Prospect Global Resources (PGRX) 10-K/A 31 Mar 14 2013 FY Annual report (amended) Financial data

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
In Millions, except Share data, unless otherwise specified	Mar. 31, 2013	Mar. 31, 2014	Sep. 28, 2012
Document and Entity Information	'	'	'
Entity Registrant Name	'PROSPECT GLOBAL RESOURCES INC.	'	'
Entity Central Index Key	'0001477032	'	'
Document Type	'10-K/A	'	'
Document Period End Date	31-Mar-13	'	'
Amendment Flag	'true	'	'
Amendment Description	'We are filing this Amendment No. 3 on Form 10-K/A (this "Amendment") to amend our Annual Report on Form 10-K for the year ended March 31, 2013, originally filed with the Securities and Exchange Commission (the "SEC") on July 1, 2013 and subsequently amended by Amendment No. 1 on July 29, 2013 and Amendment No. 2 on February 12, 2014 (our "Form 10-K" and, together with Amendment No. 1, Amendment No. 2 and this Amendment, the "Annual Report"). This Amendment is being filed to replace the report of independent registered public accounting firm.	'	'
Current Fiscal Year End Date	'--03-31	'	'
Entity Well-known Seasoned Issuer	'No	'	'
Entity Voluntary Filers	'No	'	'
Entity Current Reporting Status	'Yes	'	'
Entity Filer Category	'Smaller Reporting Company	'	'
Entity Public Float	'	'	$55.10
Entity Common Stock, Shares Outstanding	'	5,004,578	'
Document Fiscal Year Focus	'2013	'	'
Document Fiscal Period Focus	'FY	'	'

CONSOLIDATED_BALANCE_SHEETS

CONSOLIDATED BALANCE SHEETS (USD $)	Mar. 31, 2013		Mar. 31, 2012
In Thousands, unless otherwise specified
Current assets	'		'
Cash and cash equivalents	$1,024		$11,300
Accounts receivable	6		1
Related party receivable	25		25
Other current assets	1,165		828
Total current assets	2,220		12,154
Noncurrent assets	'		'
Land	380		'
Mineral properties	13,690		12,091
Equipment (net of accumulated depreciation of $132 and $6, respectively)	613		82
Deposits	104		80
Total noncurrent assets	14,787		12,253
Total assets	17,007		24,407
Current liabilities	'		'
Accounts payable	2,849		672
Accrued liabilities	11,758		844
Current portion of long-term debt	122,032		'
Tax gross-up on note payable (Note 8)	6,226		'
Grandhaven Option (Note 11)	4,060		'
Total current liabilities	146,925		1,516
Grandhaven Option (Note 11)	'		4,060
Total liabilities	146,925		5,576
Commitments and Contingencies (Note 16)	'		'
SHAREHOLDERS' EQUITY (DEFICIT)	'		'
Preferred stock: $0.001 par value; 100,000,000 shares authorized (increased on August 27, 2012 from 10,000,000); none outstanding	'	[1]	'	[1]
Common stock: $0.001 par value; 300,000,000 shares authorized (increased on August 27, 2012 from 100,000,000); 1,451,914 and 789,783 issued and outstanding at March 31, 2013 and 2012, respectively	1	[1]	'
Additional paid-in capital	30,335	[1]	91,997	[1]
Losses accumulated in the exploration stage	-160,254	[1]	-80,400	[1]
Total shareholders' equity (deficit) - Prospect Global Resources Inc.	-129,918	[1]	11,597	[1]
Non-controlling interest	'		7,234	[1]
Total shareholders' equity (deficit)	-129,918	[1]	18,831	[1]
Total liabilities and shareholders' equity (deficit)	$17,007	[1]	$24,407	[1]
[1]	All common share amounts and computations using such amounts have been retroactively adjusted to reflect the September?4, 2013 1-for-50 reverse stock split.

CONSOLIDATED_BALANCE_SHEETS_Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Mar. 31, 2013	Mar. 31, 2012
In Thousands, except Share data, unless otherwise specified
CONSOLIDATED BALANCE SHEETS	'	'
Equipment, accumulated depreciation (in dollars)	$132	$6
Preferred stock, par value (in dollars per share)	$0.00	$0.00
Preferred stock, shares authorized	100,000,000	10,000,000
Preferred stock, shares issued	0	'
Common stock, par value (in dollars per share)	$0.00	$0.00
Common stock, shares authorized	300,000,000	100,000,000
Common stock, shares issued	1,451,914	789,783
Common stock, shares outstanding	1,451,914	789,783

CONSOLIDATED_STATEMENT_OF_OPER

CONSOLIDATED STATEMENT OF OPERATIONS (USD $)	12 Months Ended				32 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2013		Mar. 31, 2012		Mar. 31, 2013
Expenses:	'		'		'
Exploration	$18,575		$6,002		$25,223
General and administrative	48,458		17,206		67,151
Off-take arrangement fee (Note 6)	7,751		'		7,751
Total expenses	74,784		23,208		100,125
Loss from operations	-74,784		-23,208		-100,125
Other expense:	'		'		'
Derivative losses	-1,900		-39,810		-56,666
Loss on debt extinguishment	'		-2,000		-2,000
Interest, net	-7,241		-1,939		-9,300
Total other expense	-9,141		-43,749		-67,966
Income tax expense	0		'		'
Net loss	-83,925		-66,957		-168,091
Net loss attributable to non-controlling interest	4,071		3,391		7,837
Net loss attributable to Prospect Global Resources Inc.	($79,854)		($63,566)		($160,254)
Earnings per share Basic and diluted	'		'		'
Loss per share (in dollars per share)	($69.14)	[1]	($113.51)	[1]	($223.82)	[1]
Weighted average number of shares outstanding (in shares)	1,155		560		716
[1]	All common share amounts and computations using such amounts have been retroactively adjusted to reflect the September?4, 2013 1-for-50 reverse stock split.

CONSOLIDATED_STATEMENT_OF_OPER1

CONSOLIDATED STATEMENT OF OPERATIONS (Parenthetical)	0 Months Ended
	Sep. 04, 2013
CONSOLIDATED STATEMENT OF OPERATIONS	'
Reverse stock split	0.02

CONSOLIDATED_STATEMENT_OF_CASH

CONSOLIDATED STATEMENT OF CASH FLOWS (USD $)	12 Months Ended		32 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013
CASH FLOWS FROM OPERATING ACTIVITIES:	'	'	'
Net loss	($83,925)	($66,957)	($168,091)
Adjustments to reconcile net loss to net cash used in operating activities:	'	'	'
Services paid for with securities	4,653	2,064	7,033
Apollo fees paid with promissory note	6,750	'	6,750
Derivative losses	1,900	39,810	56,666
Loss on debt extinguishment	'	2,000	2,000
Stock-based compensation	16,239	9,717	25,957
Interest expense	7,250	1,939	9,309
Karlsson Group Tax Gross Up	6,226	'	6,226
Depreciation	108	5	114
Changes in operating assets and liabilities:	'	'	'
Accounts receivable	-5	-1	-6
Other current assets	163	-686	-665
Deposits	-24	-80	-104
Accounts payable	2,179	70	2,850
Accrued liabilities	3,663	770	4,518
Net cash used in operating activities	-34,823	-11,349	-47,443
CASH FLOWS FROM INVESTING ACTIVITIES:	'	'	'
Mineral properties	-1,599	-1,043	-2,690
Land acquisitions	-380	'	-380
Equipment acquisitions	-639	-81	-726
Net cash used in investing activities	-2,618	-1,124	-3,796
CASH FLOWS FROM FINANCING ACTIVITIES:	'	'	'
Proceeds from convertible notes	'	5,500	9,049
Merkin note amendment	'	-2,000	-2,000
Karlsson Note principal payments	-9,718	'	-9,718
Proceeds from common stock issued	61,883	17,994	79,932
Non-controlling interest acquisition	-25,000	'	-25,000
Net cash provided by financing activities	27,165	21,494	52,263
Net (decrease) increase in cash and cash equivalents	-10,276	9,021	1,024
Cash and cash equivalents- beginning of period	11,300	2,279	'
Cash and cash equivalents - end of period	1,024	11,300	1,024
Cash paid for interest	0	'	'
Supplemental disclosure of non-cash transactions:	'	'	'
Convertible notes and accrued interest converted into shares of common stock	'	-8,417	-9,493
Common stock attributable to reverse merger	'	'	2
Fair value of land contributed by non-controlling interest	'	'	-11,000
Note receivable in exchange for shares of common stock	'	-1,125	-1,125
Warrants issued and recorded as deferred financing costs	'	-43	-43
Grandhaven Option, net of $25,000 receivable	'	4,036	4,036
SK Land Holdings Option	$500	'	$500

CONSOLIDATED_STATEMENT_OF_CASH1

CONSOLIDATED STATEMENT OF CASH FLOWS (Parenthetical) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2013	Mar. 31, 2012
CONSOLIDATED STATEMENT OF CASH FLOWS	'	'
Grandhaven Option, receivable	$25,000	$25,000

CONSOLIDATED_STATEMENT_OF_SHAR

CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY (DEFICIT) (USD $)		Total		Common Stock		Additional Paid-in Capital		Losses Accumulated in the Exploration Stage	Non-Controlling Interest
In Thousands, except Share data, unless otherwise specified
Balance at Aug. 04, 2010		'		'		'		'	'
Increase (Decrease) in Shareholders' Equity		'		'		'		'	'
Stock issued in private placements		$54		'		$54	[1]	'	'
Stock issued in private placements (in shares)	[1]	'		328,273		'		'	'
Stock-based compensation		1		'		1	[1]	'	'
Stock-based compensation (in shares)	[1]	'		17,000		'		'	'
Contributions		11,000		'		'		'	11,000
Stock issued for services		316		'		316	[1]	'	'
Stock issued for services (in shares)	[1]	'		42,833		'		'	'
Stock acquired through merger (in shares)	[1]	'		34,700		'		'	'
Convertible notes and accrued interest converted into common stock		1,076		'		1,076	[1]	'	'
Convertible notes and accrued interest converted into common stock (in shares)	[1]	'		7,171		'		'	'
Net loss		-17,209		'		'		-16,834	-375
Balance at Mar. 31, 2011		-4,762		'		1,447	[1]	-16,834	10,625
Balance (in shares) at Mar. 31, 2011	[1]	'		429,977		'		'	'
Increase (Decrease) in Shareholders' Equity		'		'		'		'	'
Stock issued in private placements		13,972		'		13,972	[1]	'	'
Stock issued in private placements (in shares)	[1]	'		85,552		'		'	'
Stock-based compensation		9,717		'		9,717	[1]	'	'
Stock-based compensation (in shares)	[1]	'		14,000		'		'	'
Stock issued for services		2,061		'		2,061	[1]	'	'
Stock issued for services (in shares)	[1]	'		10,000		'		'	'
Convertible notes and accrued interest converted into common stock		64,800		'		64,800	[1]	'	'
Convertible notes and accrued interest converted into common stock (in shares)	[1]	'		250,254		'		'	'
Net loss		-66,957		'		'		-63,566	-3,391
Balance at Mar. 31, 2012		18,831	[1]	'		91,997	[1]	-80,400	7,234
Balance (in shares) at Mar. 31, 2012	[1]	'		789,783		'		'	'
Increase (Decrease) in Shareholders' Equity		'		'		'		'	'
Stock issued in private placements		1,000		'		1,000	[1]	'	'
Stock issued in private placements (in shares)	[1]	'		4,706		'		'	'
Stock-based compensation		16,239		'		16,239	[1]	'	'
Stock-based compensation (in shares)	[1]	'		9,000		'		'	'
Stock issued for services		4,652		'		4,652	[1]	'	'
Stock issued for services (in shares)	[1]	'		40,425		'		'	'
Non-controlling interest acquisition		-182,219		'		-179,056	[1]	'	-3,163
The Karlsson Group warrant issuance		34,620		'		34,620	[1]	'	'
Stock issued in public offerings		66,290		1	[1]	66,289	[1]	'	'
Stock issued in public offerings (in shares)	[1]	'		608,000		'		'	'
Cost of public offerings		-5,406		'		-5,406	[1]	'	'
Net loss		-83,925		'		'		-79,854	-4,071
Balance at Mar. 31, 2013		($129,918)	[1]	$1	[1]	$30,335	[1]	($160,254)	'
Balance (in shares) at Mar. 31, 2013	[1]	'		1,451,914		'		'	'
[1]	All common share amounts and computations using such amounts have been retroactively adjusted to reflect the September?4, 2013 1-for-50 reverse stock split.

CONSOLIDATED_STATEMENT_OF_SHAR1

CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY (DEFICIT) (Parenthetical)	0 Months Ended
	Sep. 04, 2013
CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY (DEFICIT)	'
Reverse stock split	0.02

Organization_and_Business_Oper

Organization and Business Operations	12 Months Ended
	Mar. 31, 2013
Organization and Business Operations	'
Organization and Business Operations	'
	Note 1—Organization and Business Operations
	Introduction
	Prospect Global Resources Inc., a Nevada corporation (individually or in any combination with its subsidiaries, “Prospect,” the “Company,” “we,” “us,” or “our”), is an exploration stage company engaged in the exploration and development of a potash deposit located in the Holbrook Basin of eastern Arizona, which we refer to as the Holbrook Project.
	We were incorporated in the state of Nevada on July 7, 2008 while our wholly owned subsidiary, Old Prospect Global, was incorporated in the state of Delaware on August 5, 2010. We hold our interest in and control the Holbrook Project through our ownership of our wholly owned subsidiary, American West Potash LLC or AWP.
	Between January and November 2011, we invested $11.0 million dollars in AWP and another party, The Karlsson Group Inc., contributed to AWP its ownership of mineral rights on eight private sections and potash exploration permits on 42 Arizona state sections, comprising a total of approximately 31,000 gross acres in the Holbrook Basin, for a 50% ownership interest in AWP. In July 2011, AWP entered into a Sharing Agreement covering 101 private mineral estate sections and related mineral leases on approximately 62,000 acres adjacent to or in close proximity to AWP’s existing mineral rights.  On August 1, 2012 we purchased The Karlsson Group’s 50% interest in AWP and became the sole owner and operator of AWP.
	American West Potash LLC
	AWP commenced operations on January 21, 2011, the date on which the Company and The Karlsson Group executed the Third Amended and Restated Operating Agreement (the “Operating Agreement”). Through AWP, we hold potash exploration permits on 38 Arizona state sections, own the mineral rights on eight private sections and hold leases for the mineral rights on 101 private sections which, in total, cover approximately 90,000 acres. The state permits are for five year terms, of which 15 expire in 2014 and 23 expire in 2015. The private leases shall continue as long as AWP performs exploration or development activity.
	During calendar year 2011, AWP acquired approximately 70 miles of 2D seismic data and completed the drilling and coring of 12 holes. The results from the seismic data and the drilling helped delineate the potash resource potential on AWP’s acreage and supported the completion of the Resource Calculation and PEA. This was combined with the historic information of approximately 58 holes in our project area. Due to the relatively shallow depth of the deposit, AWP plans to mine the potash employing conventional underground mining techniques.
	On July 27, 2011, AWP entered into a Sharing Agreement covering 101 private mineral estate sections and related mineral leases on approximately 62,000 acres adjacent to or in close proximity to its existing mineral rights covering 50 mineral estate sections in the Holbrook Basin of eastern Arizona. This Sharing Agreement provides that AWP will pay the mineral estate owners specified dollar amounts during development of AWP’s mining and processing facility, an annual base rent and a royalty for potash extracted from these estates. The term of the Sharing Agreement is for perpetuity or until the earliest of cessation of operations by AWP for 180 consecutive days or abandonment of the potash mining operation by AWP. The owners of the mineral estates can also terminate the agreement upon specified defaults by AWP, some following cure periods.
	Change in Fiscal Year End
	On March 20, 2012 the Company’s board of directors resolved to change the Company’s fiscal year end from December 31 to March 31, commencing with the 12 month period ending March 31, 2012.  As a result of this change, the Company filed a transition report on Form 10-K for the three-month transition period ended March 31, 2012. References to any of our fiscal years mean the fiscal year ending March 31 of that calendar year.
	Short-Term Liquidity and Capital Needs
	As of March 31, 2013, we had approximately $1.0 million in cash and a working capital deficit of $144.7 million, including accounts payable and accrued liabilities of $14.6 million and indebtedness of $128.3 million. Subsequent to year-end and as a result of not being able to service this debt, we entered into debt restructurings on April 15, 2013 and June 26, 2013 that extended the due dates of this debt in exchange for certain other considerations and concessions. Refer to Note 18 — Subsequent Events of the accompanying consolidated financial statements for additional information.
	As part of the Second Extension Agreement, we are required to meet the following development milestones:
	(i)             Complete total depth on at least eight wells on or before November 1, 2013,
	(ii)          Deliver a completed and updated final NI 43-101 resource report on or before February 1, 2014,
	(iii)       Deliver completed metallurgical and rock mechanic test work results that will be used to complete the mine and processing plant designs for the definitive feasibility study on or before June 1, 2014, and
	(iv)      Deliver a completed and published definitive feasibility study on or before December 31, 2014.
	In addition, under the terms of the Second Extension Agreement we are required to deposit 50% of the net proceeds of the next $24.0 million of capital we raise (for a total of $12.0 million) into escrow for Holbrook Project expenses. Two million dollars of the proceeds we received from our recent $5.0 million public offering (refer to Note 18—Subsequent Events of the accompanying consolidated financial statements) were placed into this escrow, reducing our remaining escrow obligation to $10.0 million. We are also required to pay 10% of all capital raised going forward to Karlsson and Apollo as payments on their respective promissory notes. If we do not meet any one of the required development milestones, Karlsson will be entitled to foreclose on the collateral securing the Karlsson Note, which could result in a sale of AWP or its assets to satisfy amounts owing on the note. Refer to Note 18—Subsequent Events of the accompanying consolidated financial statements for further information.
	As of July 1, 2013, we had $1.4 million of available cash (excluding the escrowed cash of approximately $2.4 million which must be used for specified purposes related to the Holbrook Project pursuant to the restructured Karlsson Note), which includes the $4.1 million of net proceeds received from the public offering that closed on June 26, 2013. We will need to raise additional capital beyond what has already been raised to complete the development milestones in the Extension Agreement. If we are unable to raise the necessary funds to satisfy these development milestones, we will consider all available options, including the filing of a voluntary bankruptcy.
	The accompanying consolidated financial statements have been prepared on a going concern basis, which contemplates the realization of assets and liquidation of liabilities in the ordinary course of business.
	At March 31, 2013, the Company has not generated any revenues to fund operations.  The continuation of the Company as a going concern is dependent upon the efforts of the Company to raise additional capital and meet operational and corporate requirements. As disclosed within these financial statements, the capital required to meet these requirements could be substantial and will require the issuance of additional debt and/or equity securities.  These requirements and potential lack of available funding raise substantial doubt as to the Company’s ability to continue as a going concern.  The consolidated financial statements do not include any adjustments that might result from the outcome of this uncertainty.

