Expiration date of the option.

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Additional consideration percentage.

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Amortization of financing costs included in interest expense.

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Convertible notes payable outstanding.

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Debt instrument decrease in face amount.

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Debt Instrument Extended Maturity Date

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Debt instrument number of tranches.

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Debt instrument percentage of principal amount issued to initial lenders.

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Estimated market rate loan percentage.

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Marketing Fee Percentage

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Notes ceased to bear interest amount.

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Number Of Wholly Owned Subsidiaries

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Share Repurchase Agreement Expiration Date

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Stock granted percentage upon conversion of convertible securities.

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Stock granted value upon conversion of convertible securities.

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Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense.

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Including the current and noncurrent portions, carrying value as of the balance sheet date of a written promise to pay a note, initially due after one year or beyond the operating cycle if longer, which can be exchanged for a specified amount of one or more securities (typically common stock), at the option of the issuer or the holder.

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The value of the financial instrument(s) that the original debt is being converted into in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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The number of shares issued in exchange for the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or payments in the period.

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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Amount of long-term debt before deduction of unamortized discount or premium. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, with initial maturities beyond one year or the normal operating cycle, if longer.

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Identification of the lender and information about a contractual promise to repay a short-term or long-term obligation, which includes borrowings under lines of credit, notes payable, commercial paper, bonds payable, debentures, and other contractual obligations for payment. This may include rationale for entering into the arrangement, significant terms of the arrangement, which may include amount, repayment terms, priority, collateral required, debt covenants, borrowing capacity, call features, participation rights, conversion provisions, sinking-fund requirements, voting rights, basis for conversion if convertible and remarketing provisions. The description may be provided for individual debt instruments, rational groupings of debt instruments, or by debt in total.

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Face (par) amount of debt instrument at time of issuance.

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Increase for accrued, but unpaid interest on the debt instrument for the period.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

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The amount of debt discount that was originally recognized at the issuance of the instrument that has yet to be amortized.

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Amount of unused borrowing capacity under the long-term financing arrangement that is available to the entity as of the balance sheet date.

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Gross amount of debt extinguished.

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Amount of the cost of borrowed funds accounted for as interest expense.

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The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

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The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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Amount of the fee for available but unused credit capacity under the credit facility.

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Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

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Description of the interest rate for the amounts borrowed under the credit facility, including the terms and the method for determining the interest rate (for example, fixed or variable, LIBOR plus a percentage, increasing rate, timing of interest rate resets, remarketing provisions).

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The carrying value as of the balance sheet date of the current portion of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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The carrying value as of the balance sheet date of the noncurrent portion of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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Carrying value as of the balance sheet date of notes payable (with maturities initially due after one year or beyond the operating cycle if longer), excluding current portion.

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Cash and investments whose use in whole or in part is restricted for the long-term, generally by contractual agreements or regulatory requirements. For use in an unclassified balance sheet.

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Amount of consideration received by subsidiary or equity investee in exchange for shares of stock issued or sold. Includes amount of cash received, fair value of noncash assets received, and fair value of liabilities assumed by the investor.

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The number of shares issued or sold by the subsidiary or equity method investee per stock transaction.

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Per share amount received by subsidiary or equity investee for each share of common stock issued or sold in the stock transaction.

