Cumulative and outstanding losses.

No definition available.

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- Definition

Debt instrument issued face amount.

+ References

No definition available.

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- Definition

Equity method investments shares owned.

+ References

No definition available.

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- Definition

Mining exploratory service revenue.

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No definition available.

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- Definition

Shares received from unconsolidated entities.

+ References

No definition available.

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- Definition

The number of shares converted in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 5
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- Definition

Number of shares issued for each share of convertible preferred stock that is converted.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
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-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 29
-Article 5

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- Definition

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.

+ References

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
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- Definition

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

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-Name Accounting Standards Codification
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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
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- Definition

Amount of the entity's equity method investment which has been sold.

+ References

No definition available.

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- Definition

This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

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- Definition

Total investments in (A) an entity in which the entity has significant influence, but does not have control, (B) subsidiaries that are not required to be consolidated and are accounted for using the equity and or cost method, and (C) an entity in which the reporting entity shares control of the entity with another party or group. Includes long-term advances receivable from a party that is affiliated with the reporting entity by means of direct or indirect ownership.

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- Definition

Percentage of subsidiary's or equity investee's stock owned by parent company after stock transaction.

+ References

No definition available.

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- Definition

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.

+ References

No definition available.

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Investment in Unconsolidated Entity - Additional Information (Detail) - USD ($)		1 Months Ended	6 Months Ended	12 Months Ended
	Dec. 10, 2015	Apr. 30, 2014	Jun. 30, 2012	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Jul. 31, 2013
Face Value $10,000,000, 8% Convertible Senior Note Payable [Member]
Schedule of Equity Method Investments [Line Items]
Convertible notes							$ 500,000
Debt instrument maturity date						Apr. 26, 2014
Common Class B [Member]
Schedule of Equity Method Investments [Line Items]
Series A preferred non-voting stock converted, Number of non-voting common stock issued		522,500
Series A Preferred Stock [Member]
Schedule of Equity Method Investments [Line Items]
Debt instrument, number of shares converted		5,225
Chatham Rock Phosphate, Ltd. [Member]
Schedule of Equity Method Investments [Line Items]
Equity stake in CRP				3.00%
Investment carrying value				$ 0
Deep sea mining exploratory services			$ 1,680,000
Shares received from CRP			9,320,348
Neptune Minerals, Inc. [Member]
Schedule of Equity Method Investments [Line Items]
Net share position in NMI	6,190,201				6,190,201
Ownership percentage	28.00%			14.00%	28.00%
Equity stake in CRP	50.00%
Investment carrying value				$ 0
Neptune Minerals, Inc. [Member] \| Face Value $10,000,000, 8% Convertible Senior Note Payable [Member]
Schedule of Equity Method Investments [Line Items]
Convertible notes, interest rate						6.00%
Neptune Minerals, Inc. [Member] \| Common Class B [Member]
Schedule of Equity Method Investments [Line Items]
Net share position in NMI	6,184,976				6,184,976
Neptune Minerals, Inc. [Member] \| Series A Preferred Stock [Member]
Schedule of Equity Method Investments [Line Items]
Net share position in NMI	5,225				5,225
Neptune Minerals, Inc. [Member] \| Series A Voting Shares [Member]
Schedule of Equity Method Investments [Line Items]
Investment carrying value		$ 522,500
Neptune Minerals, Inc. [Member] \| Common Class A [Member]
Schedule of Equity Method Investments [Line Items]
Shares owned				0
Neptune Minerals, Inc. [Member] \| Common Class B Non Voting Shares [Member]
Schedule of Equity Method Investments [Line Items]
Amount of shares sold	$ 3,092,488
Number of remaining share held				$ 3,092,488
Neptune Minerals, Inc. [Member] \| Series A Preferred Non Voting Shares [Member]
Schedule of Equity Method Investments [Line Items]
Amount of shares sold	$ 2,613
Number of remaining share held				2,612
Dorado Ocean Resources, Ltd. [Member]
Schedule of Equity Method Investments [Line Items]
Loss from unconsolidated entity				$ 20,700,000