Summary_of_Significant_Account

Summary of Significant Accounting Principles	12 Months Ended
	Mar. 31, 2013
Summary of Significant Accounting Principles	'
Summary of Significant Accounting Principles	'
	Note 2—Summary of Significant Accounting Principles
	This summary of significant accounting policies of the Company is presented to assist in understanding the Company’s financial statements. The financial statements and notes are representations of the Company’s management, which is responsible for their integrity and objectivity.
	Basis of Presentation
	The accompanying consolidated financial statements of the Company have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”), the instructions to Form 10-K and applicable Articles of Regulation S-X. In the opinion of management, all of the normal and recurring adjustments necessary to fairly present the financial information set forth herein have been included.
	Principles of Consolidation
	As of March 31, 2013, the Company was the 100% owner of Prospect Global Resources Inc., a Delaware corporation (“old Prospect Global”).  Old Prospect Global is a holding company and the 100% owner of AWP; and, therefore, the Company accordingly provides the consolidated financial statements for the Company, old Prospect Global and AWP.  The purpose of consolidated financial statements is to present the results of operations and the financial position of the Company and its subsidiaries as if the group were a single company. The Company has disclosed in the financial statements the amount of non-controlling interest attributable to The Karlsson Group (prior to the August 1, 2012 acquisition of the remaining 50% non-controlling interest) and has eliminated all intercompany gains and losses. All intercompany accounts and transactions have been eliminated in the consolidation.
	Exploration Stage
	As of March 31, 2013, the Company was considered an exploration stage enterprise since none of the Company’s mineral properties had proven or probable reserves as determined under the requirements of SEC Industry Guide No. 7. Further analysis, including additional in-fill drilling and a definitive feasibility study, is required before any portion of the resource, if any, can potentially be upgraded to a proven or probable reserve status pursuant to SEC Industry Guide 7.
	Use of Estimates
	The preparation of the Company’s consolidated financial statements requires management to make judgments, estimates and assumptions that affect the reported amounts of assets and liabilities and the related disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of expenses incurred during the reporting period. The Company bases its estimates on various assumptions that are believed to be reasonable under the circumstances. Accordingly, actual results may differ significantly from these estimates under different assumptions or conditions. Significant estimates with regard to the Company’s consolidated financial statements include the fair value of mineral interests contributed by The Karlsson Group; the calculation of certain conversion features of the Company’s secured convertible notes; the embedded derivative liabilities associated with those secured convertible notes and the outstanding warrants issued by the Company (and the associated changes period to period); stock-based compensation; the liability associated with the Grandhaven Option; the fair market value of consideration associated with The Karlsson Group Acquisition and the Karlsson Note Tax Gross-Up (as defined in Note 8—Debt) amount.
	Cash and Cash Equivalents
	Cash is comprised of cash deposits held at banks.  Cash equivalents are highly liquid investments with original maturities of three months or less.  As of March 31, 2013 and 2012, the Company had no cash equivalents. During the course of our operations, our balance of cash and cash equivalents held in bank accounts may exceed amounts covered by the Federal Deposit Insurance Corporation (FDIC).
	Equipment
	Equipment is recorded at cost. Depreciation is calculated on the straight-line method over the estimated useful life of the assets. Estimated useful lives of assets currently held range from 2-10 years. The Company’s policy is to review equipment for impairment at least annually.
	Mineral Properties
	The Company is primarily engaged in the acquisition, exploration and exploitation of mineral properties with the objective of extracting minerals from these properties. Mineral property exploration costs are expensed as incurred. Costs for acquired mineral property are capitalized and then impaired if the criteria for capitalization are not met. Capitalization of mine development costs that meet the definition of an asset will commence once we have proven and probable reserves in accordance with SEC Industry Guide 7.
	In the event that a mineral property is acquired through the issuance of the Company’s shares, the mineral property is recorded at the fair value of the respective property or the fair value of common shares and other instruments issued, whichever is more readily determinable. When mineral properties are acquired under option agreements with future acquisition payments to be made at the sole discretion of the Company, those future payments, whether in cash, shares, or other instruments are recorded only when the Company has made or is obliged to make the payment or issue the shares or instruments.
	Exploration Expense
	Exploration expense includes geological and geophysical work performed on areas that do not yet have identified resources. These costs are expensed as incurred.
	Financial Instruments
	Prospect’s financial instruments consist of cash and cash equivalents, accounts receivable, notes payable, accounts payable, accrued liabilities, warrants and stock options. We carry cash and cash equivalents, accounts receivable, accounts payable, accrued liabilities and notes payable at historical costs; their respective estimated fair values approximate carrying values due to their current nature.
	We do not use derivative financial instruments to hedge exposures to cash flow, market or foreign-currency risks. However, we have in the past entered into certain financial instruments and contracts, such as convertible note financing arrangements and the Karlsson Note that contained embedded derivative features. The convertible note financing arrangements were carried as derivative liabilities, at fair value, in our financial statements until their conversion into common stock on November 22, 2011.
	Income Taxes
	The Company accounts for income taxes using the asset and liability method of accounting for deferred income taxes. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of assets and liabilities and their respective tax bases.
	A valuation allowance is required to the extent it is more-likely-than-not that a deferred tax asset will not be realized. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in operations in the period that includes the enactment date.
	The Company also reports taxes based on tax positions that meet a more-likely-than-not standard and that are measured at the amount that is more-likely-than-not to be realized. Differences between financial and tax reporting which do not meet this threshold are required to be recorded as unrecognized tax benefits. The Company classifies penalty and interest expense related to income tax liabilities as an income tax expense. There are no penalties or interest recognized in the statement of operations or accrued on the balance sheet.
	Loss per Share
	Basic loss per share of common stock is calculated by dividing net loss available to common stockholders by the weighted average number of common shares outstanding for the respective period. Diluted loss per common share reflects the potential dilution that would occur if contracts to issue common stock were exercised or converted into common stock. For the 12 months ended March 31, 2013 and 2012 and from August 5, 2010 (Inception) to March 31, 2013, basic loss per common share and diluted loss per common share were the same as any potentially dilutive shares would have been anti-dilutive to the periods. Refer to Note 15—Loss per Share for additional information.
	Equity-Based Compensation
	The Company recognizes compensation costs for share-based awards based on the estimated fair value of the employee awards on their grant date. The fair value of stock options is estimated using the Black-Scholes option pricing model. Compensation costs are recognized on a straight-line basis over each issuance’s respective vesting period.
	From time to time, the Company will issue share-based awards, including options and warrants, to non-employees. The fair value of these awards issued to non-employees (typically consultants) is measured on the earlier of the date the performance is complete or the date the consultant is committed to perform. In the event that the measurement date occurs after an interim reporting date, the awards are measured at their then-current fair value at each interim reporting date, estimated using the Black-Scholes pricing model. The fair value of these awards is expensed on a straight-line basis over the associated performance period.
	Warrants
	The Company classifies its issued and outstanding warrants as liabilities or equity in its financial statements, depending upon the criteria met and specific circumstances at a given point in time. Refer to Note 13—Equity Based Compensation and Note 14—Shareholders’ Equity for additional information.
	Recent Accounting Pronouncements
	The Company has considered recently issued accounting pronouncements and does not believe that such pronouncements are of significance, or potential significance, to the Company.

The_Karlsson_Group_Acquisition

The Karlsson Group Acquisition	12 Months Ended
	Mar. 31, 2013
The Karlsson Group Acquisition	'
The Karlsson Group Acquisition	'
	Note 3—The Karlsson Group Acquisition
	On May 30, 2012, we signed a purchase agreement with The Karlsson Group, Inc. for the acquisition of the 50% of AWP that we did not already own. We subsequently closed this acquisition on August 1, 2012 at which point we became the sole owner and operator of AWP. With the signing of the purchase agreement, we paid The Karlsson Group a non-refundable deposit consisting of (a) $6.0 million in cash, of which $5.5 million was credited against the purchase price, and (b) a warrant to purchase 112,117 shares of our common stock for $212.50 per share. At closing, we (a) paid The Karlsson Group an additional $19.5 million in cash, (b) issued them a senior secured $125.0 million promissory note and (c) granted them the right to receive 1% of the gross sales received by AWP from potash production from the real property over which AWP currently has leases, licenses and permits for mining purposes, capped at $75.0 million. We also agreed to pay The Karlsson Group an additional amount equal to 15% of the net proceeds received from a future sale of at least 50% of AWP or a merger of AWP with or into an unaffiliated entity on or prior to August 1, 2016, capped at $75.0 million.  At the closing, we also received an option, exercisable for 150 days following payment in full of the promissory note, to purchase approximately 5,080 acres in Apache County, Arizona from an affiliate of The Karlsson Group for $250,000.
	At closing, the allocation of the purchase price was recorded as an equity transaction using preliminary estimates related to the fair value of the consideration paid. As of March 31, 2013, we deemed these preliminary estimates to be final and the accounting for this transaction complete.
	On April 15, 2013 and June 26, 2013, as a condition to the restructurings of The Karlsson Group debt incurred in connection with the acquisition, we entered into amended agreements with The Karlsson Group that modified some of the terms of the original acquisition.  Refer to Note 18—Subsequent Events for additional information

Other_Current_Assets

Other Current Assets	12 Months Ended
	Mar. 31, 2013
Other Current Assets	'
Other Current Assets	'
	Note 4—Other Current Assets
	In the normal course of business, the Company pays in advance for goods and/or services to be received in the future.  As of March 31, 2013, our prepaid balances related to items such as insurance premiums, service contracts, rental agreements and various other operating pre-payments.  The SK Land Holdings Option was acquired on August 1, 2012 as part of The Karlsson Group Acquisition and represents the estimated fair value of the land option acquired as part of this acquisition.
	As we expect to receive benefits from these payments within the next 12 months, they have been reflected as current assets on the balance sheet.
		March 31, 2013		March 31, 2012
		(thousands)		(thousands)
	Prepaid insurance & rent	$	276	$	223
	Other	389		605
	SK Land Holdings Option	500		—
	Total other current assets	$	1,165	$	828

Mineral_Properties

Mineral Properties	12 Months Ended
	Mar. 31, 2013
Mineral Properties	'
Mineral Properties	'
	Note 5—Mineral Properties
	The Company is primarily engaged in the acquisition, exploration and exploitation of mineral properties with the objective of extracting minerals from these properties. Mineral property exploration costs are expensed as incurred. Costs for acquired mineral property are capitalized and then impaired if the criteria for capitalization are not met. Capitalization of mine development costs that meet the definition of an asset will commence once we have proven and probable reserves in accordance with SEC Industry Guide 7.
	In the event that a mineral property is acquired through the issuance of the Company’s shares, the mineral property is recorded at the fair value of the respective property or the fair value of common shares and other instruments issued, whichever is more readily determinable. When mineral properties are acquired under option agreements with future acquisition payments to be made at the sole discretion of the Company, those future payments, whether in cash, shares, or other instruments are recorded only when the Company has made or is obliged to make the payment or issue the shares or instruments.

Offtake_Arrangement_Fee

Off-take Arrangement Fee	12 Months Ended
	Mar. 31, 2013
Off-take Arrangement Fee	'
Off-take Arrangement Fee	'
	Note 6—Off-take Arrangement Fee
	Off-take Agreement with Sichuan Chemical
	On October 18, 2012, we entered into an agreement with Sichuan Chemical Industry Holding (Group) Co, Ltd, a Chinese limited liability company (“Sichuan”), under which Sichuan will purchase a minimum of 500,000 tonnes (on a take-or-pay basis, backed by a letter of credit) of potash from us per year for a period of ten years starting with the commencement of production from our Holbrook Project.
	Upon execution of the Sichuan agreement, we owed a one-time arrangement fee to a third party of $7.8 million, payable 50% in cash and 50% in common stock with the common stock component totaling 33,125 shares.  As of March 31, 2013, the Company had issued all 33,125 shares of the common stock and paid $2.3 million in cash to the third party.  The remaining $1.6 million is included in accrued liabilities at March 31, 2013.  This off-take arrangement fee was expensed when incurred. See also Note 19 - Restatement.

Accounts_Payable_and_Accrued_L

Accounts Payable and Accrued Liabilities	12 Months Ended
	Mar. 31, 2013
Accounts Payable and Accrued Liabilities	'
Accounts Payable and Accrued Liabilities	'
	Note 7— Accounts Payable and Accrued Liabilities
	Accrued liabilities at March 31, 2013 and 2012 included:
		March 31, 2013		March 31, 2012
		(thousands)		(thousands)
	Drilling/permitting	$	140	$	471
	Mineral lease obligations	1,500		—
	Legal	112		280
	Vacation, bonuses and severance pay	982		27
	Board of Directors’ fees	125		—
	Off-take arrangement fee	1,588		—
	Interest on promissory notes	7,229		—
	Other	82		66
	Total accrued liabilities	$	11,758	$	844
	The $1.5 million mineral lease obligation relates to amounts due various owners of private sections in accordance with the Sharing Agreement.  The off-take arrangement fee is the remainder of a one-time fee due to a third-party consulting group.  The interest on promissory notes is comprised of the interest owing under the Karlsson and Apollo notes, all of which is payable within the next 12 months. Refer to Note 8—Debt and Note 18—Subsequent Events for additional information.

Debt

Debt	12 Months Ended
	Mar. 31, 2013
Debt	'
Debt	'
	Note 8 — Debt
	Prospect’s debt consists of the following:
		March 31, 2013			March 31, 2012
		(thousands)			(thousands)
	Karlsson senior secured note	$	115,282		$	—
	Apollo unsecured notes	6,750			—
	Tax gross-up on Karlsson senior secured note	6,226			—
	Total debt	128,258			—
	Less: current portion	(128,258		)	—
	Total long-term debt	$	—		$	—
	Karlsson Note
	We issued The Karlsson Group a $125.0 million senior first priority secured promissory note at the closing of The Karlsson Group Acquisition on August 1, 2012 which bears interest at 9% per annum and which is payable on each principal payment date.  Pursuant to the terms of this note, we made principal payments totaling $9.7 million in November 2012 equal to 40% of the net proceeds received from our November equity offering.  The remaining principal balance of $115.3 million was due to have been repaid in two installments with the balance of the first installment or $40.3 million having been due on March 30, 2013 and the second installment of $75.0 million having a due date of July 31, 2013.  Unable to raise sufficient funds to repay the amounts due under the Karlsson Note on March 30, 2013, we entered into an Extension Agreements with The Karlsson Group on April 15, 2013 and June 26, 2013 that, among other things, extended the due date of the Karlsson Note. Refer to Note 18—Subsequent Events for additional information.
	In addition to the mandatory prepayments equal to 40% of the net proceeds received by the Company from any equity or debt raise completed before the Karlsson Note has been repaid in full, the Karlsson Note is also mandatorily pre-payable within five business days of a sale of at least 50% of AWP or a merger of AWP with or into an unaffiliated entity. The Karlsson Note is guaranteed by AWP and is secured by (a) a pledge by Old Prospect and (b) a lien over all the assets of Old Prospect and AWP.  Certain of these provisions were revised subsequent to year-end by the Extension Agreement.  Refer to Note 18—Subsequent Events for additional information.
	Including the tax gross-up (see below), accrued interest and the remaining unpaid principal balance, we owed The Karlsson Group approximately $128.7 million as of March 31, 2013, all of which is reflected in current liabilities at March 31, 2013.
	Karlsson Note Tax Gross-Up
	On December 24, 2012, we also became obligated to pay The Karlsson Group a tax gross-up as compensation for deferring the repayment date of the first Karlsson Note installment from December 24, 2012 to March 30, 2013, with the tax gross-up also payable on March 30, 2013.  We estimated this tax gross-up to be $6.2 million in accordance with the Karlsson Note terms.  However, this amount is subject to adjustment should retrospective tax changes occur prior to payment of this gross-up.  In accordance with accounting guidance related to contingent liabilities, the additional expense associated with the obligation to pay the tax gross-up has been included as a component of loss from operations.  This tax gross provision was subsequently modified and expanded in connection with the Extension Agreement entered into on April 15, 2013.  Refer to Note 18—Subsequent Events for additional information.
	Karlsson Note Prepayment Option
	Pursuant to the terms of the Karlsson Note, if Prospect had paid $100.0 million of principal on or before December 15, 2012, plus all accrued and unpaid interest, the entire inception date note balance of $125.0 million would have been deemed satisfied (“Prepayment Option”).
	At inception, this Prepayment Option was deemed a derivative asset meeting the definition of a financial instrument and subject to Level 3 measurement.  Accordingly, the Company was required to remeasure the fair value of this financial instrument each reporting period.  The estimated fair value of the Prepayment Option as of August 1, 2012, the inception date, was estimated at $1.9 million. In that we did not exercise our option to pay the $100.0 million on or before December 15, 2012, the fair value of the Prepayment Option was subsequently reduced to $0. This change in the fair value of the Prepayment Option of $1.9 million is included in derivative losses.
	Apollo Notes
	On March 7, 2013, we entered into a Termination and Release Agreement with certain affiliates of certain investment funds managed by Apollo Global Management, LLC (which we refer to collectively as the Apollo Parties) that terminated the agreements we entered into with the Apollo Parties in November, 2012 (as amended in December, 2012). These agreements related to a potential financing transaction (the “Apollo Financing”) with the Apollo Parties that we terminated as a result of concerns over our ability to obtain the necessary shareholder approvals needed for the Apollo Financing. The fees related to this transaction are included in G&A.
	Upon execution of the Termination and Release Agreement (i) we paid the Apollo Parties $0.8 million in cash and issued them two promissory notes (“the Apollo Notes”) totaling approximately $6.8 million as a break up and release payment and (ii) we reimbursed the Apollo Parties for $2.2 million of expenses incurred by them in connection with the Apollo Financing.
	Principal and interest on each Apollo Note is payable in full on September 3, 2013 with each note bearing interest at the rate of 11% annum.  The Apollo Notes are also subject to mandatory prepayments in amounts equal to the lessor of the then outstanding balance and 33% of the net cash proceeds received in any debt or equity offering.
	On April 15, 2013 and as a condition to the restructuring of our senior debt to The Karlsson Group (see above), the terms of the Apollo Notes were amended to extend the payment due dates and modify certain other terms.  Refer to Note 18—Subsequent Events for additional information.

Convertible_Notes

Convertible Notes	12 Months Ended
	Mar. 31, 2013
Convertible Notes	'
Convertible Notes	'
	Note 9—Convertible Notes
	As of March 31, 2013 and 2012, the Company had no outstanding convertible notes.  While no convertible notes were outstanding at these dates, the Company has issued the following convertible notes in the past, all of which have since been converted into common stock:
	In connection with the reverse merger completed on February 11, 2011, $1.0 million of the Company’s then outstanding convertible notes, which were issued in 2010, converted into 7,171 shares of our common stock.
	Between January and September 2011 the Company issued various secured convertible notes.  On November 22, 2011, these convertible notes and their associated interest were converted into common stock. The following notes were outstanding prior to their conversion on November 22, 2011:
	Secured Convertible Notes
	$2.0 million face value secured convertible note due January 24, 2012
	$0.5 million face value secured convertible note due January 24, 2012
	$2.5 million face value secured convertible note due April 24, 2012
	$1.5 million face value secured convertible note due August 3, 2012
	$1.5 million face value secured convertible note due September 18, 2012
	Accounting for the Secured Convertible Notes
	We evaluated the terms and conditions of the secured convertible notes upon their issuance and while they remained outstanding. Because the economic characteristics and risks of the equity-linked conversion options were not clearly and closely related to a debt-type host, the conversion features required classification and measurement as derivative financial instruments. The other embedded derivative features (down-round protection features, automatic conversion provisions and make whole provisions) were also not considered clearly and closely related to the host debt instruments. These features individually were not afforded the exemption normally available to derivatives indexed to a company’s own stock. Accordingly, our evaluation resulted in the conclusion that these compound derivative financial instruments required bifurcation and liability classification, at fair value. These compound derivative financial instruments consisted of (i) the embedded conversion features and the (ii) down-round protection features.
	Accounting for the Convertible Note Warrants
	Based on the terms and conditions of the convertible notes, we concluded the associated warrants did not meet the criteria for equity classification. Accordingly, our analysis resulted in the conclusion that these warrants required classification as liabilities, measured at fair value both at inception and subsequently.
	The following table reports the allocation of the proceeds from the convertible notes on the financing dates:
	Secured Convertible Notes	Merkin Note			COR Note			Hexagon Note			Avalon Note			Second
		$2.0 million			$0.5 million			$2.5 million			$1.5 million			Hexagon Note
		Face Value			Face Value			Face Value			Face Value			$1.5 million
														Face Value
		(thousands)			(thousands)			(thousands)			(thousands)			(thousands)
	Proceeds	$	(2,000	)	$	(500	)	$	(2,500	)	$	(1,500	)	$	(1,500	)
	Compound embedded derivative	10,068			333			460			708			432
	Warrant derivative liability	—			—			3,954			5,147			2,135
	Day-one derivative loss	(8,068		)	—			(1,914		)	(4,355		)	(1,067		)
	Carrying value	$	—		$	(167	)	$	—		$	—		$	—
	The carrying value of the secured convertible notes at March 31, 2013 and 2012 was nil and nil, respectively.
	Discounts (premiums) on the convertible notes stemmed from (i) the allocation of basis to other instruments issued in the transaction, (ii) fees paid directly to the creditor and (iii) initial recognition at fair value, which were lower than face value. Discounts (premiums) were amortized through charges (credits) to interest expense over the term of the debt agreement. Amortization of debt discounts amounted to $1.6 million during the period from August 5, 2010 (Inception) to March 31, 2013, $1.5 million for the year ended March 31, 2012 and nil for the year ended March 31, 2013.

