ended
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Dec. 31, 2013
Maximum [Member] |
Other Long Term Assets [Line Items] |
Number of years for Image use rights | 5 years
Marine equipment deposits | $ 1,187,400
United Kingdom's Ministry of Defense [Member] |
Other Long Term Assets [Line Items] |
Deposits with United Kingdom's Ministry of Defense | 432,500
Conservation and Documentation of Artifacts [Member] |
Other Long Term Assets [Line Items] |
Deposits for conservation and documentation of artifacts | $ 100,000

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- Definition Deposits to fund conservation and documentation. + References No definition available. + Details
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- Definition Deposits with ministry of defense. + References No definition available. + Details
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- Definition The aggregate of all deposit liabilities held by the entity, including foreign and domestic, interest and noninterest bearing; may include demand deposits, saving deposits, Negotiable Order of Withdrawal (NOW) and time deposits among others. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.12) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 12 -Article 9 + Details
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- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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