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.

+ Details

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- Definition

Mining exploratory service revenue.

+ References

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

-Paragraph 3

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-Publisher SEC

-Name Regulation S-X (SX)

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-Paragraph 6

-Subparagraph (b)

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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

+ Details

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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 SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

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-Topic 210

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-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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

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-Article 5

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-Subparagraph (SX 210.5-02.22(a)(2))

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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

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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-Topic 210

-SubTopic 10

-Section S99

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-Subparagraph (SX 210.5-02.12)

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- Definition

The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

+ References

No definition available.

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Investments in Unconsolidated Entities - Additional Information (Detail) (USD $)	0 Months Ended	12 Months Ended	3 Months Ended	6 Months Ended
	Apr. 30, 2014	Dec. 31, 2013	Mar. 31, 2015	Jun. 30, 2012	Jul. 31, 2013	Dec. 31, 2011
Schedule of Equity Method Investments [Line Items]
Convertible notes, interest rate			8.00%
Common shares received in settlement of accounts receivable/Preferred Non-Voting Class A stock	5,225
Face Value $10,000,000, 8% Convertible Senior Note Payable [Member]
Schedule of Equity Method Investments [Line Items]
Convertible notes					$ 500,000
Convertible notes, maturity date		Apr. 26, 2014
Series A Preferred Stock [Member]
Schedule of Equity Method Investments [Line Items]
Preferred Voting Class A stock	522,500
Neptune Minerals, Inc. [Member]
Schedule of Equity Method Investments [Line Items]
Net share position in NMI			6,190,201
Ownership percentage			28.00%
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 A [Member]
Schedule of Equity Method Investments [Line Items]
Shares owned			0
Neptune Minerals, Inc. [Member] \| Common Class B [Member]
Schedule of Equity Method Investments [Line Items]
Net share position in NMI			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
Neptune Minerals, Inc. [Member] \| Series A Voting Shares [Member]
Schedule of Equity Method Investments [Line Items]
Investment carrying value	522,500
Chatham Rock Phosphate, Ltd. [Member]
Schedule of Equity Method Investments [Line Items]
Investment carrying value			0
Deep sea mining exploratory services				1,680,000
Shares received from CRP				9,320,348
Chatham Rock Phosphate, Ltd. [Member] \| Maximum [Member]
Schedule of Equity Method Investments [Line Items]
Equity stake in CRP			10.00%
Dorado Ocean Resources, Ltd. [Member]
Schedule of Equity Method Investments [Line Items]
Ownership percentage						41.00%
Loss from unconsolidated entity			$ 20,700,000