Derivative_Financial_Instrumen

Derivative Financial Instruments	12 Months Ended
	Mar. 31, 2013
Derivative Financial Instruments	'
Derivative Financial Instruments	'
	Note 10—Derivative Financial Instruments
	Derivative Assets
	As of March 31, 2013 and 2012, we had no derivative assets. However, as discussed in Note 8—Debt, we recorded a $1.9 million derivative asset at the inception of the Karlsson Note on August 1, 2012 related to the Prepayment Option but when we did not exercise that option on or before December 15, 2012, the fair value of the Prepayment Option was subsequently reduced to $0 and a corresponding charge was recorded to derivative losses.
	Derivative Liabilities
	As of March 31, 2013 and 2012, the fair values of the compound embedded derivatives and the warrant derivative liabilities were nil. As discussed in Note 9—Convertible Notes, the secured convertible notes were converted into common stock on November 22, 2011. As a result of the conversions, the compound embedded derivatives were eliminated as they existed because of and derived their values from the convertible notes. Additionally, the warrant derivative liabilities were eliminated. From the inception of the financings through November 22, 2011, the warrants were required to be classified as derivative liabilities due to the down-round protection features, automatic conversion provisions, and the make-whole provisions contained in the secured convertible notes. With the conversion of the secured convertible notes on November 22, 2011, the warrants were no longer required to be carried as derivative liabilities as the provisions and features giving rise to the warrant liabilities were also eliminated. As such, the warrants were reclassified to stockholders’ equity on November 22, 2011.
	The following table summarizes the effects on our loss associated with changes in the fair values of our derivative financial instruments for the year ended March 31, 2012. For information on our $1.9 million derivative loss for the year ended March 31, 2013, please see the preceding section on Derivative Assets above.  No gain (loss) was recognized for the period August 5, 2010 (Inception) through March 31, 2011.
	Our financings giving rise to derivative financial instruments and the income effects:	Year Ended
		March 31, 2012
		(thousands)
	Compound embedded derivatives	$	(23,525	)
	Day-one derivative loss	(7,336		)
	Warrant derivative liabilities	(8,949		)
	Total derivative loss	$	(39,810	)
	Fair Value Considerations
	GAAP establishes a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. As presented in the tables below, this hierarchy consists of three broad levels:
	Level 1 valuations:	Quoted prices in active markets for identical assets and liabilities.
	Level 2 valuations:	Quoted prices for similar assets or liabilities in active markets; quoted prices for identical or similar assets or liabilities in markets that are not active; and model-derived valuations whose inputs or significant value drivers are observable.
	Level 3 valuations:	Significant inputs to valuation model are unobservable.
	We classify assets and liabilities measured at fair value in their entirety based on the lowest level of input that is significant to their fair value measurement. We measure all our derivative financial instruments that are required to be measured at fair value on a recurring basis using Level 3 inputs. Level 3 inputs are unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. However, as of March 31, 2013 and 2012 none of our outstanding instruments required fair value measurement.
	The features embedded in the secured convertible notes were combined into one compound embedded derivative that we valued using the income valuation technique using the Monte Carlo valuation model. The Monte Carlo model was believed by our management to be the best available technique for this compound derivative because, in addition to providing for inputs such as trading market values, volatilities and risk free rates, the Monte Carlo model also embodies assumptions that provide for credit risk, interest risk and redemption behaviors (i.e. assumptions market participants exchanging debt-type instruments would also consider). The Monte Carlo model simulates multiple outcomes over the period to maturity using multiple assumption inputs also over the period to maturity. As of March 31, 2013 and 2012, all of our compound embedded derivatives valued using the Monte Carlo model had been eliminated and thus no fair value measurements were required.
	The warrants were valued using a binomial-lattice-based valuation model. The lattice-based valuation technique was utilized because it embodies all of the requisite assumptions (including the underlying price, exercise price, term, volatility, and risk-free interest-rate) that are necessary to fair value these instruments. For forward contracts that contingently require net-cash settlement as the principal means of settlement, we project and discount future cash flows applying probability-weights to multiple possible outcomes. Estimating fair values of derivative financial instruments requires the development of significant and subjective estimates that may, and are likely to, change over the duration of the instrument with related changes in internal and external market factors. In addition, option-based techniques are highly volatile and sensitive to changes in the trading market price of our common stock. Because derivative financial instruments are initially and subsequently carried at fair values, our income will reflect the volatility in these estimate and assumption changes. As of March 31, 2013 and 2012, none of our outstanding warrants required fair value measurement.
	The following table sets forth a reconciliation of changes in the fair value of financial liabilities classified as Level 3 in the fair valued hierarchy:
		Derivative Financial Information
		2013			2012
		(thousands)			(thousands)
	Beginning balance as of period ended March 31	$	—		$	(17,288	)
	Total gains or losses (realized or unrealized):
	Included in earnings	—			(20,956		)
	Warrant issuances	—			(12,396		)
	Warrant reclassification to equity	—			20,228
	Debenture issuances	—			(12,001		)
	Debenture conversions	—			42,413
	Ending balance as of March 31	—			—

Grandhaven_Option

Grandhaven Option	12 Months Ended
	Mar. 31, 2013
Grandhaven Option	'
Grandhaven Option	'
	Note 11—Grandhaven Option
	On November 22, 2011, Prospect completed two transactions with entities related to Hexagon Investments, LLC (refer to Note 12—Related Party Transactions for additional information). As part of the consideration given in those transactions, Prospect must either (a) assign a 1% overriding royalty interest in AWP’s future production revenues or (b) settle the obligation through issuance of the Company’s common shares to a Hexagon related entity, Grandhaven Energy, based on the estimated fair value of a 1% royalty interest at the time of exercise (“Grandhaven Option.”).  To the extent we have not completed the assignment of this 1% royalty interest to Grandhaven Energy by December 31, 2013, Grandhaven Energy can elect to have this obligation settled through the issuance of the Company’s common shares at any time after this date.
	Therefore, upon execution of the transaction, we recognized a non-recurring liability for the fair value of the obligation. In order to establish the fair value of a 1% overriding royalty interest and ultimately our performance obligation, we used the fair value hierarchy established by GAAP. We used the lowest level of input significant to the fair value measurement, measuring the fair value of the obligation using Level 3 inputs.
	Recognizing that the Grandhaven Option derives its value from the fair value of a 1% royalty interest, we used the income approach to estimate the fair value of a 1% royalty interest. The royalty is calculated based upon anticipated gross sales of potash. To calculate the value of the 1% royalty interest at inception, management developed a model to estimate the net present value (NPV) of future gross potash sales. The model probability weighted possible outcomes utilizing varying selling price and production inputs. The discount rate applied throughout the model represented Prospect’s estimated cost of capital.
	Based on the above, the fair value for the Grandhaven Option upon issuance (November 22, 2011) was deemed to be $4.1 million.

Related_Party_Transactions

Related Party Transactions	12 Months Ended
	Mar. 31, 2013
Related Party Transactions	'
Related Party Transactions	'
	Note 12—Related Party Transactions
	Buffalo Management LLC
	Quincy Prelude LLC, one of our stockholders beneficially owning more than 5% of our common stock, owns 100% of the voting interests and 75% of the economic interests of Buffalo Management LLC (“Buffalo Management”) and has sole voting and dispositive power of the shares of our common stock owned by Buffalo Management. Chad Brownstein, one of our directors and executive vice chairman, is the sole member of Quincy Prelude LLC and has sole voting and dispositive power of the shares of our common stock beneficially owned by Quincy Prelude LLC. Barry Munitz, our chairman, owns a 15% non-voting economic interest in Buffalo Management.
	On August 1, 2012 we entered into a termination of the management services agreement with Buffalo Management.  The management services agreement, which was terminable only by Buffalo Management, provided for fees to Buffalo Management for management services rendered in connection with significant transactions such as acquisitions, dispositions and financings.  Also on August 1, 2012, Chad Brownstein, the principal at Buffalo Management who rendered services to us pursuant to the management services agreement and our non-executive board chairman at the time, became our executive vice chairman.
	Pursuant to the termination agreement we: (i) paid Buffalo Management $975,000 in cash and issued them a warrant to purchase 7,043 shares of our common stock for $130.00 per share in satisfaction of the $1.5 million fee payable to Buffalo Management in connection with the acquisition of the 50% of American West Potash that we did not previously own and described above in Note 3—The Karlsson Group Acquisition; (ii) issued Buffalo Management a warrant to purchase 5,366 shares of our common stock for $130.00 per share in connection with services rendered by Buffalo Management in connection with our July, 2012 public offering of 308,000 shares of common stock at $130.00 per share; and (iii) issued Buffalo a warrant to purchase 40,000 shares of our common stock for $130.00 per share in consideration of Buffalo Management’s terminating its right to future transaction fees and the $20,000 monthly consulting fee under the management services agreement.  The fee payable to Buffalo Management equal to 2% of Prospect Global’s annual gross revenues in perpetuity and provided for under Section 2(a) of the management services agreement survived the termination.  On April 15, 2013 and as a condition to the Extension Agreement entered into with The Karlsson Group on this same date, this 2% fee was reduced to 1% in exchange for consideration yet to be determined.  Refer to Note 18—Subsequent Events for additional information.
	The warrant to purchase an aggregate of 52,409 shares of our common stock for $130.00 per share that we issued to Buffalo Management on August 1, 2012 is exercisable through July 31, 2017, subject to a two year extension in the event of a change of control of Prospect Global.  The fair value of the warrant issued to Buffalo Management on August 1, 2012 was estimated at $5.2 million using the Black-Scholes pricing model.  Significant inputs included the Company’s stock price, an estimated term of five years, estimated volatility of 177.26%, risk free rate of 0.61% and no dividends.  We also amended our registration rights agreement with Buffalo Management to cover the shares issuable pursuant to the August 1, 2012 warrant.  The amended registration rights agreement provides for demand and piggy-back registration rights, provided that each demand registration is limited to 22,000 shares.
	During the 12 months ended March 31, 2013 and 2012 and for the period from inception through March 31, 2013, Prospect paid Buffalo Management approximately $1.1 million, $0.3 million and $1.4 million, respectively.  As of March 31, 2013 and 2012, accrued liabilities included nil and twenty-five thousand dollars, respectively, related to amounts owing to Buffalo Management.
	Brownstein Hyatt Farber Schreck, LLP
	Chad Brownstein, one of our directors and executive vice chairman, is the son of a founding partner of Brownstein Hyatt Farber Schreck, LLP (“Brownstein Hyatt”), which serves as Prospect Global’s principal outside legal counsel. Mr. Brownstein’s father controls 35,563 shares of Prospect Global’s common stock which includes the 15,640 shares issued in May 2013 in lieu of payment for services then owing (see below). During the 12 months ended March 31, 2013 and 2012 and for the period from inception through March 31, 2013, Prospect paid Brownstein Hyatt approximately $3.6 million $0.5 million and $4.3 million, respectively, in legal and lobbying/permitting fees. Approximately $0.8 million and $0.3 million payable to Brownstein Hyatt are included in accrued liabilities and accounts payable as of March 31, 2013 and 2012, respectively. Chad Brownstein does not share in any of these fees.
	On July 2, 2012, we issued Brownstein Hyatt ten year options to purchase 2,400 shares of our common stock at $130.00 per share as compensation.  In May 2013, we entered into an agreement with Brownstein Hyatt under which Brownstein Hyatt received 15,640 shares of our common stock in lieu of payment for services owing at March 31, 2013 in the amount of $0.2 million.
	Hexagon Investments, LLC / Grandhaven Energy, LLC / Very Hungry LLC /Scott Reiman 1991 Trust
	One of our former board members, Scott Reiman, who served on our board from August 2011 to March 2012, is the founder of Hexagon Investments, LLC (“Hexagon”). Hexagon was not a related party prior to these transactions. The relationship between Hexagon, Grandhaven Energy, Very Hungry and the Scott Reiman 1991 Trust and the details of our transactions with these entities are summarized below:
	·              On April 25, 2011, we issued a $2.5 million face value secured convertible note in exchange for net proceeds of $2.5 million. The note converted into 17,630 shares of our common stock on November 22, 2011. We also issued Hexagon two warrants to purchase our common stock. The first warrant is exercisable until April 25, 2013 for up to 13,333 of our shares at an exercise price of $150.00 per share. The second warrant is exercisable until April 25, 2014 for up to 50,000 of our shares at an exercise price of $150.00 per share. In connection with issuance of the convertible note we granted piggy-back registration rights to Hexagon for the shares issuable upon conversion of the note and exercise of the warrants.
	·                  On September 19, 2011, we issued a $1.5 million convertible secured note in exchange for net proceeds of $1.5 million. This note converted to 7,981 shares of our common stock on November 22, 2011. We also issued Hexagon a warrant to purchase up to 19,608 shares of our common stock at an exercise price of $191.50 per share, which is exercisable until September 18, 2013. In connection with issuance of the convertible note, we granted piggy-back registration rights to Hexagon for the shares issuable upon conversion of the note and exercise of the warrants.
	·                  On November 22, 2011 we sold 51,765 shares of common stock and a warrant to purchase 51,765 shares of common stock at $212.50 per share for total cash proceeds of $11.0 million to Very Hungry LLC, an affiliate of Hexagon. The warrant is exercisable at any time through August 5, 2013. We granted piggy-back registration rights for the shares purchased and issuable upon exercise of the warrant.
	Also on November 22, 2011 we entered into a royalty agreement with Grandhaven Energy, LLC, an affiliate of Hexagon, whereby we sold Grandhaven an overriding royalty interest of 1% of the gross proceeds received by our subsidiary AWP from the extraction of potash from its existing land holdings for $25,000 cash. If (i) the Arizona State Land Department declines to issue any lease to AWP with respect to any state exploration permit, or (ii) the Arizona State Land Department terminates any state exploration permit, or (iii) the Arizona State Land Department refuses to consent to the assignment of any royalty interests in any Arizona state lease, or requires any reduction of or imposes any condition on such royalty interests as a condition of approving an assignment of such royalty interests or approving any royalty reduction or other action with respect to a state lease, or (iv) if AWP has not been issued all of the state leases and conveyed to Grandhaven all royalty interests in all of AWP’s Arizona state leased premises on or before March 1, 2013, Grandhaven has the option to receive substitute royalty interests from us in the same number of acres in portions of our non-Arizona state properties, in a percentage sufficient to compensate Grandhaven for the reduced royalty interests in the affected state lease. If AWP has not been issued any Arizona state leases as of the date that AWP conveys assignments of the royalty interest in the non-Arizona state properties Grandhaven may elect to receive in substitution an assignment of a 1.388% royalty interest in all of the non-Arizona state leased premises. If we do not deliver assignments of the royalty interest from AWP to Grandhaven by December 31, 2013, Grandhaven has the option, at any time thereafter, to purchase shares of our common stock at $212.50 per share in exchange for the surrender by Grandhaven of royalty interests for which assignments have not been obtained, valued at their fair market value at that time (collectively the “Grandhaven Option”).
	·            Grandhaven Energy controls Very Hungry LLC.  Conway Schatz, a manager of Very Hungry, joined our board of directors effective April 1, 2012 and currently holds 2,800 options to purchase shares of our common stock at an exercise price of $130.00 per share.  Mr. Schatz does not have dispositive power over the shares owned by Very Hungry.
	·              On June 7, 2012, Hexagon consummated the contribution of all of its shares of common stock and warrants to purchase common stock to Very Hungry. Subsequent to that transaction, the Scott Reiman 1991 Trust liquidated its membership Interest in Very Hungry and received a pro rata distribution of its interests in Very Hungry, including equity securities of Prospect.
	·              On July 5, 2012, Very Hungry purchased 96,154 shares of our common stock at $130.00 per share in a public offering for total cash proceeds of $12.5 million.
	·              On May 2, 2013, we borrowed $5.0 million from Very Hungry, LLC and the Scott Reiman 1991 Trust in exchange for $5.5 million in unsecured, subordinated promissory notes.  In consideration for this loan, we reduced the exercise price on all warrants to purchase our common stock held by the lenders to $15.00 per share (from exercises prices ranging from $212.50 per share to $150.00 per share) and extended the maturity of all these warrants to August 1, 2017. Very Hungry, LLC and the Scott Reiman 1991 Trust have agreed to invest their $5.5 million subordinated notes in convertible preferred stock that would be automatically convertible upon stockholder approval of the conversion into the same securities issued in the public offering that closed on June 26, 2013. Refer to Note 18—Subsequent Events for additional information.
	Intercompany Receivables from AWP
	The Company paid certain expenses in 2013 and 2012 on behalf of AWP. All intercompany receivables and payables have been eliminated from our consolidated financial statements as of March 31, 2013 and 2012.