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Mortgage and Loans Payable - Project Term Loan - Additional Information (Detail)				4 Months Ended	12 Months Ended
	Dec. 10, 2015 USD ($)	May. 11, 2015 USD ($)	May. 07, 2014 USD ($)	Jun. 30, 2015 Tranches	Dec. 31, 2015 USD ($) Subsidiaries $ / shares shares	Dec. 31, 2014 USD ($) $ / shares	Dec. 31, 2013 USD ($)	Oct. 01, 2015	Mar. 11, 2015 USD ($)	Oct. 01, 2014 USD ($)	Aug. 14, 2014 USD ($)	May. 31, 2014 USD ($)	May. 10, 2012 USD ($)
Debt Instrument [Line Items]
Loan amount borrowed					$ 0
Aggregate amount issuable													$ 8,000,000
Extinguishment of debt, amount	$ 5,000,000
Debt instrument, Value of shares						$ 2,347,826	$ 8,608,694
Additional consideration percentage	21.25%
Expected interest expenses					$ 4,551,799	$ 1,560,254	$ 3,581,642
Share repurchase agreement expiration date					Mar. 30, 2016
Promissory note outstanding amount					$ 14,750,000
Call option expiration date					Mar. 11, 2016
Estimated market rate loan percentage					15.00%
Debt discount amount					$ 383,148
Debt discount amortization amount					383,148
Oceanica Call Option [Member]
Debt Instrument [Line Items]
Stock granted during period, value		$ 40,000,000			$ 40,000,000
Stock granted during period, percentage		54.00%			54.00%
Monaco Notes [Member]
Debt Instrument [Line Items]
Notes payable, carrying value					$ 3,449,632
Expected interest expenses					0
Oceanica Resources S. de. R.L [Member]
Debt Instrument [Line Items]
Per share value of shares purchased by private investor \| $ / shares						$ 2.50
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Notes carrying value					$ 0
Credit facility agreement			$ 10,000,000
Credit agreement margin, LIBOR rate			5.00%
Interest rate description					One-month LIBOR rate plus 500 basis points
Origination fee payable			$ 50,000		$ 20,000
Debt instrument extended maturity date					Dec. 17, 2015
Restricted cash deposit			$ 500,000
Promissory Note [Member]
Debt Instrument [Line Items]
Debt instrument maturity date					Mar. 18, 2017
Interest rate, stated percentage					8.00%
Call option		$ 14,750,000
Accrued interest					$ 508,055
Promissory Note [Member] \| Stock Purchase Agreement [Member] \| Minosa [Member]
Debt Instrument [Line Items]
Number of advances \| Tranches				5
Promissory Note [Member] \| Stock Purchase Agreement [Member] \| Maximum [Member] \| Minosa [Member]
Debt Instrument [Line Items]
Call option									$ 14,750,000
Promissory Note [Member] \| Oceanica Resources S. de. R.L [Member]
Debt Instrument [Line Items]
Call option					14,750,000
Second Tranche [Member] \| Promissory Note [Member] \| Oceanica Resources S. de. R.L [Member]
Debt Instrument [Line Items]
Call option					6,000,000
First Tranche [Member] \| Promissory Note [Member] \| Oceanica Resources S. de. R.L [Member]
Debt Instrument [Line Items]
Call option					2,000,000
Third Tranche [Member] \| Promissory Note [Member] \| Oceanica Resources S. de. R.L [Member]
Debt Instrument [Line Items]
Call option					3,000,000
Project Term Loans [Member]
Debt Instrument [Line Items]
Aggregate amount issuable					$ 10,000,000						$ 10,000,000	$ 10,000,000
Debt instrument maturity date					Dec. 17, 2015
Number of wholly owned subsidiaries \| Subsidiaries					2
Debt instrument, number of shares \| shares					100,000
Debt instrument, Value of shares					$ 250,000
Amortization of components included in interest expense					$ 1,895,263
Marketing program compensation expenses, percentage yet to be recognized					5.00%
Project Term Loans [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Initial principal amount of note, percent					50.00%
Project Term Loans [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Initial principal amount of note, percent					100.00%
Project Term Loans [Member] \| Oceanica Resources S. de. R.L [Member]
Debt Instrument [Line Items]
Shares issued to lender \| shares					100,000
Per share value of shares purchased by private investor \| $ / shares					$ 3.15
Aggregate value of shares issued to lender					$ 1,000,000
Project Term Loans [Member] \| Second Tranche [Member]
Debt Instrument [Line Items]
Unused borrowing capacity											2,500,000
Aggregate amount issuable										$ 2,500,000
Interest rate, stated percentage								11.00%		8.00%
Call option					2,500,000
Project Term Loans [Member] \| First Tranche [Member]
Debt Instrument [Line Items]
Loan amount borrowed											5,000,000
Unused borrowing capacity											5,000,000
Call option					5,000,000
Project Term Loans [Member] \| Third Tranche [Member]
Debt Instrument [Line Items]
Unused borrowing capacity											$ 2,500,000
Call option					2,500,000
Project Term Loans [Member] \| Amended Promissory Notes [Member]
Debt Instrument [Line Items]
Extinguishment of debt, amount					2,200,000
Notes ceased to bear interest, amount					$ 5,000,000
Debt instrument maturity date					Dec. 31, 2017
Outstanding notes balance					$ 2,800,000
Notes carrying value					3,449,632
Short term notes					308,844
Long term notes					$ 3,140,788
Loan Modification [Member] \| Oceanica Resources S. de. R.L [Member]
Debt Instrument [Line Items]
Debt instrument maturity date					Dec. 31, 2017
Call option	$ 10,000,000
Loan Modification [Member] \| Second Tranche [Member]
Debt Instrument [Line Items]
Aggregate amount issuable	$ 300,000
Debt instrument maturity date	Dec. 31, 2017
Call option	$ 2,500,000
Reduced principal amount	2,200,000
Loan Modification [Member] \| First Tranche [Member]
Debt Instrument [Line Items]
Call option	$ 5,000,000
Agreement description					Monaco agreed to cease interest as of December 10, 2015 and reduce the loan balance by (i) the cash or other value received by Monaco from the SS Central America shipwreck project (“SSCA”) or (ii) if the proceeds received by Monaco from the SSCA project are insufficient to pay off the loan balance by December 31, 2017, then Monaco can seek repayment of the remaining outstanding balance on the loan by withholding Odyssey’s 21.25% “additional consideration” in new shipwreck projects performed for Monaco in the future.
Additional consideration percentage	21.25%
Loan Modification [Member] \| Third Tranche [Member]
Debt Instrument [Line Items]
Debt instrument maturity date	Dec. 31, 2017
Call option	$ 2,500,000