v2.4.0.8

Organization and Business Operations (Details) (AWP, USD $) In Millions, unless otherwise specified	12 Months Ended		1 Months Ended	0 Months Ended	11 Months Ended
	Mar. 31, 2013	Aug. 01, 2012	Jul. 31, 2011 Sharing agreement acre item	Aug. 01, 2012 Karlsson	Nov. 30, 2011 Karlsson Operating Agreement acre item
Organization and Business Operations
Amount of cash contributions made	$ 11.0				$ 11.0
Number of Arizona state sections on which permits are held					42
Area transferred in exchange for equity interest (in acres)					31,000
Ownership percentage		50.00%			50.00%
Number of private mineral estate sections covered			101
Area of private mineral leases related to private mineral estates covered (in acres)			62,000
Ownership percentage acquired from Karlsson Group				50.00%

Represents the area of mineral estate transferred in exchange for equity interest under the collaborative agreement.

+ References

No definition available.

+ Details

Name:	pgrx_CollaborativeAgreementAreaOfMineralEstateTransferredInExchangeForEquityInterest
Namespace Prefix:	pgrx_
Data Type:	num:areaItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the area of private mineral estate leases related to private mineral estate sections covered under the collaborative agreement.

+ References

No definition available.

+ Details

Name:	pgrx_CollaborativeAgreementAreaOfPrivateMineralEstateSectionsCoveredUnderMineralLeases
Namespace Prefix:	pgrx_
Data Type:	num:areaItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the amount of cash contributions made during the period under the collaborative agreement.

+ References

No definition available.

+ Details

Name:	pgrx_CollaborativeAgreementCashContributions
Namespace Prefix:	pgrx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Represents the number of private mineral estate sections covered under the collaborative agreement.

+ References

No definition available.

+ Details

Name:	pgrx_CollaborativeAgreementNumberOfPrivateMineralEstateSectionsCovered
Namespace Prefix:	pgrx_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the ownership interest in equity method investment acquired.

+ References

No definition available.

+ Details

Name:	pgrx_EquityMethodInvestmentOwnershipInterestPercentageAcquired
Namespace Prefix:	pgrx_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the number of mineral estate sections covered under the entity's existing mineral rights for which permits are held by the entity.

+ References

No definition available.

+ Details

Name:	pgrx_NumberOfMineralEstateSectionsPermitsHeld
Namespace Prefix:	pgrx_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	pgrx_OrganizationAndBusinessOperationsLineItems
Namespace Prefix:	pgrx_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- 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 Statement of Financial Accounting Standard (FAS)

-Number 159

-Paragraph 18

-Subparagraph f

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 323

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 18

-Paragraph 20

-Subparagraph a (1)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Name:	us-gaap_EquityMethodInvestmentOwnershipPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

PROSPECT GLOBAL RESOURCES INC. 10-K/A