Equity_Based_Compensation

Equity Based Compensation	12 Months Ended
	Mar. 31, 2013
Equity Based Compensation	'
Equity Based Compensation	'
	Note 13—Equity Based Compensation
	Stock Options
	Effective August 22, 2011, the Board and the shareholders approved both the 2011 Employee Equity Incentive Plan (“Employee Plan”) and 2011 Director and Consultant Equity Incentive Plan (“Director Plan”). Amendments to increase the allowable shares to be issued under both Plans were approved by shareholders of the Company on August 27, 2012. The amended Employee Plan authorizes the Board, or its designated committee, to issue up to an aggregate of 270,000 shares, of which 177,340 remained available for issuance at March 31, 2013. The amended Director Plan authorizes the Board, or its designated committee, to issue up to an aggregate of 164,000 shares, of which 70,500 remained available for issuance at March 31, 2013. Awards issued under the Plans may include stock options, stock appreciation rights, bonus stock and/or restricted stock. Awards may be settled in cash, stock or a combination thereof, at the discretion of the Board.
	Compensation expense for employees is recognized based on the estimated fair value of the awards on their grant date.  The fair value of options issued to non-employees is measured on the earlier of the date the performance is complete or the date the non-employee is committed to perform. In the event the non-employee measurement date occurs after an interim reporting date, the options are measured at their then-current fair value at each interim reporting date.  For both employee and non-employee options, fair value is estimated using the Black-Scholes option pricing model. Compensation expense is recognized on a straight-line basis over each grant’s respective vesting period for employees and service period for non-employees. Key inputs and assumptions used in estimating the fair value include our stock price, the grant price, expected term, volatility and the risk-free rate. Assumptions used in estimating the fair value of awards granted through March 31, 2013 included the following:
	Expected term	5.0 to 9.47 years
	Volatility*	128.57% to 181.46%*
	Risk-free rate	0.63% to 2.00%
	Dividend yield	—
	*       The Company’s estimates of expected volatility are based on the historic volatility of the Company’s common stock as well as the historic volatility of the Company’s peers due to the limited availability of historical trading information on the Company itself.
	A summary of stock option activity under the Plans as of March 31, 2013 and changes during the year then ended is presented below.
	Stock Options	Shares (000)		Weighted-		Aggregate		Weighted-
				Average		Intrinsic		Average
				Exercise		Value ($000)		Remaining
				Price				Term (Years)
	Outstanding at March 31, 2012	68		$	212.5	$	19,636	7.69
	Granted	127		130.66		—		9.01
	Exercised	—		—		—		—
	Forfeited or expired	(9	)	130		—		—
	Outstanding at March 31, 2013	186		160.71		—		9.02
	Vested at March 31, 2013	132		171.67		—		8.87
	The weighted average grant date fair value of the stock options granted for the 12 months ended March 31, 2013 and 2012 and for the period August 5, 2010 (Inception) through March 31, 2013 was $95.24, $156.77 and $108.43, respectively.  A total of 43,060 stock options have been forfeited since August 5, 2010 (Inception), while none have expired.
	A summary of the status of the non-vested stock options as of March 31, 2013, and changes during the year ended March 31, 2013 is presented below.
	Non-vested Stock Options	Shares (000)		Weighted Average
				Grant Date
				Fair Value
	Non-vested at March 31, 2012	20		$	123.48
	Granted	127		95.24
	Vested	(84	)	96.24
	Forfeited	(9	)	123.1
	Non-vested at March 31, 2013	54		99.63
	As of March 31, 2013, there was $2.2 million of total unrecognized compensation expense related to non-vested share based compensation arrangements granted under the Plans. That cost is expected to be recognized over a weighted average period of approximately one year. The total expense for the fair value of vested grants during the 12 months ended March 31, 2013 and 2012 was $10.3 million and $9.7 million, respectively.  For the period August 5, 2010 (Inception) to March 31, 2013 the cumulative expense was $16.9 million.
	Warrants Issued for Services
	The Company has issued 97,936 warrants to purchase shares of common stock to non-employees in exchange for services, with exercise prices ranging from $62.50 to $251.00.  For these awards, fair value is estimated using the Black-Scholes pricing model.  Expense is recognized on a straight-line basis over each grant’s respective service period. Key inputs and assumptions used in estimating the fair value include our stock price, the grant price, expected term, volatility and the risk-free rate. Assumptions used in estimating the fair value of awards granted through March 31, 2013 included the following:
	Expected term	2.0 to 5.0 years
	Volatility*	106.22% to 177.26%*
	Risk-free rate	0.22% to 1.52%
	Dividend yield	—
	*          The Company’s estimates of expected volatility are based on the historic volatility of the Company’s common stock as well as the historic volatility of the Company’s peers due to the limited availability of historical trading information on the Company itself.
	The expense recognized within G&A related to these awards amounted to $5.9 million and nil for the 12 months ended March 31, 2013 and 2012 and $5.9 million for the cumulative period ended March 31, 2013.
	The Company is currently committed to issuing an additional 800 warrants for services in the next twelve months under an existing consulting contract. Refer to Note 16—Commitments and Contingencies for additional information.

Shareholders_Equity

Shareholders' Equity	12 Months Ended
	Mar. 31, 2013
Shareholders' Equity	'
Shareholders' Equity	'
	Note 14—Shareholders’ Equity
	On August 30, 2013, the shareholders of the Company approved a reverse stock split of the Company’s common stock (the “reverse stock split”) at a ratio of 1-for-50. The reverse stock split became effective September 4, 2013. All share and per share amounts in these financial statements have been retroactively adjusted to reflect the reverse stock split.
	Common Stock
	The Company is authorized to issue 300,000,000 shares of common stock, with a par value of $0.001 per share, under the terms of the Company’s Amended and Restated Articles of Incorporation. As of March 31, 2013, there were 1,451,914 shares of our common stock issued and outstanding. In addition, we have commitments to issue another 13,500 shares under an existing service contract. Refer to Note 16—Commitments and Contingencies for additional information.
	Preferred Stock
	The Company is authorized to issue 100,000,000 shares of preferred stock, with a par value of $0.001 per share, under the terms of the Company’s Amended and Restated Articles of Incorporation. As of March 31, 2013, no shares of our preferred stock had been issued.
	Investor Warrants
	As part of its fundraising efforts, the Company has issued warrants from time to time to various investors to purchase shares of its common stock. As of March 31, 2013, a total of 313,058 investor warrants had been issued and remained outstanding. The exercise price and remaining exercise period of these warrants range from $150.00 to $212.50 and from 0.1 to 6.2 years, respectively.
	The exercise prices and expiration dates for 134,706 of these warrants were subsequently modified in connection with the $5.0 million Bridge Loan Financing completed on May 2, 2013.  Refer to Note 18—Subsequent Events for additional information.
	Non-Controlling Interest
	The Company included The Karlsson Group’s initial $11.0 million contribution of mineral interests to AWP in non-controlling interest on the balance sheet, net of its share of losses. Through this contribution, The Karlsson Group earned its 50% interest in AWP. The Company earned its initial 50% interest in AWP through its cash contributions of $11.0 million.
	Prior to the closing of The Karlsson Group Acquisition on August 1, 2012, Prospect was the 50% owner of AWP, operated and controlled AWP, and accordingly historically provided consolidated financial statements for Prospect and AWP. As such, the remaining 50% interest in AWP owned by The Karlsson Group was considered a non-controlling interest through the August 1, 2012 acquisition date.
	With the completion of The Karlsson Group Acquisition on August 1, 2012 and in accordance with GAAP that calls for any change in a parent’s ownership of a non-controlling interest to be accounted for as an equity transaction, The Karlsson Group Acquisition was treated as a distribution through equity and accordingly no step-up in basis of the assets acquired occurred.

Loss_per_Share

Loss per Share	12 Months Ended
	Mar. 31, 2013
Loss per Share	'
Loss per Share	'
	Note 15—Loss per Share
	The following sets forth the computation of basic and fully diluted weighted average shares outstanding and loss per share of common stock for the periods indicated:
		Year Ended			Year Ended			Cumulative from
		March 31,			March 31,			August 5, 2010
		2013			2012			(Inception)
								through March
								31, 2013
		(thousands, except per share amounts)
	Net loss attributable to Prospect Global Resources Inc.	$	(79,854	)	$	(63,566	)	$	(160,254	)
	Weighted average number of common shares outstanding — basic	1,155			560			716
	Dilution effect of restricted stock and warrants	—			—			—
	Weighted average number of common shares outstanding — fully diluted	1,155			560			716
	Loss per share of common stock:
	Basic and fully diluted loss per share of common stock	$	(69.14	)	$	(113.51	)	$	(223.82	)
	The Company has issued warrants to purchase shares of our common stock. These warrants, along with outstanding options (described in Note 13—Equity Based Compensation and Note 14—Shareholders’ Equity), were not included in the computation of loss per share above as to do so would have been antidilutive for the periods presented. The potentially dilutive warrants, grants and options totaled 0.6 million shares as of March 31, 2013.

Commitments_and_Contingencies

Commitments and Contingencies	12 Months Ended
	Mar. 31, 2013
Commitments and Contingencies	'
Commitments and Contingencies	'
	Note 16—Commitments and Contingencies
	Litigation
	We have received correspondence from a shareholder who purchased $10 million of shares in our November 2012 public offering asserting a right to rescind the purchase based on violation of securities laws in connection with that offering.  We believe the claim is without merit and are vigorously defending against it.  No litigation has been commenced in this matter. In a letter dated June 14, 2013, the four underwriters in our November 2012 public offering notified us that they received a letter from this stockholder in which the stockholder elected to void its purchase of shares in our November 2012 public offering. Pursuant to the terms of the underwriting agreement we entered into with the underwriters in our November 2012 public offering, the underwriters requested that we appoint counsel for the underwriters to advise on this matter, subject to their determination that counsel is satisfactory, or, alternatively, we may authorize the underwriters to employ counsel at our expense.
	In the normal course of operations, Prospect and its subsidiaries may be subject to litigation. As of March 31, 2013, there were no material litigation matters. The Company holds various insurance policies in an attempt to protect it and investors.
	The Karlsson Group Acquisition
	The execution of The Karlsson Group Acquisition agreements (and subsequent amendments thereto in April and June 2013, refer to Note 18—Subsequent Events) subjected the Company to various commitments and contingencies, including:
	a)  We granted The Karlsson Group the future right to receive payments equal to 2% of the gross sales received by us from potash production from any property over which we currently have leases, licenses and permits or which AWP may hereafter acquire.
	b)  In the event of a sale of at least 50% of AWP or a merger of AWP with or into an unaffiliated entity on or prior to February 1, 2018, we agreed to pay The Karlsson Group an additional payment equal to 15% of the net proceeds received from the transaction, capped at $75.0 million (a “Supplemental Payment”).
	c)  The Karlsson Group will recognize taxable gain on principal payments that it receives under the Karlsson Note.  We agreed to compensate The Karlsson Group for any incremental income tax liabilities attributable to an increase in federal or state income tax rates over the tax rates that were in effect for 2012, such that the Karlsson Group is made whole with respect to any such increase in tax liabilities.  We also agreed to compensate The Karlsson Group for certain interest charges imposed on the deferred tax liabilities as a result of the application the “installment sale” rules of the Internal Revenue Code.  Based on current tax and interest rates, the combined cost of these “gross-up” payments would be approximately $26.3 million.  However, this is an estimate only, and the amount of the tax gross-up payments is subject to change based on future tax rate changes and/or changes in certain interest rates published by the Internal Revenue Service.
	d)  We are required to meet the following development milestones: (i) complete total depth on at least eight wells on or before November 1, 2013, (ii) deliver a completed and updated final NI 43-101 resource report on or before February 1, 2014, (iii) deliver completed metallurgical and rock mechanic test work results that will be used to complete the mine and processing plant designs for the definitive feasibility study on or before June 1, 2014 and (iv) deliver a completed and published definitive feasibility study on or before December 31, 2014.  We will need to raise additional capital beyond what has already been raised to complete these development milestones. If we are unable to raise the necessary funds to satisfy these development milestones, The Karlsson Group could declare us to be in default, causing all of our then outstanding debt to be immediately due and payable and allowing The Karlsson Group to foreclose on their collateral.. Refer to Note 18—Subsequent Events for additional information.
	The Apollo Notes
	In the event of any equity or debt offering completed by the Company while the Apollo Notes remain outstanding, we have agreed to pay Apollo 10% of the gross proceeds raised (following the first $10.0 million of capital raised) as a prepayment of the outstanding principal.
	Buffalo Management Royalty Amendment
	In connection with restructuring the Karlsson senior debt, we were required to increase Karlsson’s royalty interest from 1% to 2% without increasing the aggregate amount of royalty interests payable to third parties in the aggregate. In order to achieve this result, we negotiated with Buffalo Management, or Buffalo, to reduce our royalty payable to Buffalo from 2% to 1%. We agreed to compensate Buffalo for this royalty reduction by giving Buffalo either, or a combination of, at its election, (i) equity securities (that may include common stock, preferred stock or warrants for common stock as mutually agreed) equal in value to the determined fair market value of the royalty surrendered or (ii) preferred stock that is redeemable after we commence receiving revenues from the Holbrook Project for the determined fair market value plus accrued interest; provided that no securities shall be issued to Buffalo prior to July 1, 2013 and provided further that in no event will any equity securities or securities convertible into equity securities issued to Buffalo (x) exceed 10% of our outstanding capital stock or (y) be redeemable for aggregate consideration exceeding 10% of our equity market capitalization. To value the surrendered royalty we agreed to engage a third party valuation firm reasonably satisfactory to Buffalo.
	Common Stock and Warrant Commitments
	As of March 31, 2013, the Company had commitments to issue an additional 13,500 shares of our common stock and 1,600 warrants to purchase shares of our common stock in exchange for services under existing consulting contracts.  The 13,500 shares of common stock are due in quarterly increments of 1,500 shares each, with the next increment being due on April 5, 2013.  The 1,600 warrants are due in monthly tranches of 200 immediately exercisable warrants, with each such warrant tranche having a five year duration and a strike price equal to the most recent sales price of our common stock as reported on Nasdaq.  The due date for the next warrant tranche is April 1, 2013. As of the July 1, 2013, these commitments had been reduced to 1,200 shares of our common stock and 800 warrants to purchase shares of our common stock.

Income_Taxes

Income Taxes	12 Months Ended
	Mar. 31, 2013
Income Taxes	'
Income Taxes	'
	Note 17—Income Taxes
	The components of income/(loss) from continuing operations before income taxes were as follows:
		Year Ended			Year Ended
		31-Mar-13			31-Mar-12
		(thousands)			(thousands)
	United States	$	(79,854	)	$	(63,566	)
	Total	$	(79,854	)	$	(63,566	)
	A summary of the components of the net deferred tax assets and liabilities as of March 31, 2013 and 2012 is as follows:
		Year Ended			Year Ended
		March 31, 2013			March 31, 2012
		(thousands)
	Current deferred tax assets
	Charitable contributions	$	3		$	—
	Accrued bonuses	170			—
	Accrued severance	138			—
	Accrued expenses	4			10
	Total current deferred tax assets	$	315		$	10
	Non-current deferred tax assets
	Investment in AWP	$	—		$	1,085
	Operating loss carry forward	20,493			3,321
	Start-up costs	100			107
	Stock compensation	7,247			3,505
	Warrant expense	2,161			—
	Mineral properties	52,625			—
	Exploration	5,892			—
	Total non-current deferred tax assets	$	88,518		$	8,018
	Valuation allowances	$	(88,505	)	$	(7,956	)
	Total deferred tax assets	$	328		$	72
	Current deferred tax liabilities
	Prepaid expenses	$	(226	)	$	(60	)
	Total current deferred tax liabilities	$	(226	)	$	(60	)
	Non-current deferred tax liabilities
	Fixed assets	(102		)	(12		)
	Total non-current deferred tax liabilities	$	(102	)	$	(12	)
	Total deferred tax liability	(328		)	(72		)
	Net deferred income tax assets (liabilities)	$	—		$	—
	Based upon the level of taxable income (loss) and projections of future taxable income (loss) over the periods in which the deferred tax assets are deductible, management believes it is more likely than not that the Company will not realize the benefits of these deductible differences, and thus has recorded a valuation allowance against the net deferred tax asset balance of $88.5 million. If we are profitable for a number of years and our prospects for the realization of our deferred tax assets are more likely than not, we will then reverse our valuation allowance and credit income tax expense.
	At March 31, 2013 the Company had $56.5 million of federal net operating loss carryforwards in the United States which expire at various dates through March 31, 2033. Valuation allowances have been recorded on net operating loss carryforwards where the Company believes it is more likely than not that the net operating loss will not be realized. The Company will monitor the need for a valuation allowance on an ongoing basis and will make the appropriate adjustments as necessary should circumstances change.
	The Company believes that there is no uncertainty for any income tax position. Therefore, the Company did not reserve an amount for unrecognized tax benefits. Tax years remaining subject to examination include the calendar years 2010 and 2011, the period January 1, 2012 to March 31, 2012 and the fiscal year ended March 31, 2013.
	The components of the consolidated income tax benefit (provision) from continuing operations were as follows:
		Year Ended			Year Ended
		March 31, 2013			March 31, 2012
		(thousands)			(thousands)
	Current portion of income tax expense (benefit)
	U.S. federal	$	—		$	—
	U.S. state	—			—
	Deferred portion of income tax expense (benefit)
	U.S. federal	—			—
	U.S. state	—			—
	Total income tax expense (benefit)	$	—		$	—
	A reconciliation of the actual income tax benefit (provision) and the tax computed by applying the U.S. federal rate (35%) to the loss before income taxes is as follows:
		Year Ended			Year Ended
		March 31, 2013			March 31, 2012
		(thousands)			(thousands)
	Tax benefit from continuing operations	$	(29,374	)	$	(2,214	)
	State tax benefit from continuing operations	(1,008		)	(63		)
	Non-deductible expenses	384			168
	Derivative expense	665			—
	Change in valuation allowance	80,549			1,765
	Non-controlling interest	1,475			247
	AWP step-up	(52,625		)	—
	Other	(66		)	(97		)
	Total income tax expense (benefit)	$	—		$	—

Subsequent_Events

Subsequent Events	12 Months Ended
	Mar. 31, 2013
Subsequent Events	'
Subsequent Events	'
	Note 18—Subsequent Events
	Debt Restructuring
	On April 15, 2013 and June 26, 2013 we entered into Extension Agreements with The Karlsson Group which restructured the senior first priority secured promissory note (the “Karlsson Note”) that we issued to The Karlsson Group on August 1, 2012 in connection with our purchase of Karlsson’s 50% interest in AWP (the “Initial KG Transaction”).  In connection with the First Extension Agreement, we amended some of the related documents, including the Karlsson Note (the “Karlsson Note Amendment”), and restructured the two promissory notes issued to affiliates of Apollo Global Management, LLC (“Apollo”) on March 7, 2013 in the aggregate principal amount of $6.8 million (the “Apollo Notes”).
	The First Karlsson Note Amendment requires us to make future tax “gross-up” payments to The Karlsson Group to compensate them for increases in federal and state income taxes and other tax related matters .We currently estimate the cost of these tax “gross-up” payments to be approximately $26.3 million ($20.1 million if you include the tax gross-up payments owing prior to the Amendment date); however, the tax gross-up payments are subject to change based on future changes in tax rates (including increases in effective income tax rates caused by “minimum tax” provisions such as the “Buffett rule” or “flat tax” proposals) and/or future changes in certain interest rates published by the Internal Revenue Service.
	Karlsson Note Amendments
	Under the First Karlsson Note Amendment, the maturity date was extended to the earlier of (i) 12 months following completion of a DFS and (ii) July 1, 2015.  An interim principal payment of $30.0 million is due on the earlier of (i) six months following completion of a DFS and (ii) January 2, 2015 (the “First Payment Date”). Prior to the First Karlsson Note Amendment, we were required to prepay the Karlsson Note with 40% of the net proceeds of any capital raised, whereas we are now required to prepay the Karlsson Note with 10% of the gross proceeds of any capital raised following the first $10.0 million of capital raised.  Under the First Karlsson Note Amendment, the annual interest rate of 9% changed from simple to compounding and is now payable quarterly in kind by automatically increasing the principal balance of the Karlsson Note.
	Under the First Karlsson Note Amendment, we are generally restricted from incurring debt other than Approved Subordinated Debt, which is defined as debt that (i) is unsecured, (ii) is subordinate to the Karlsson Note and (iii) may be convertible to equity if issued on or prior to September 10, 2013. We were also required to meet the following capital raising milestones: (i) $5.0 million by May 15, 2013, which was satisfied by the Very Hungry Parties’ $5.0 million subordinated loan (see below), (ii) an additional $7.0 million by June 17, 2013, of which all or any portion may be raised as Approved Subordinated Debt, (iii) an additional $18.0 million by September 10, 2013, of which all or any portion may be raised as Approved Subordinated Debt, and (iv) an additional $25.0 million no later than August 1, 2014, of which no more than $15.0 million may be raised as Approved Subordinated Debt. We were also required to deposit $9.2 million of the first $30.0 million of capital we raise into escrow, which funds may be released solely to fund specified development expenses for our potash project in the Holbrook Basin. Additionally, we were allowed to incur up to $10.0 million in additional Approved Subordinated Debt prior to the First Payment Date, but may incur no more than $1.0 million of debt after the First Payment Date.
	Prior to the First Karlsson Note Amendment, we had 15 days to cure a payment default and 30 days to cure any non-payment default after, in each case, receiving notice thereof. Under the First Karlsson Note Amendment, there are no notices or cure rights for any payment defaults or any defaults related to the financing milestones or escrow funding described above, or cross-defaults with other agreements. The majority of other non-monetary defaults now have a ten day notice and cure period.
	Under the First Karlsson Note Amendment, Karlsson may assign the Karlsson Note and any of the other Karlsson related documents following the earlier of (i) September 10, 2013, (ii) an event of default under the Karlsson Note, and (iii) once we have raised at least $30.0 million of capital.
	The First Extension Agreement contains customary lender releases and indemnification language.
	Consideration to Karlsson for First Extension Agreement
	In addition to changing the interest rate under the Karlsson Note from simple to compounding and payment of the tax gross-up amounts described above, as consideration to The Karlsson Group for entering into the First Extension Agreement and the related documents, we among other things, (i) increased The Karlsson Group’s royalty interest from 1% to 2% (Buffalo Management LLC has decreased its royalty interest from 2% to 1%  as described below) and eliminated the $75.0 million cap on The Karlsson Group’s previous 1% royalty interest, (ii) decreased the exercise price on The Karlsson Group’s warrants to purchase up to 112,117 shares of our common stock from $212.50 to $12.50 and allowed all of The Karlsson Group’s warrants to be exercisable on a cashless basis, (iii) provided Karlsson with an enhanced collateral package, including a parent guaranty from us and a pledge by us of 100% of the shares of our wholly owned subsidiary Prospect Global Resources Inc, a Delaware corporation and the owner of 100% of American West Potash LLC, (iv) extended the term of Karlsson’s right to receive 15% of the net proceeds from the sale of the Company by one year to August 1, 2017, and (v) agreed to pay Karlsson $275,000 for its attorneys’ fees and costs associated with consummation of the Extension Agreement and related agreements.
	Karlsson Second Extension Agreement
	On June 26, 2013, we entered into the Second Extension Agreement with The Karlsson Group which further restructured the Karlsson Note and related documents.
	Under this amendment, the interim principal payment of $30.0 million that was due on the earlier of (i) six months following completion of a definitive feasibility study and (ii) January 2, 2015 has been eliminated. We are also required to place 50% of the net proceeds of the next $24.0 million of capital we raise (for a total of $12.0 million) into escrow for Holbrook Project expenses. Two million dollars of the proceeds we received from our recent $5.0 million public offering (see below) were placed into this escrow, reducing our remaining escrow obligation to $10.0 million.
	We are also required to meet the following development milestones: (i) complete total depth on at least eight wells on or before November 1, 2013, (ii) deliver a completed and updated final NI 43-101 resource report on or before February 1, 2014, (iii) deliver completed metallurgical and rock mechanic test work results that will be used to complete the mine and processing plant designs for the definitive feasibility study on or before June 1, 2014 and (iv) deliver a completed and published definitive feasibility study on or before December 31, 2014.
	With this amendment, Karlsson may assign the Karlsson Note at any time to any person; previously it was assignable following the earlier of (i) September 10, 2013, (ii) an event of default under the Karlsson Note, and (iii) once we have raised at least $30.0 million of capital and there were restrictions on assignees. We also extended the term of Karlsson’s right to receive 15% of the net proceeds from the sale of the Company by six months to February 1, 2018.
	The Second Extension Agreement contains customary lender releases and indemnification language.
	Consideration to Karlsson for Second Extension Agreement
	With this amendment, we issued Karlsson a five year warrant to purchase 60,000 of our common shares at $6.00 per share and amended our registration rights agreement with Karlsson to include the shares issuable upon exercise of the new warrant. The warrant may be exercised on a cashless basis. We also reimbursed Karlsson $125,000 for its legal fees and expenses.
	Apollo Note Amendments
	Simultaneously with the execution of the First Extension Agreement and related documents, we agreed with Apollo to amend the Apollo Notes by extending the maturity dates from September 3, 2013 to the maturity date of the Karlsson Note (see above). The amendments also reduced our prepayment obligations from 33% of the net proceeds of any capital raised to 10% of the gross proceeds of any capital raised following our first $10.0 million of capital raised.
	Buffalo Management Royalty Amendment
	Simultaneously with the execution of the Extension Agreement and related documents, Buffalo Management agreed to a reduction in its royalty interest in us from 2% to 1%. In exchange for this reduction, we agreed to compensate Buffalo by giving Buffalo either, or a combination of, at its election, (i) equity securities (that may include common stock, preferred stock or warrants for common stock as mutually agreed) equal in value to the determined fair market value of the royalty surrendered or (ii) preferred stock that is redeemable after we commence receiving revenues from the Holbrook Project for the determined fair market value plus accrued interest; provided that no securities shall be issued to Buffalo prior to July 1, 2013 and provided further that in no event will any equity securities or securities convertible into equity securities issued to Buffalo (x) exceed 10% of our outstanding capital stock or (y) be redeemable for aggregate consideration exceeding 10% of our equity market capitalization. To value the surrendered royalty, we agreed to engage a third party valuation firm reasonably satisfactory to Buffalo. Buffalo is controlled by Chad Brownstein, our executive vice-chairman. Barry Munitz, our board chair owns a minority, non-voting interests in Buffalo. Our board has designated a committee composed of Ari Swiller and Conway Schatz to finalize these negotiations with Buffalo Management, neither of whom have any personal or economic interest in Buffalo.
	Nasdaq Notice of Listing Non-compliances
	On April 23, 2013, we received written notification from The Nasdaq Stock Market that for the last 30 consecutive business days, the bid price of our common stock had closed below the minimum $1.00 per share requirement for continued inclusion on the Nasdaq Capital Market based on Listing Rule 5550(a)(1).  We have 180 calendar days, or until September 20, 2013, to regain compliance with this rule. On April 25, 2013, we received a second written notification from The Nasdaq Stock Market that we are no longer in compliance with Nasdaq Listing Rule 5550(b)(2) because the market value of our listed securities has fallen below the $35 million minimum requirement for continued listing on the Nasdaq Capital Market for a period of at least 30 consecutive business days. We have 180 calendar days, or until September 22, 2013, to regain compliance. While we are considering available options to regain compliance with these Nasdaq rules, there can be no assurance that we will be able to do so, which would likely result in our common stock being delisted from the Nasdaq Capital Market. Delisting of our common stock from the Nasdaq Capital Market could substantially reduce the liquidity of your investment in our common stock.
	Receipt of $5.0 million Debt Financing
	On May 2, 2013 (and as further modified on May 22, 2013), we borrowed $5.0 million from two of our stockholders, Very Hungry LLC and Scott Reiman 1991 Trust (both related parties, see Note 12—Related Party Transactions for additional information) in exchange for $5.5 million in aggregate principal amounts of unsecured subordinated notes (“Bridge Loan Financing”). In consideration for this Bridge Loan Financing we reduced the exercise price on all warrants to purchase our common stock held by these parties to $15.00 per share (from exercise prices ranging from $212.50 per share to $150.00 per share) and extended the maturity of all these warrants to August 1, 2017. Very Hungry, LLC and the Scott Reiman 1991 Trust have agreed to invest their $5.5 million subordinated notes in convertible preferred stock that would be automatically convertible upon stockholder approval of the conversion into the same securities issued in the public offering that closed on June 26, 2013. If stockholder approval is not obtained, the subordinated promissory notes will mature on September 9, 2013.  The notes bear no interest.
	The gross proceeds from this Bridge Loan Financing satisfied the May 15, 2013 funding milestone previously required under The Karlsson Group debt (see above).
	Receipt of $5.0 million Public Offering
	On June 26, 2013, we closed a public offering of an aggregate of 833,334 units (the “Units”), consisting of 833,334 shares of the Company’s common stock, $0.001 par value (the “Common Stock”), together with (i) Series A warrants to purchase 833,334 additional shares of Common Stock (the “Series A Warrants”) and (ii) Series B warrants to purchase 833,334 additional shares of Common Stock and additional Series A Warrants to purchase 833,334 additional shares of Common Stock (the “Series B Warrants” and, together with the Series A Warrants, the “Warrants”), at a public offering price of $6.00 per Unit in an underwritten public offering (the “Offering”). The underwriter exercised its option to purchase up to an additional 23,464 warrant units consisting of one Series A Warrant and one Series B Warrant at an exercise price of $0.005 per unit, less underwriting commissions, solely to cover overallotments.
	The Series A Warrants were immediately exercisable on June 26, 2013 at an initial exercise price of $6.00 per share and expire on June 26, 2018. The Series B Warrants were exercisable immediately on June 26, 2013 at an exercise price of $6.00 per share. The Series B Warrants will expire at the close of business on November 1, 2013.
	The Series A Warrants and the Series B Warrants were issued separately from the Common Stock included in the Units and may be transferred separately immediately thereafter. Neither the Series A Warrants nor the Series B Warrants will be listed on any national securities exchange or other trading market, and no trading market for such Warrants is expected to develop.
	The Series A Warrants contain full ratchet anti-dilution protection upon the issuance of any Common Stock, securities convertible into Common Stock, or certain other issuances at a price below the then-existing exercise price of the Series A Warrants, subject to certain exceptions.

Restatement

Restatement	12 Months Ended
	Mar. 31, 2013
Restatement	'
Restatement	'
	Note 19—Restatement
	The Company made a determination following the completion of the Resource Report and PEA in late 2011 that it had met the requirements to transition from an exploration stage to a development stage company and accordingly began capitalizing all development related costs related to the Holbrook Project as of January 1, 2012. Prior to this date and while we were in the exploration stage, all costs related to the Holbrook Project were expensed as incurred.
	The Company has now determined that its capitalization of these development related costs was not fully in accordance with the U.S. GAAP and has amended and restated its March 31, 2012 and March 31, 2013 consolidated financial statements to expense certain costs previously capitalized in the balance sheet accounts for Mineral Properties and Deferred Fees. The net effect of these adjustments on the March 31, 2013 balance sheet was a reduction in the Mineral Properties account balance to $13.7 million from its previously reported balance of $40.0 million and the Deferred Fees account balance to nil from its previously reported balance of $7.8 million. With this restatement, we also reduced our previously reported expense for equity compensation related to unvested, forfeited stock options.  This resulted in a reduction of $0.6 million in our General and Administrative expenses for the year ended March 31, 2013 and nil for the year ended March 31, 2012.
	Additionally, we retroactively adjusted for the change in equity as a result of the 1-for-50 reverse stock split that occurred on September 4, 2013.
	The following tables reflect the adjustment and restated amounts:
	Consolidated Balance Sheet
		March 31, 2013
		As Reported		Adjustment		As Restated
		($000’s)		($000’s)		($000’s)
	ASSETS
	Mineral properties	39,994		(26,304	)	13,690
	Deferred fees	7,751		(7,751	)	—
	Total noncurrent assets	48,842		(34,055	)	14,787
	Total assets	51,062		(34,055	)	17,007
	SHAREHOLDER’S DEFICIT
	Common stock	73		(72	)	1
	Additional paid-in capital	35,641		(5,306	)	30,335
	Losses accumulated in exploration stage	(131,577	)	(28,677	)	(160,254	)
	Total shareholder’s deficit - Prospect Global Resources, Inc.	(95,863	)	(34,055	)	(129,918	)
	Total liabilities and shareholder’s deficit	51,062		(34,055	)	17,007
	Consolidated Statement of Operations
		Twelve months ended
		March 31, 2013
		As Reported		Adjustment		As Restated
		($000’s)		($000’s)		($000’s)
	Exploration	—		18,575		18,575
	General and administrative	42,737		5,721		48,458
	Off-take arrangement fee	—		7,751		7,751
	Total expenses	42,737		32,047		74,784
	Loss from operations	(42,737	)	(32,047	)	(74,784	)
	Net loss	(51,878	)	(32,047	)	(83,925	)
	Net loss attributable to non-controlling interest	12		4,059		4,071
	Net loss attributable to Prospect Global Resources, Inc.	(51,866	)	(27,988	)	(79,854	)
	Loss per share - basic and diluted	(44.91	)	(24.23	)	(69.14	)
	Consolidated Statement of Operations
		Inception through
		March 31, 2013
		As Reported		Adjustment		As Restated
		($000’s)		($000’s)		($000’s)
	Exploration	5,600		19,623		25,223
	General and Administrative	61,102		6,049		67,151
	Off-take arrangement fee	—		7,751		7,751
	Total expenses	66,702		33,423		100,125
	Loss from operations	(66,702	)	(33,423	)	(100,125	)
	Net loss	(134,668	)	(33,423	)	(168,091	)
	Net loss attributable to non-controlling interest	3,090		4,747		7,837
	Net loss attributable to Prospect Global Resources, Inc.	(131,578	)	(28,676	)	(160,254	)
	Loss per share - basic and diluted	(183.77	)	(40.05	)	(223.82	)
	Consolidated Statement of Cash Flows
		Twelve months ended
		March 31, 2013
		As Reported		Adjustment		As Restated
		($000’s)		($000’s)		($000’s)
	Operating activities:
	Net loss	(51,878	)	(32,047	)	(83,925	)
	Services paid for with securities	776		3,877		4,653
	Stock based compensation	13,794		2,445		16,239
	Deferred fees	(2,287	)	2,287		—
	Account payable	497		1,682		2,179
	Accrued liabilities	(915	)	4,578		3,663
	Net cash used in operating activities	(17,645	)	(17,178	)	(34,823	)
	Investing activities:
	Mineral properties	(18,777	)	17,178		(1,599	)
Net cash used in investing activities	(19,796	)	17,178		(2,618	)
Consolidated Statement of Cash Flows
	Inception through
	March 31, 2013
	As Reported		Adjustment		As Restated
	($000’s)		($000’s)		($000’s)
Operating activities:
Net loss	(134,668	)	(33,423	)	(168,091	)
Services paid for with securities	3,156		3,877		7,033
Stock based compensation	23,512		2,445		25,957
Deferred fees	(2,288	)	2,288		—
Accounts payable	1,169		1,681		2,850
Accrued liabilities	(531	)	5,049		4,518
Net cash used in operating activities	(29,360	)	(18,083	)	(47,443	)
Investing activities:
Mineral properties	(20,773	)	18,083		(2,690	)
Net cash used in investing activities	(21,879	)	18,083		(3,796	)
Consolidated Balance Sheet
	March 31, 2012
	As Reported		Adjustment		As Restated
	($000’s)		($000’s)		($000’s)
ASSETS
Mineral properties	13,468		(1,377	)	12,091
Total noncurrent assets	13,630		(1,377	)	12,253
Total assets	25,784		(1,377	)	24,407
SHAREHOLDER’S EQUITY
Common Stock	40		(40	)	—
Additional paid-in capital	91,957		40		91,997
Losses accumulated in exploration stage	(79,711	)	(688	)	(80,400	)
Total shareholder’s equity - Prospect Global Resources, Inc.	12,285		(688	)	11,597
Non-controlling interest	7,923		(689	)	7,234
Total shareholder’s equity	20,208		(1,377	)	18,831
Total liabilities and shareholder’s deficit	25,784		(1,377	)	24,407
Consolidated Statement of Operations
	Fiscal Year ending
	March 31, 2012
	As Reported		Adjustment		As Restated
	($000’s)		($000’s)		($000’s)
Exploration	4,954		1,048		6,002
General and administrative	16,877		329		17,206
Total expenses	21,831		1,377		23,208
Loss from operations	(21,831	)	(1,377	)	(23,208	)
Net loss	(65,580	)	(1,377	)	(66,957	)
Net loss attributable to non-controlling interest	2,702		689		3,391
Net loss attributable to Prospect Global Resources, Inc.	(62,878	)	(688	)	(63,566	)
Loss per share - basic and diluted	(112.28	)	(1.23	)	(113.51	)
Consolidated Statement of Operations
	Inception through
	March 31, 2012
	As Reported		Adjustment		As Restated
	($000’s)		($000’s)		($000’s)
Exploration	5,600		1,048		6,648
General and administrative	18,364		329		18,693
Total expenses	23,964		1,377		25,341
Loss from operations	(23,964	)	(1,377	)	(25,341	)
Net loss	(82,789	)	(1,377	)	(84,166	)
Net loss attributable to non-controlling interest	3,078		689		3,767
Net loss attributable to Prospect Global Resources, Inc.	(79,711	)	(688	)	(80,399	)
Loss per share - basic and diluted	(172.91	)	(1.49	)	(174.40	)
Consolidated Statement of Cash Flows
	Fiscal Year ended
	March 31, 2012
	As Reported		Adjustment		As Restated
	($000’s)		($000’s)		($000’s)
Operating Activities:
Net loss	(65,580	)	(1,377	)	(66,957	)
Accrued liabilities	299		471		770
Net cash used in operating activities	(10,443	)	(906	)	(11,349	)
Investing Activities:
Mineral Properties	(1,949	)	906		(1,043	)
Net cash used in investing activities	(2,030	)	906		(1,124	)
Consolidated Statement of Cash Flows
	Inception through
	March 31, 2012
	As Reported		Adjustment		As Restated
	($000’s)		($000’s)		($000’s)
Operating activities:
Net loss	(82,789	)	(1,377	)	(84,166	)
Accrued liabilities	386		471		857
Net cash used in operating activities	(11,712	)	(906	)	(12,618	)
Investing activities:
Mineral properties	(1,997	)	906		(1,091	)
Net cash used in investing activities	(2,086	)	906		(1,180	)
The Company has also restated the June 30, 2012, September 30, 2012 and December 31, 2012 interim consolidated financial statements to expense certain costs previously capitalized in the balance sheet accounts for Mineral Properties and Deferred Fees and to adjust for certain expenses related to unvested, forfeited stock options.  As a result, the interim consolidated statements of operations for the three month periods ended June 30, 2012, September 30, 2012 and December 31, 2012 were amended and restated to expense $6.5 million, $9.0 million and $14.7 million, respectively, of costs previously capitalized. The interim consolidated statement of operations for the six month period ended September 30, 2012 and the nine month periods ended December 31, 2012 were amended and restated to expense $15.5 million and $30.2 million(1), respectively, of costs previously capitalized.  Corresponding changes were made to the interim consolidated statement of operations and the interim consolidated statements of cash flows for the periods from inception and the interim consolidated statements of cash flows for the three months ended June 30, 2012, the six months ended September 30, 2012, and the nine months ended December 31, 2012.
(1) $29.8 million net of the $0.4 million reduction in General and Administrative expenses for unvested, forfeited stock options for the nine months ended December 31, 2012.
The details of these restatements are outlined in the tables below.  The per share amounts in these tables have been adjusted for the 1 for 50 reverse stock split that occurred on September 4, 2013.
Consolidated Balance Sheet
	June 30, 2012
	As Reported		Adjustment		As Restated
	($000’s)		($000’s)		($000’s)
ASSETS
Mineral properties	20,067		(7,877	)	12,190
Total noncurrent assets	20,371		(7,877	)	12,494
Total assets	22,071		(7,877	)	14,194
SHAREHOLDER’S EQUITY
Common stock	39		(39	)	—
Additional paid-in capital	86,719		39		86,758
Losses accumulated in exploration stage	(83,032	)	(3,939	)	(86,971	)
Total shareholder’s equity - Prospect Global Resources, Inc.	4,727		(3,938	)	789
Non-controlling interest	7,915		(3,939	)	3,976
Total shareholder’s equity	12,642		(7,877	)	4,765
Total liabilities and shareholder’s equity	22,071		(7,877	)	14,194
Consolidated Statement of Operations
	Three months ended
	June 30, 2012
	As Reported		Adjustment		As Restated
	($000’s)		($000’s)		($000’s)
Exploration	—		5,568		5,568
General and administrative	3,328		932		4,260
Total expenses	3,328		6,500		9,828
Loss from operations	(3,328	)	(6,500	)	(9,828	)
Net loss	(3,328	)	(6,500	)	(9,828	)
Net loss attributable to non-controlling interest	7		3,250		3,257
Net loss attributable to Prospect Global Resources, Inc.	(3,321	)	(3,250	)	(6,571	)
Loss per share - basic and diluted	(4.20	)	(4.12	)	(8.32	)
Consolidated Statement of Operations
	Inception through June
	30, 2012
	As Reported		Adjustment		As Restated
	($000’s)		($000’s)		($000’s)
Exploration	5,600		6,616		12,216
General and administrative	21,692		1,261		22,953
Total expenses	27,292		7,877		35,169
Loss from operations	(27,292	)	(7,877	)	(35,169	)
Net loss	(86,117	)	(7,877	)	(93,994	)
Net loss attributable to non-controlling interest	3,085		3,939		7,024
Net loss attributable to Prospect Global Resources, Inc.	(83,032	)	(3,938	)	(86,970	)
Loss per share - basic and diluted	(164.42	)	(7.80	)	(172.22	)
Consolidated Statement of Cash Flows
	Three months ended
	June 30, 2012
	As Reported		Adjustment		As Restated
	($000’s)		($000’s)		($000’s)
Operating activities:
Net loss	(3,328	)	(6,500	)	(9,828	)
Accounts payable	434		1,722		2,156
Accrued liabilities	258		1,088		1,346
Net cash used in operating activities	(2,079	)	(3,690	)	(5,769	)
Investing activities:
Mineral properties	(3,788	)	3,690		(98	)
Net cash used in investing activities	(8,937	)	3,690		(5,247	)
Consolidated Statement of Cash Flows
	Inception through June
	30, 2012
	As Reported		Adjustment		As Restated
	($000’s)		($000’s)		($000’s)
Operating activities:
Net loss	(86,117	)	(7,877	)	(93,994	)
Accounts payable	1,106		1,723		2,829
Accrued liabilities	644		1,559		2,203
Net cash used in operating activities	(13,292	)	(4,595	)	(17,887	)
Investing activities:
Mineral properties	(5,784	)	4,595		(1,189	)
Net cash used in investing activities	(11,523	)	4,595		(6,928	)
Consolidated Balance Sheet
	September 30, 2012
	As Reported		Adjustment		As Restated
	($000’s)		($000’s)		($000’s)
ASSETS
Mineral properties	29,036		(16,846	)	12,190
Total noncurrent assets	29,638		(16,846	)	12,792
Total assets	41,604		(16,846	)	24,758
SHAREHOLDER’S DEFICIT
Common stock	55		(55	)	—
Additional paid-in capital	1,275		(4,691	)	(3,416	)
Losses accumulated in exploration stage	(96,977	)	(12,100	)	(109,077	)
Total shareholder’s (deficit) - Prospect Global Resources, Inc.	(95,646	)	(16,846	)	(112,492	)
Total shareholder’s (deficit)	(95,646	)	(16,846	)	(112,492	)
Total liabilities and shareholder’s deficit (deficit)	41,604		(16,846	)	24,758
Consolidated Statement of Operations
	Three months ended
	September 30, 2012
	As Reported		Adjustment		As Restated
	($000’s)		($000’s)		($000’s)
Exploration	—		5,802		5,802
General and administrative	12,080		3,167		15,247
Total expenses	12,080		8,969		21,049
Loss from operations	(12,080	)	(8,969	)	(21,049	)
Net loss	(13,951	)	(8,969	)	(22,920	)
Net loss attributable to non-controlling interest	6		807		813
Net loss attributable to Prospect Global Resources, Inc.	(13,945	)	(8,162	)	(22,107	)
Loss per share - basic and diluted	(12.75	)	(7.46	)	(20.21	)
Consolidated Statement of Operations
	Six Months ended
	September 30, 2012
	As Reported		Adjustment		As Restated
	($000’s)		($000’s)		($000’s)
Exploration	—		11,370		11,370
General and administrative	15,408		4,099		19,507
Total expenses	15,408		15,469		30,877
Loss from operations	(15,408	)	(15,469	)	(30,877	)
Net loss	(17,279	)	(15,469	)	(32,748	)
Net loss attributable to non-controlling interest	13		4,057		4,070
Net loss attributable to Prospect Global Resources, Inc.	(17,266	)	(11,412	)	(28,678	)
Loss per share - basic and diluted	(18.31	)	(12.10	)	(30.41	)
Consolidated Statement of Operations
	Inception through
	September 30, 2012
	As Reported		Adjustment		As Restated
	($000’s)		($000’s)		($000’s)
Exploration	5,600		12,418		18,018
General and administrative	33,771		4,428		38,199
Total expenses	39,371		16,846		56,217
Loss from operations	(39,371	)	(16,846	)	(56,217	)
Net loss	(100,068	)	(16,846	)	(116,914	)
Net loss attributable to non-controlling interest	3,091		4,746		7,837
Net loss attributable to Prospect Global Resources, Inc.	(96,977	)	(12,100	)	(109,077	)
Loss per share - basic and diluted	(168.66	)	(21.04	)	(189.70	)
Consolidated Statement of Cash Flows
	Six months ended
	September 30, 2012
	As Reported		Adjustment		As Restated
	($000’s)		($000’s)		($000’s)
Operating activities
Net loss	(17,279	)	(15,469	)	(32,748	)
Stock based compensation	8,228		2,454		10,682
Account payable	(249	)	2,348		2,099
Accrued liabilities	980		1,680		2,660
Net cash used in operating activities	(5,719	)	(8,987	)	(14,706	)
Investing activities
Mineral properties	(9,085	)	8,987		(98	)
Net cash used in investing activities	(9,481	)	8,987		(494	)
Consolidated Statement of Cash Flows
	Inception through
	September 30, 2012
	As Reported		Adjustment		As Restated
	($000’s)		($000’s)		($000’s)
Operating Activities:
Net loss	(100,068	)	(16,846	)	(116,914	)
Stock based compensation	17,946		2,454		20,400
Account payable	423		2,348		2,771
Accrued liabilities	1,365		2,151		3,516
Net cash used in operating activities	(17,430	)	(9,893	)	(27,323	)
Investing Activities:
Mineral Properties	(11,082	)	9,893		(1,189	)
Net cash used in investing activities	(11,567	)	9,893		(1,674	)
Consolidated Balance Sheet
	December 31, 2012
	As Reported		Adjustment		As Restated
	($000’s)		($000’s)		($000’s)
ASSETS
Mineral properties	35,991		(23,801	)	12,190
Deferred fees	7,751		(7,751	)	—
Total noncurrent assets	44,517		(31,554	)	12,963
Total assets	55,304		(31,554	)	23,750
SHAREHOLDER’S DEFICIT
Common stock	73		(72	)	1
Additional paid-in capital	34,265		(5,046	)	29,219
Losses accumulated in exploration stage	(116,727	)	(26,436	)	(143,163	)
Total shareholder’s deficit - Prospect Global Resources, Inc.	(82,390	)	(31,554	)	(113,944	)
Non-controlling interest	—		—		—
Total shareholder’s deficit	(82,390	)	(31,554	)	(113,944	)
Total liabilities and shareholder’s deficit	55,304		(31,554	)	23,750
Consolidated Statement of Operations
	Three months ended
	December 31, 2012
	As Reported		Adjustment		As Restated
	($000’s)		($000’s)		($000’s)
Exploration	—		5,646		5,646
General and administrative	15,110		937		16,047
Off-take arrangement fee	—		7,751		7,751
Total expenses	15,110		14,334		29,444
Loss from operations	(15,110	)	(14,334	)	(29,444	)
Net loss	(19,751	)	(14,334	)	(34,085	)
Net loss attributable to non-controlling interest	—		—		—
Net loss attributable to Prospect Global Resources, Inc.	(19,751	)	(14,334	)	(34,085	)
Loss per share - basic and diluted	(15.36	)	(11.14	)	(26.50	)
Consolidated Statement of Operations
	Nine Months ended
	December 31, 2012
	As Reported		Adjustment		As Restated
	($000’s)		($000’s)		($000’s)
Exploration	—		17,016		17,016
General and administrative	30,518		5,036		35,554
Off-take arrangement fee	—		7,751		7,751
Total expenses	30,518		29,803		60,321
Loss from operations	(30,518	)	(29,803	)	(60,321	)
Net loss	(37,030	)	(29,803	)	(66,833	)
Net loss attributable to non-controlling interest	12		4,057		4,069
Net loss attributable to Prospect Global Resources, Inc.	(37,018	)	(25,746	)	(62,764	)
Loss per share - basic and diluted	(34.99	)	(24.33	)	(59.32	)
Consolidated Statement of Operations
	Inception through
	December 31, 2012
	As Reported		Adjustment		As Restated
	($000’s)		($000’s)		($000’s)
Exploration	5,600		18,064		23,664
General and administrative	48,881		5,365		54,246
Off-take arrangement fee	—		7,751		7,751
Total expenses	54,481		31,180		85,661
Loss from operations	(54,481	)	(31,180	)	(85,661	)
Net loss	(119,819	)	(31,180	)	(150,999	)
Net loss attributable to non-controlling interest	3,091		4,746		7,837
Net loss attributable to Prospect Global Resources, Inc.	(116,728	)	(23,434	)	(140,162	)
Loss per share - basic and diluted	(182.10	)	(36.56	)	(218.66	)
Consolidated Statement of Cash Flows
	Nine months ended
	December 31, 2012
	As Reported		Adjustment		As Restated
	($000’s)		($000’s)		($000’s)
Operating activities:
Net loss	(37,030	)	(29,803	)	(66,833	)
Services paid for with securities	672		3,875		4,547
Stock based compensation	12,649		2,578		15,227
Deferred fees	(1,938	)	1,938		—
Accounts payable	(1,773	)	3,191		1,418
Accrued liabilities	1,781		2,780		4,561
Net cash used in operating activities	(12,650	)	(15,441	)	(28,091	)
Investing activities:
Mineral properties	(15,539	)	15,441		(98	)
Net cash used in investing activities	(16,181	)	15,441		(740	)
Consolidated Statement of Cash Flows
	Inception through
	December 31, 2012
	As Reported		Adjustment		As Restated
	($000’s)		($000’s)		($000’s)
Operating activities
Net loss	(119,819	)	(31,180	)	(150,999	)
Services paid for with securities	3,052		3,876		6,928
Stock based compensation	22,367		2,578		24,945
Deferred fees	(1,938	)	1,938		—
Accounts payable	(1,101	)	3,191		2,090
Accrued liabilities	2,165		3,252		5,417
Net cash used in operating activities	(24,363	)	(16,345	)	(40,708	)
Investing activities
Mineral properties	(17,535	)	16,345		(1,190	)
Net cash used in investing activities	(18,266	)	16,345		(1,921	)

Summary_of_Significant_Account1

Summary of Significant Accounting Principles (Policies)	12 Months Ended
	Mar. 31, 2013
Summary of Significant Accounting Principles	'
Basis of Presentation	'
	Basis of Presentation
	The accompanying consolidated financial statements of the Company have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”), the instructions to Form 10-K and applicable Articles of Regulation S-X. In the opinion of management, all of the normal and recurring adjustments necessary to fairly present the financial information set forth herein have been included.
Principles of Consolidation	'
	Principles of Consolidation
	As of March 31, 2013, the Company was the 100% owner of Prospect Global Resources Inc., a Delaware corporation (“old Prospect Global”).  Old Prospect Global is a holding company and the 100% owner of AWP; and, therefore, the Company accordingly provides the consolidated financial statements for the Company, old Prospect Global and AWP.  The purpose of consolidated financial statements is to present the results of operations and the financial position of the Company and its subsidiaries as if the group were a single company. The Company has disclosed in the financial statements the amount of non-controlling interest attributable to The Karlsson Group (prior to the August 1, 2012 acquisition of the remaining 50% non-controlling interest) and has eliminated all intercompany gains and losses. All intercompany accounts and transactions have been eliminated in the consolidation.
Exploration Stage	'
	Exploration Stage
	As of March 31, 2013, the Company was considered an exploration stage enterprise since none of the Company’s mineral properties had proven or probable reserves as determined under the requirements of SEC Industry Guide No. 7. Further analysis, including additional in-fill drilling and a definitive feasibility study, is required before any portion of the resource, if any, can potentially be upgraded to a proven or probable reserve status pursuant to SEC Industry Guide 7.
Use of Estimates	'
	Use of Estimates
	The preparation of the Company’s consolidated financial statements requires management to make judgments, estimates and assumptions that affect the reported amounts of assets and liabilities and the related disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of expenses incurred during the reporting period. The Company bases its estimates on various assumptions that are believed to be reasonable under the circumstances. Accordingly, actual results may differ significantly from these estimates under different assumptions or conditions. Significant estimates with regard to the Company’s consolidated financial statements include the fair value of mineral interests contributed by The Karlsson Group; the calculation of certain conversion features of the Company’s secured convertible notes; the embedded derivative liabilities associated with those secured convertible notes and the outstanding warrants issued by the Company (and the associated changes period to period); stock-based compensation; the liability associated with the Grandhaven Option; the fair market value of consideration associated with The Karlsson Group Acquisition and the Karlsson Note Tax Gross-Up (as defined in Note 8—Debt) amount.
Cash and Cash Equivalents	'
	Cash and Cash Equivalents
	Cash is comprised of cash deposits held at banks.  Cash equivalents are highly liquid investments with original maturities of three months or less.  As of March 31, 2013 and 2012, the Company had no cash equivalents. During the course of our operations, our balance of cash and cash equivalents held in bank accounts may exceed amounts covered by the Federal Deposit Insurance Corporation (FDIC).
Equipment	'
	Equipment
	Equipment is recorded at cost. Depreciation is calculated on the straight-line method over the estimated useful life of the assets. Estimated useful lives of assets currently held range from 2-10 years. The Company’s policy is to review equipment for impairment at least annually.
Mineral Properties	'
	Mineral Properties
	The Company is primarily engaged in the acquisition, exploration and exploitation of mineral properties with the objective of extracting minerals from these properties. Mineral property exploration costs are expensed as incurred. Costs for acquired mineral property are capitalized and then impaired if the criteria for capitalization are not met. Capitalization of mine development costs that meet the definition of an asset will commence once we have proven and probable reserves in accordance with SEC Industry Guide 7.
	In the event that a mineral property is acquired through the issuance of the Company’s shares, the mineral property is recorded at the fair value of the respective property or the fair value of common shares and other instruments issued, whichever is more readily determinable. When mineral properties are acquired under option agreements with future acquisition payments to be made at the sole discretion of the Company, those future payments, whether in cash, shares, or other instruments are recorded only when the Company has made or is obliged to make the payment or issue the shares or instruments.
Exploration Expense	'
	Exploration Expense
	Exploration expense includes geological and geophysical work performed on areas that do not yet have identified resources. These costs are expensed as incurred.
Financial Instruments	'
	Financial Instruments
	Prospect’s financial instruments consist of cash and cash equivalents, accounts receivable, notes payable, accounts payable, accrued liabilities, warrants and stock options. We carry cash and cash equivalents, accounts receivable, accounts payable, accrued liabilities and notes payable at historical costs; their respective estimated fair values approximate carrying values due to their current nature.
	We do not use derivative financial instruments to hedge exposures to cash flow, market or foreign-currency risks. However, we have in the past entered into certain financial instruments and contracts, such as convertible note financing arrangements and the Karlsson Note that contained embedded derivative features. The convertible note financing arrangements were carried as derivative liabilities, at fair value, in our financial statements until their conversion into common stock on November 22, 2011.
Income Taxes	'
	Income Taxes
	The Company accounts for income taxes using the asset and liability method of accounting for deferred income taxes. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of assets and liabilities and their respective tax bases.
	A valuation allowance is required to the extent it is more-likely-than-not that a deferred tax asset will not be realized. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in operations in the period that includes the enactment date.
	The Company also reports taxes based on tax positions that meet a more-likely-than-not standard and that are measured at the amount that is more-likely-than-not to be realized. Differences between financial and tax reporting which do not meet this threshold are required to be recorded as unrecognized tax benefits. The Company classifies penalty and interest expense related to income tax liabilities as an income tax expense. There are no penalties or interest recognized in the statement of operations or accrued on the balance sheet.
Loss per Share	'
	Loss per Share
	Basic loss per share of common stock is calculated by dividing net loss available to common stockholders by the weighted average number of common shares outstanding for the respective period. Diluted loss per common share reflects the potential dilution that would occur if contracts to issue common stock were exercised or converted into common stock. For the 12 months ended March 31, 2013 and 2012 and from August 5, 2010 (Inception) to March 31, 2013, basic loss per common share and diluted loss per common share were the same as any potentially dilutive shares would have been anti-dilutive to the periods. Refer to Note 15—Loss per Share for additional information.
Equity-Based Compensation	'
	Equity-Based Compensation
	The Company recognizes compensation costs for share-based awards based on the estimated fair value of the employee awards on their grant date. The fair value of stock options is estimated using the Black-Scholes option pricing model. Compensation costs are recognized on a straight-line basis over each issuance’s respective vesting period.
	From time to time, the Company will issue share-based awards, including options and warrants, to non-employees. The fair value of these awards issued to non-employees (typically consultants) is measured on the earlier of the date the performance is complete or the date the consultant is committed to perform. In the event that the measurement date occurs after an interim reporting date, the awards are measured at their then-current fair value at each interim reporting date, estimated using the Black-Scholes pricing model. The fair value of these awards is expensed on a straight-line basis over the associated performance period.
Warrants	'
	Warrants
	The Company classifies its issued and outstanding warrants as liabilities or equity in its financial statements, depending upon the criteria met and specific circumstances at a given point in time. Refer to Note 13—Equity Based Compensation and Note 14—Shareholders’ Equity for additional information.
Recent Accounting Pronouncements	'
	Recent Accounting Pronouncements
	The Company has considered recently issued accounting pronouncements and does not believe that such pronouncements are of significance, or potential significance, to the Company.

Other_Current_Assets_Tables

Other Current Assets (Tables)	12 Months Ended
	Mar. 31, 2013
Other Current Assets	'
Schedule of other current assets	'
		March 31, 2013		March 31, 2012
		(thousands)		(thousands)
	Prepaid insurance & rent	$	276	$	223
	Other	389		605
	SK Land Holdings Option	500		—
	Total other current assets	$	1,165	$	828

Accounts_Payable_and_Accrued_L1

Accounts Payable and Accrued Liabilities (Tables)	12 Months Ended
	Mar. 31, 2013
Accounts Payable and Accrued Liabilities	'
Schedule of accrued liabilities	'
		March 31, 2013		March 31, 2012
		(thousands)		(thousands)
	Drilling/permitting	$	140	$	471
	Mineral lease obligations	1,500		—
	Legal	112		280
	Vacation, bonuses and severance pay	982		27
	Board of Directors’ fees	125		—
	Off-take arrangement fee	1,588		—
	Interest on promissory notes	7,229		—
	Other	82		66
	Total accrued liabilities	$	11,758	$	844

Debt_Tables

Debt (Tables)	12 Months Ended
	Mar. 31, 2013
Debt	'
Schedule of company's debt	'
		March 31, 2013			March 31, 2012
		(thousands)			(thousands)
	Karlsson senior secured note	$	115,282		$	—
	Apollo unsecured notes	6,750			—
	Tax gross-up on Karlsson senior secured note	6,226			—
	Total debt	128,258			—
	Less: current portion	(128,258		)	—
	Total long-term debt	$	—		$	—

Convertible_Notes_Tables

Convertible Notes (Tables)	12 Months Ended
	Mar. 31, 2013
Convertible Notes	'
Schedule of notes outstanding prior to their conversion	'
	Secured Convertible Notes
	$2.0 million face value secured convertible note due January 24, 2012
	$0.5 million face value secured convertible note due January 24, 2012
	$2.5 million face value secured convertible note due April 24, 2012
	$1.5 million face value secured convertible note due August 3, 2012
	$1.5 million face value secured convertible note due September 18, 2012
Schedule of allocation of the proceeds from the convertible notes on the financing dates	'
	Secured Convertible Notes	Merkin Note			COR Note			Hexagon Note			Avalon Note			Second
		$2.0 million			$0.5 million			$2.5 million			$1.5 million			Hexagon Note
		Face Value			Face Value			Face Value			Face Value			$1.5 million
														Face Value
		(thousands)			(thousands)			(thousands)			(thousands)			(thousands)
	Proceeds	$	(2,000	)	$	(500	)	$	(2,500	)	$	(1,500	)	$	(1,500	)
	Compound embedded derivative	10,068			333			460			708			432
	Warrant derivative liability	—			—			3,954			5,147			2,135
	Day-one derivative loss	(8,068		)	—			(1,914		)	(4,355		)	(1,067		)
	Carrying value	$	—		$	(167	)	$	—		$	—		$	—

Derivative_Financial_Instrumen1

Derivative Financial Instruments (Tables)	12 Months Ended
	Mar. 31, 2013
Derivative Financial Instruments	'
Summary of the effects on gain (loss) associated with changes in the fair values of derivative financial instruments by type of financing	'
	Our financings giving rise to derivative financial instruments and the income effects:	Year Ended
		March 31, 2012
		(thousands)
	Compound embedded derivatives	$	(23,525	)
	Day-one derivative loss	(7,336		)
	Warrant derivative liabilities	(8,949		)
	Total derivative loss	$	(39,810	)
Reconciliation of changes in the fair value of financial liabilities	'
		Derivative Financial Information
		2013			2012
		(thousands)			(thousands)
	Beginning balance as of period ended March 31	$	—		$	(17,288	)
	Total gains or losses (realized or unrealized):
	Included in earnings	—			(20,956		)
	Warrant issuances	—			(12,396		)
	Warrant reclassification to equity	—			20,228
	Debenture issuances	—			(12,001		)
	Debenture conversions	—			42,413
	Ending balance as of March 31	—			—

Equity_Based_Compensation_Tabl

Equity Based Compensation (Tables)	12 Months Ended
	Mar. 31, 2013
Equity Based Compensation	'
Summary of stock option activity under the Plans	'
	Stock Options	Shares (000)		Weighted-		Aggregate		Weighted-
				Average		Intrinsic		Average
				Exercise		Value ($000)		Remaining
				Price				Term (Years)
	Outstanding at March 31, 2012	68		$	212.5	$	19,636	7.69
	Granted	127		130.66		—		9.01
	Exercised	—		—		—		—
	Forfeited or expired	(9	)	130		—		—
	Outstanding at March 31, 2013	186		160.71		—		9.02
	Vested at March 31, 2013	132		171.67		—		8.87
Summary of status of the non-vested stock options	'
	Non-vested Stock Options	Shares (000)		Weighted Average
				Grant Date
				Fair Value
	Non-vested at March 31, 2012	20		$	123.48
	Granted	127		95.24
	Vested	(84	)	96.24
	Forfeited	(9	)	123.1
	Non-vested at March 31, 2013	54		99.63
Stock Options	'
Equity Based Compensation	'
Schedule of assumptions used in estimating the fair value of awards granted	'
	Expected term	5.0 to 9.47 years
	Volatility*	128.57% to 181.46%*
	Risk-free rate	0.63% to 2.00%
	Dividend yield	—
	*       The Company’s estimates of expected volatility are based on the historic volatility of the Company’s common stock as well as the historic volatility of the Company’s peers due to the limited availability of historical trading information on the Company itself.
Warrants Issued for Services	'
Equity Based Compensation	'
Schedule of assumptions used in estimating the fair value of awards granted	'
	Expected term	2.0 to 5.0 years
	Volatility*	106.22% to 177.26%*
	Risk-free rate	0.22% to 1.52%
	Dividend yield	—
	*          The Company’s estimates of expected volatility are based on the historic volatility of the Company’s common stock as well as the historic volatility of the Company’s peers due to the limited availability of historical trading information on the Company itself.

Loss_per_Share_Tables

Loss per Share (Tables)	12 Months Ended
	Mar. 31, 2013
Loss per Share	'
Computation of basic and fully diluted weighted average shares outstanding and loss per share of common stock	'
		Year Ended			Year Ended			Cumulative from
		March 31,			March 31,			August 5, 2010
		2013			2012			(Inception)
								through March
								31, 2013
		(thousands, except per share amounts)
	Net loss attributable to Prospect Global Resources Inc.	$	(79,854	)	$	(63,566	)	$	(160,254	)
	Weighted average number of common shares outstanding — basic	1,155			560			716
	Dilution effect of restricted stock and warrants	—			—			—
	Weighted average number of common shares outstanding — fully diluted	1,155			560			716
	Loss per share of common stock:
	Basic and fully diluted loss per share of common stock	$	(69.14	)	$	(113.51	)	$	(223.82	)

Income_Taxes_Tables

Income Taxes (Tables)	12 Months Ended
	Mar. 31, 2013
Income Taxes	'
Schedule of components of income/(loss) from continuing operations before income taxes	'
		Year Ended			Year Ended
		31-Mar-13			31-Mar-12
		(thousands)			(thousands)
	United States	$	(79,854	)	$	(63,566	)
	Total	$	(79,854	)	$	(63,566	)
Summary of the components of the net deferred tax assets and liabilities	'
		Year Ended			Year Ended
		March 31, 2013			March 31, 2012
		(thousands)
	Current deferred tax assets
	Charitable contributions	$	3		$	—
	Accrued bonuses	170			—
	Accrued severance	138			—
	Accrued expenses	4			10
	Total current deferred tax assets	$	315		$	10
	Non-current deferred tax assets
	Investment in AWP	$	—		$	1,085
	Operating loss carry forward	20,493			3,321
	Start-up costs	100			107
	Stock compensation	7,247			3,505
	Warrant expense	2,161			—
	Mineral properties	52,625			—
	Exploration	5,892			—
	Total non-current deferred tax assets	$	88,518		$	8,018
	Valuation allowances	$	(88,505	)	$	(7,956	)
	Total deferred tax assets	$	328		$	72
	Current deferred tax liabilities
	Prepaid expenses	$	(226	)	$	(60	)
	Total current deferred tax liabilities	$	(226	)	$	(60	)
	Non-current deferred tax liabilities
	Fixed assets	(102		)	(12		)
	Total non-current deferred tax liabilities	$	(102	)	$	(12	)
	Total deferred tax liability	(328		)	(72		)
	Net deferred income tax assets (liabilities)	$	—		$	—
Schedule of components of the consolidated income tax benefit (provision) from continuing operations	'
		Year Ended			Year Ended
		March 31, 2013			March 31, 2012
		(thousands)			(thousands)
	Current portion of income tax expense (benefit)
	U.S. federal	$	—		$	—
	U.S. state	—			—
	Deferred portion of income tax expense (benefit)
	U.S. federal	—			—
	U.S. state	—			—
	Total income tax expense (benefit)	$	—		$	—
Schedule of reconciliation of the actual income tax benefit (provision) and the tax computed by applying the U.S. federal rate	'
		Year Ended			Year Ended
		March 31, 2013			March 31, 2012
		(thousands)			(thousands)
	Tax benefit from continuing operations	$	(29,374	)	$	(2,214	)
	State tax benefit from continuing operations	(1,008		)	(63		)
	Non-deductible expenses	384			168
	Derivative expense	665			—
	Change in valuation allowance	80,549			1,765
	Non-controlling interest	1,475			247
	AWP step-up	(52,625		)	—
	Other	(66		)	(97		)
	Total income tax expense (benefit)	$	—		$	—

Restatement_Tables

Restatement (Tables)	12 Months Ended
	Mar. 31, 2013
Restatement	'
Schedule of adjustment and restated amounts	'
	Consolidated Balance Sheet
		March 31, 2013
		As Reported		Adjustment		As Restated
		($000’s)		($000’s)		($000’s)
	ASSETS
	Mineral properties	39,994		(26,304	)	13,690
	Deferred fees	7,751		(7,751	)	—
	Total noncurrent assets	48,842		(34,055	)	14,787
	Total assets	51,062		(34,055	)	17,007
	SHAREHOLDER’S DEFICIT
	Common stock	73		(72	)	1
	Additional paid-in capital	35,641		(5,306	)	30,335
	Losses accumulated in exploration stage	(131,577	)	(28,677	)	(160,254	)
	Total shareholder’s deficit - Prospect Global Resources, Inc.	(95,863	)	(34,055	)	(129,918	)
	Total liabilities and shareholder’s deficit	51,062		(34,055	)	17,007
	Consolidated Statement of Operations
		Twelve months ended
		March 31, 2013
		As Reported		Adjustment		As Restated
		($000’s)		($000’s)		($000’s)
	Exploration	—		18,575		18,575
	General and administrative	42,737		5,721		48,458
	Off-take arrangement fee	—		7,751		7,751
	Total expenses	42,737		32,047		74,784
	Loss from operations	(42,737	)	(32,047	)	(74,784	)
	Net loss	(51,878	)	(32,047	)	(83,925	)
	Net loss attributable to non-controlling interest	12		4,059		4,071
	Net loss attributable to Prospect Global Resources, Inc.	(51,866	)	(27,988	)	(79,854	)
	Loss per share - basic and diluted	(44.91	)	(24.23	)	(69.14	)
	Consolidated Statement of Operations
		Inception through
		March 31, 2013
		As Reported		Adjustment		As Restated
		($000’s)		($000’s)		($000’s)
	Exploration	5,600		19,623		25,223
	General and Administrative	61,102		6,049		67,151
	Off-take arrangement fee	—		7,751		7,751
	Total expenses	66,702		33,423		100,125
	Loss from operations	(66,702	)	(33,423	)	(100,125	)
	Net loss	(134,668	)	(33,423	)	(168,091	)
	Net loss attributable to non-controlling interest	3,090		4,747		7,837
	Net loss attributable to Prospect Global Resources, Inc.	(131,578	)	(28,676	)	(160,254	)
	Loss per share - basic and diluted	(183.77	)	(40.05	)	(223.82	)
	Consolidated Statement of Cash Flows
		Twelve months ended
		March 31, 2013
		As Reported		Adjustment		As Restated
		($000’s)		($000’s)		($000’s)
	Operating activities:
	Net loss	(51,878	)	(32,047	)	(83,925	)
	Services paid for with securities	776		3,877		4,653
	Stock based compensation	13,794		2,445		16,239
	Deferred fees	(2,287	)	2,287		—
	Account payable	497		1,682		2,179
	Accrued liabilities	(915	)	4,578		3,663
	Net cash used in operating activities	(17,645	)	(17,178	)	(34,823	)
	Investing activities:
	Mineral properties	(18,777	)	17,178		(1,599	)
	Net cash used in investing activities	(19,796	)	17,178		(2,618	)
	Consolidated Statement of Cash Flows
		Inception through
		March 31, 2013
		As Reported		Adjustment		As Restated
($000’s)		($000’s)		($000’s)
Operating activities:
Net loss	(134,668	)	(33,423	)	(168,091	)
Services paid for with securities	3,156		3,877		7,033
Stock based compensation	23,512		2,445		25,957
Deferred fees	(2,288	)	2,288		—
Accounts payable	1,169		1,681		2,850
Accrued liabilities	(531	)	5,049		4,518
Net cash used in operating activities	(29,360	)	(18,083	)	(47,443	)
Investing activities:
Mineral properties	(20,773	)	18,083		(2,690	)
Net cash used in investing activities	(21,879	)	18,083		(3,796	)
Consolidated Balance Sheet
	March 31, 2012
	As Reported		Adjustment		As Restated
	($000’s)		($000’s)		($000’s)
ASSETS
Mineral properties	13,468		(1,377	)	12,091
Total noncurrent assets	13,630		(1,377	)	12,253
Total assets	25,784		(1,377	)	24,407
SHAREHOLDER’S EQUITY
Common Stock	40		(40	)	—
Additional paid-in capital	91,957		40		91,997
Losses accumulated in exploration stage	(79,711	)	(688	)	(80,400	)
Total shareholder’s equity - Prospect Global Resources, Inc.	12,285		(688	)	11,597
Non-controlling interest	7,923		(689	)	7,234
Total shareholder’s equity	20,208		(1,377	)	18,831
Total liabilities and shareholder’s deficit	25,784		(1,377	)	24,407
Consolidated Statement of Operations
	Fiscal Year ending
	March 31, 2012
	As Reported		Adjustment		As Restated
	($000’s)		($000’s)		($000’s)
Exploration	4,954		1,048		6,002
General and administrative	16,877		329		17,206
Total expenses	21,831		1,377		23,208
Loss from operations	(21,831	)	(1,377	)	(23,208	)
Net loss	(65,580	)	(1,377	)	(66,957	)
Net loss attributable to non-controlling interest	2,702		689		3,391
Net loss attributable to Prospect Global Resources, Inc.	(62,878	)	(688	)	(63,566	)
Loss per share - basic and diluted	(112.28	)	(1.23	)	(113.51	)
Consolidated Statement of Operations
	Inception through
	March 31, 2012
	As Reported		Adjustment		As Restated
	($000’s)		($000’s)		($000’s)
Exploration	5,600		1,048		6,648
General and administrative	18,364		329		18,693
Total expenses	23,964		1,377		25,341
Loss from operations	(23,964	)	(1,377	)	(25,341	)
Net loss	(82,789	)	(1,377	)	(84,166	)
Net loss attributable to non-controlling interest	3,078		689		3,767
Net loss attributable to Prospect Global Resources, Inc.	(79,711	)	(688	)	(80,399	)
Loss per share - basic and diluted	(172.91	)	(1.49	)	(174.40	)
Consolidated Statement of Cash Flows
	Fiscal Year ended
	March 31, 2012
	As Reported		Adjustment		As Restated
	($000’s)		($000’s)		($000’s)
Operating Activities:
Net loss	(65,580	)	(1,377	)	(66,957	)
Accrued liabilities	299		471		770
Net cash used in operating activities	(10,443	)	(906	)	(11,349	)
Investing Activities:
Mineral Properties	(1,949	)	906		(1,043	)
Net cash used in investing activities	(2,030	)	906		(1,124	)
Consolidated Statement of Cash Flows
	Inception through
	March 31, 2012
	As Reported		Adjustment		As Restated
	($000’s)		($000’s)		($000’s)
Operating activities:
Net loss	(82,789	)	(1,377	)	(84,166	)
Accrued liabilities	386		471		857
Net cash used in operating activities	(11,712	)	(906	)	(12,618	)
Investing activities:
Mineral properties	(1,997	)	906		(1,091	)
Net cash used in investing activities	(2,086	)	906		(1,180	)
Consolidated Balance Sheet
	June 30, 2012
	As Reported		Adjustment		As Restated
	($000’s)		($000’s)		($000’s)
ASSETS
Mineral properties	20,067		(7,877	)	12,190
Total noncurrent assets	20,371		(7,877	)	12,494
Total assets	22,071		(7,877	)	14,194
SHAREHOLDER’S EQUITY
Common stock	39		(39	)	—
Additional paid-in capital	86,719		39		86,758
Losses accumulated in exploration stage	(83,032	)	(3,939	)	(86,971	)
Total shareholder’s equity - Prospect Global Resources, Inc.	4,727		(3,938	)	789
Non-controlling interest	7,915		(3,939	)	3,976
Total shareholder’s equity	12,642		(7,877	)	4,765
Total liabilities and shareholder’s equity	22,071		(7,877	)	14,194
Consolidated Statement of Operations
	Three months ended
	June 30, 2012
	As Reported		Adjustment		As Restated
	($000’s)		($000’s)		($000’s)
Exploration	—		5,568		5,568
General and administrative	3,328		932		4,260
Total expenses	3,328		6,500		9,828
Loss from operations	(3,328	)	(6,500	)	(9,828	)
Net loss	(3,328	)	(6,500	)	(9,828	)
Net loss attributable to non-controlling interest	7		3,250		3,257
Net loss attributable to Prospect Global Resources, Inc.	(3,321	)	(3,250	)	(6,571	)
Loss per share - basic and diluted	(4.20	)	(4.12	)	(8.32	)
Consolidated Statement of Operations
	Inception through June
	30, 2012
	As Reported		Adjustment		As Restated
	($000’s)		($000’s)		($000’s)
Exploration	5,600		6,616		12,216
General and administrative	21,692		1,261		22,953
Total expenses	27,292		7,877		35,169
Loss from operations	(27,292	)	(7,877	)	(35,169	)
Net loss	(86,117	)	(7,877	)	(93,994	)
Net loss attributable to non-controlling interest	3,085		3,939		7,024
Net loss attributable to Prospect Global Resources, Inc.	(83,032	)	(3,938	)	(86,970	)
Loss per share - basic and diluted	(164.42	)	(7.80	)	(172.22	)
Consolidated Statement of Cash Flows
	Three months ended
	June 30, 2012
	As Reported		Adjustment		As Restated
	($000’s)		($000’s)		($000’s)
Operating activities:
Net loss	(3,328	)	(6,500	)	(9,828	)
Accounts payable	434		1,722		2,156
Accrued liabilities	258		1,088		1,346
Net cash used in operating activities	(2,079	)	(3,690	)	(5,769	)
Investing activities:
Mineral properties	(3,788	)	3,690		(98	)
Net cash used in investing activities	(8,937	)	3,690		(5,247	)
Consolidated Statement of Cash Flows
	Inception through June
	30, 2012
	As Reported		Adjustment		As Restated
	($000’s)		($000’s)		($000’s)
Operating activities:
Net loss	(86,117	)	(7,877	)	(93,994	)
Accounts payable	1,106		1,723		2,829
Accrued liabilities	644		1,559		2,203
Net cash used in operating activities	(13,292	)	(4,595	)	(17,887	)
Investing activities:
Mineral properties	(5,784	)	4,595		(1,189	)
Net cash used in investing activities	(11,523	)	4,595		(6,928	)
Consolidated Balance Sheet
	September 30, 2012
	As Reported		Adjustment		As Restated
	($000’s)		($000’s)		($000’s)
ASSETS
Mineral properties	29,036		(16,846	)	12,190
Total noncurrent assets	29,638		(16,846	)	12,792
Total assets	41,604		(16,846	)	24,758
SHAREHOLDER’S DEFICIT
Common stock	55		(55	)	—
Additional paid-in capital	1,275		(4,691	)	(3,416	)
Losses accumulated in exploration stage	(96,977	)	(12,100	)	(109,077	)
Total shareholder’s (deficit) - Prospect Global Resources, Inc.	(95,646	)	(16,846	)	(112,492	)
Total shareholder’s (deficit)	(95,646	)	(16,846	)	(112,492	)
Total liabilities and shareholder’s deficit (deficit)	41,604		(16,846	)	24,758
Consolidated Statement of Operations
	Three months ended
	September 30, 2012
	As Reported		Adjustment		As Restated
	($000’s)		($000’s)		($000’s)
Exploration	—		5,802		5,802
General and administrative	12,080		3,167		15,247
Total expenses	12,080		8,969		21,049
Loss from operations	(12,080	)	(8,969	)	(21,049	)
Net loss	(13,951	)	(8,969	)	(22,920	)
Net loss attributable to non-controlling interest	6		807		813
Net loss attributable to Prospect Global Resources, Inc.	(13,945	)	(8,162	)	(22,107	)
Loss per share - basic and diluted	(12.75	)	(7.46	)	(20.21	)
Consolidated Statement of Operations
	Six Months ended
	September 30, 2012
	As Reported		Adjustment		As Restated
	($000’s)		($000’s)		($000’s)
Exploration	—		11,370		11,370
General and administrative	15,408		4,099		19,507
Total expenses	15,408		15,469		30,877
Loss from operations	(15,408	)	(15,469	)	(30,877	)
Net loss	(17,279	)	(15,469	)	(32,748	)
Net loss attributable to non-controlling interest	13		4,057		4,070
Net loss attributable to Prospect Global Resources, Inc.	(17,266	)	(11,412	)	(28,678	)
Loss per share - basic and diluted	(18.31	)	(12.10	)	(30.41	)
Consolidated Statement of Operations
	Inception through
	September 30, 2012
	As Reported		Adjustment		As Restated
	($000’s)		($000’s)		($000’s)
Exploration	5,600		12,418		18,018
General and administrative	33,771		4,428		38,199
Total expenses	39,371		16,846		56,217
Loss from operations	(39,371	)	(16,846	)	(56,217	)
Net loss	(100,068	)	(16,846	)	(116,914	)
Net loss attributable to non-controlling interest	3,091		4,746		7,837
Net loss attributable to Prospect Global Resources, Inc.	(96,977	)	(12,100	)	(109,077	)
Loss per share - basic and diluted	(168.66	)	(21.04	)	(189.70	)
Consolidated Statement of Cash Flows
	Six months ended
	September 30, 2012
	As Reported		Adjustment		As Restated
	($000’s)		($000’s)		($000’s)
Operating activities
Net loss	(17,279	)	(15,469	)	(32,748	)
Stock based compensation	8,228		2,454		10,682
Account payable	(249	)	2,348		2,099
Accrued liabilities	980		1,680		2,660
Net cash used in operating activities	(5,719	)	(8,987	)	(14,706	)
Investing activities
Mineral properties	(9,085	)	8,987		(98	)
Net cash used in investing activities	(9,481	)	8,987		(494	)
Consolidated Statement of Cash Flows
	Inception through
	September 30, 2012
	As Reported		Adjustment		As Restated
	($000’s)		($000’s)		($000’s)
Operating Activities:
Net loss	(100,068	)	(16,846	)	(116,914	)
Stock based compensation	17,946		2,454		20,400
Account payable	423		2,348		2,771
Accrued liabilities	1,365		2,151		3,516
Net cash used in operating activities	(17,430	)	(9,893	)	(27,323	)
Investing Activities:
Mineral Properties	(11,082	)	9,893		(1,189	)
Net cash used in investing activities	(11,567	)	9,893		(1,674	)
Consolidated Balance Sheet
	December 31, 2012
	As Reported		Adjustment		As Restated
	($000’s)		($000’s)		($000’s)
ASSETS
Mineral properties	35,991		(23,801	)	12,190
Deferred fees	7,751		(7,751	)	—
Total noncurrent assets	44,517		(31,554	)	12,963
Total assets	55,304		(31,554	)	23,750
SHAREHOLDER’S DEFICIT
Common stock	73		(72	)	1
Additional paid-in capital	34,265		(5,046	)	29,219
Losses accumulated in exploration stage	(116,727	)	(26,436	)	(143,163	)
Total shareholder’s deficit - Prospect Global Resources, Inc.	(82,390	)	(31,554	)	(113,944	)
Non-controlling interest	—		—		—
Total shareholder’s deficit	(82,390	)	(31,554	)	(113,944	)
Total liabilities and shareholder’s deficit	55,304		(31,554	)	23,750
Consolidated Statement of Operations
	Three months ended
	December 31, 2012
	As Reported		Adjustment		As Restated
	($000’s)		($000’s)		($000’s)
Exploration	—		5,646		5,646
General and administrative	15,110		937		16,047
Off-take arrangement fee	—		7,751		7,751
Total expenses	15,110		14,334		29,444
Loss from operations	(15,110	)	(14,334	)	(29,444	)
Net loss	(19,751	)	(14,334	)	(34,085	)
Net loss attributable to non-controlling interest	—		—		—
Net loss attributable to Prospect Global Resources, Inc.	(19,751	)	(14,334	)	(34,085	)
Loss per share - basic and diluted	(15.36	)	(11.14	)	(26.50	)
Consolidated Statement of Operations
	Nine Months ended
	December 31, 2012
	As Reported		Adjustment		As Restated
	($000’s)		($000’s)		($000’s)
Exploration	—		17,016		17,016
General and administrative	30,518		5,036		35,554
Off-take arrangement fee	—		7,751		7,751
Total expenses	30,518		29,803		60,321
Loss from operations	(30,518	)	(29,803	)	(60,321	)
Net loss	(37,030	)	(29,803	)	(66,833	)
Net loss attributable to non-controlling interest	12		4,057		4,069
Net loss attributable to Prospect Global Resources, Inc.	(37,018	)	(25,746	)	(62,764	)
Loss per share - basic and diluted	(34.99	)	(24.33	)	(59.32	)
Consolidated Statement of Operations
	Inception through
	December 31, 2012
	As Reported		Adjustment		As Restated
	($000’s)		($000’s)		($000’s)
Exploration	5,600		18,064		23,664
General and administrative	48,881		5,365		54,246
Off-take arrangement fee	—		7,751		7,751
Total expenses	54,481		31,180		85,661
Loss from operations	(54,481	)	(31,180	)	(85,661	)
Net loss	(119,819	)	(31,180	)	(150,999	)
Net loss attributable to non-controlling interest	3,091		4,746		7,837
Net loss attributable to Prospect Global Resources, Inc.	(116,728	)	(23,434	)	(140,162	)
Loss per share - basic and diluted	(182.10	)	(36.56	)	(218.66	)
Consolidated Statement of Cash Flows
	Nine months ended
	December 31, 2012
	As Reported		Adjustment		As Restated
	($000’s)		($000’s)		($000’s)
Operating activities:
Net loss	(37,030	)	(29,803	)	(66,833	)
Services paid for with securities	672		3,875		4,547
Stock based compensation	12,649		2,578		15,227
Deferred fees	(1,938	)	1,938		—
Accounts payable	(1,773	)	3,191		1,418
Accrued liabilities	1,781		2,780		4,561
Net cash used in operating activities	(12,650	)	(15,441	)	(28,091	)
Investing activities:
Mineral properties	(15,539	)	15,441		(98	)
Net cash used in investing activities	(16,181	)	15,441		(740	)
Consolidated Statement of Cash Flows
	Inception through
	December 31, 2012
	As Reported		Adjustment		As Restated
	($000’s)		($000’s)		($000’s)
Operating activities
Net loss	(119,819	)	(31,180	)	(150,999	)
Services paid for with securities	3,052		3,876		6,928
Stock based compensation	22,367		2,578		24,945
Deferred fees	(1,938	)	1,938		—
Accounts payable	(1,101	)	3,191		2,090
Accrued liabilities	2,165		3,252		5,417
Net cash used in operating activities	(24,363	)	(16,345	)	(40,708	)
Investing activities
Mineral properties	(17,535	)	16,345		(1,190	)
Net cash used in investing activities	(18,266	)	16,345		(1,921	)

Organization_and_Business_Oper1

Organization and Business Operations (Details) (AWP, USD $)	12 Months Ended		1 Months Ended	0 Months Ended	11 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2013	Aug. 01, 2012	Jul. 31, 2011	Aug. 01, 2012	Nov. 30, 2011
			Sharing agreement	Karlsson	Karlsson
			acre		Operating Agreement
			item		acre
					item
Organization and Business Operations	'	'	'	'	'
Amount of cash contributions made	$11	'	'	'	$11
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%	'

Organization_and_Business_Oper2

Organization and Business Operations (Details 2) (AWP)	12 Months Ended	0 Months Ended	12 Months Ended	0 Months Ended
	Dec. 31, 2011	Jan. 21, 2011	Dec. 31, 2011	Jul. 27, 2011
	item	Operating Agreement	Operating Agreement	Sharing agreement
		item	item	acre
		acre		item
Organization and Business Operations	'	'	'	'
Number of Arizona state sections on which permits are held	'	38	'	'
Number of private sections	'	8	'	'
Number of private mineral estate sections covered	'	101	'	101
Mineral leases, acres	'	90,000	'	'
Term of state permit	'	5	'	'
Number of state permits that expire in 2014	'	15	'	'
Number of state permits that expire in 2015	'	23	'	'
2D seismic data acquired (in miles)	70	'	'	'
Number of holes of which drilling and coring completed	12	'	'	'
Number of holes in project area	'	'	58	'
Number of mineral estate sections covered under the company's existing mineral rights	'	'	'	50
Area of private mineral leases adjacent to or in close proximity to existing mineral rights (in acres)	'	'	'	62,000
Number of consecutive days of cessation of operations for termination of agreement	'	'	'	'180 days

Organization_and_Business_Oper3

Organization and Business Operations (Details 3) (USD $)	Jul. 01, 2013	Mar. 31, 2013	Jun. 26, 2013	Apr. 15, 2013	Apr. 15, 2013	Jun. 26, 2013	Jun. 26, 2013	2-May-13	Apr. 15, 2013
In Millions, unless otherwise specified			Karlsson Group	Karlsson Group	Karlsson Group	Karlsson Group	Karlsson Group	Two stockholders	Karlsson and Apollo
			Karlsson Note Amendment	Karlsson Note Amendment	Karlsson Note Amendment	Second Extension Agreement	Second Extension Agreement	Bridge Loan	Second Extension Agreement
			Subsequent Events	Subsequent Events	Forecast	Subsequent Events	Subsequent Events	Subsequent Events	Subsequent Events
					By August 1, 2014		Minimum		Apollo Notes
					Subsequent Events		item
Short-Term Liquidity and Capital Needs	'	'	'	'	'	'	'	'	'
Cash	'	$1	'	'	'	'	'	'	'
Working capital deficit	'	-144.7	'	'	'	'	'	'	'
Accounts payable and accrued liabilities	'	14.6	'	'	'	'	'	'	'
Indebtedness	'	128.3	'	'	'	'	'	'	'
Number of wells on which the complete total depth milestone is required	'	'	'	'	'	'	8	'	'
Percentage of additional proceeds required to place in escrow	'	'	'	'	'	0.5	'	'	'
Capital raised, a portion of which is required to be deposited into escrow	'	'	'	30	'	24	'	'	'
Escrow deposit required	'	'	'	9.2	'	12	'	'	'
Proceeds from public offering placed into escrow	'	'	2.1	'	'	2	'	'	'
Proceeds from public offering	'	'	'	'	'	5	'	'	'
Remaining escrow obligation	'	'	'	'	'	10	'	'	'
Principal payments payable expressed as a percentage of capital raised	'	'	'	'	'	'	'	'	10.00%
Capital raising milestones	'	'	'	'	25	'	'	'	'
Borrowings	'	'	'	'	'	'	'	5.5	'
Available cash	1.4	'	'	'	'	'	'	'	'
Escrowed cash	2.4	'	'	'	'	'	'	'	'
Net proceeds received from shareholder rights offering	$4.10	'	'	'	'	'	'	'	'

Summary_of_Significant_Account2

Summary of Significant Accounting Principles (Details) (USD $)	12 Months Ended		12 Months Ended				12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013	Mar. 31, 2013	Mar. 31, 2013	Aug. 01, 2012	Mar. 31, 2013	Mar. 31, 2013	Mar. 31, 2013	Aug. 01, 2012
	item		Equipment	Equipment	Karlsson Group	Karlsson Group	Old Prospect Global	AWP	AWP	AWP
			Minimum	Maximum					Karlsson Group	Karlsson Group
Principles of Consolidation	'	'	'	'	'	'	'	'	'	'
Percentage of ownership interest held	'	'	'	'	'	'	100.00%	100.00%	'	'
Percentage of ownership interest held by non-controlling owners	'	'	'	'	50.00%	50.00%	'	'	50.00%	50.00%
Exploration Stage	'	'	'	'	'	'	'	'	'	'
Number of mineral properties having proven or probable reserves	0	'	'	'	'	'	'	'	'	'
Cash and Cash Equivalents	'	'	'	'	'	'	'	'	'	'
Cash equivalents	$0	$0	'	'	'	'	'	'	'	'
Equipment	'	'	'	'	'	'	'	'	'	'
Estimated useful lives of assets	'	'	'2 years	'10 years	'	'	'	'	'	'
Income Taxes	'	'	'	'	'	'	'	'	'	'
Penalties or interest recognized in the statement of operations	0	'	'	'	'	'	'	'	'	'
Penalties or interest accrued on the balance sheet	$0	'	'	'	'	'	'	'	'	'

The_Karlsson_Group_Acquisition1

The Karlsson Group Acquisition (Details) (USD $)	0 Months Ended					0 Months Ended			12 Months Ended
	Aug. 01, 2012	30-May-12	30-May-12	30-May-12	30-May-12	30-May-12	30-May-12	30-May-12	Mar. 31, 2013
	Karlsson Group	Karlsson Group	Karlsson Group	Karlsson Group	AWP	AWP	AWP	AWP	AWP
			Warrant	Senior secured promissory note		Karlsson Group	Karlsson Group	Karlsson Group	Affiliate of Karlsson Group
							Forecast	Forecast	acre
								Minimum
Acquisition	'	'	'	'	'	'	'	'	'
Interest acquired (as a percent)	'	'	'	'	50.00%	'	'	'	'
Cash paid to acquire the entity	'	$6,000,000	'	'	'	'	'	'	'
Amount credited against purchase price	'	5,500,000	'	'	'	'	'	'	'
Number of common stock that can be purchased against warrants (in shares)	'	'	112,117	'	'	'	'	'	'
Exercise price (in dollars per share)	'	'	$212.50	'	'	'	'	'	'
Additional cash paid to acquire the entity	'	19,500,000	'	'	'	'	'	'	'
Face value	'	'	'	125,000,000	'	'	'	'	'
Royalty as a percentage of gross sales granted	2.00%	'	'	'	'	1.00%	'	'	'
Cap amount of royalty granted as a percentage of gross sales	'	'	'	'	'	75,000,000	'	'	'
Royalty as a percentage of net proceeds from future sale or merger of AWP	'	'	'	'	'	'	15.00%	'	'
Cap amount of royalty granted as a percentage of net proceeds from future sale or merger of AWP	'	'	'	'	'	'	75,000,000	'	'
Percent of AWP in a future sale on or before August 1, 2016 required for additional payment to The Karlsson Group	'	'	'	'	'	'	'	50.00%	'
Period within which the option to purchase the area may be exercised	'	'	'	'	'	'	'	'	'150 days
Area for which the entity received purchase option (in acres)	'	'	'	'	'	'	'	'	5,080
Purchase price of area for which the entity received purchase option	'	'	'	'	'	'	'	'	$250,000

Other_Current_Assets_Details

Other Current Assets (Details) (USD $)	Mar. 31, 2013	Mar. 31, 2012
In Thousands, unless otherwise specified
Other Current Assets	'	'
Prepaid insurance & rent	$276	$223
Other	389	605
SK Land Holdings Option	500	'
Total other current assets	$1,165	$828

Offtake_Arrangement_Fee_Detail

Off-take Arrangement Fee (Details) (USD $)	3 Months Ended	9 Months Ended	12 Months Ended	29 Months Ended	32 Months Ended		0 Months Ended	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2012	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2013	Mar. 31, 2012	Oct. 18, 2012	Mar. 31, 2013
							Off-take agreement	Off-take agreement
							Sichuan	Sichuan
							t
Off-take arrangement fees	'	'	'	'	'	'	'	'
Minimum purchase obligation (in metric tonnes)	'	'	'	'	'	'	500,000	'
Period of purchase commitment starting with the commencement of production at Holbrook, Arizona facility	'	'	'	'	'	'	'	'10 years
One-time third party arrangement fee	'	'	'	'	'	'	$7,800,000	'
One-time third party off-take arrangement fee	7,751,000	7,751,000	7,751,000	7,751,000	7,751,000	'	'	'
Third party arrangement fee payable as a percentage of cash	'	'	'	'	'	'	50.00%	'
Third party arrangement fee payable as a percentage of common stock	'	'	'	'	'	'	50.00%	'
One-time third party arrangement fee payable in common stock shares	'	'	'	'	'	'	33,125	'
Number of shares of common stock issued	'	'	1,451,914	'	1,451,914	789,783	'	33,125
Amount paid to third party	'	'	'	'	'	'	'	2,300,000
Remaining amount payable included in accrued liabilities	'	'	$11,758,000	'	$11,758,000	$844,000	'	$1,600,000

Accounts_Payable_and_Accrued_L2

Accounts Payable and Accrued Liabilities (Details) (USD $)	Mar. 31, 2013	Mar. 31, 2012
In Thousands, unless otherwise specified
Accounts Payable and Accrued Liabilities	'	'
Drilling/permitting	$140	$471
Mineral lease obligations	1,500	'
Legal	112	280
Vacation, bonuses and severance pay	982	27
Board of directors fees	125	'
Off-take arrangement fee	1,588	'
Interest on promissory notes	7,229	'
Other	82	66
Total accrued liabilities	$11,758	$844

Debt_Details

Debt (Details) (USD $)

12 Months Ended

0 Months Ended

1 Months Ended

12 Months Ended

0 Months Ended

0 Months Ended

12 Months Ended

Mar. 31, 2013

Aug. 01, 2012

Mar. 31, 2013

Apr. 15, 2013

Aug. 01, 2012

Nov. 30, 2012

Mar. 31, 2013

30-May-12

Aug. 01, 2012

Aug. 01, 2012

Mar. 31, 2013

Mar. 31, 2013

Mar. 07, 2013

Mar. 31, 2013

AWP

Apollo Notes

Karlsson Group

Karlsson Group

Karlsson Group

Karlsson Group

Karlsson Group

Karlsson Group

Karlsson Group

Karlsson Group

Karlsson Group

Affiliates of Apollo Global Management, LLC

Affiliates of Apollo Global Management, LLC

Senior secured promissory note

Senior secured promissory note

Senior secured promissory note

Senior secured promissory note

Senior secured promissory note

Senior secured promissory note

Senior secured promissory note

Senior secured promissory note

Senior secured promissory note

Apollo Notes

Apollo Notes

item

March 30, 2013 Installment Due

July 31, 2013 Installment Due

AWP

Old Prospect Global

item

Debt

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Total debt

$128,258,000

'

$6,750,000

'

'

'

$115,282,000

'

'

'

'

'

'

'

Tax gross-up

6,226,000

'

'

'

'

'

'

'

'

'

'

6,200,000

'

'

Less: current portion

-128,258,000

'

'

'

'

'

'

'

'

'

'

'

'

'

Face value

'

'

'

'

'

'

'

125,000,000

'

'

'

'

'

'

Interest rate (as a percent)

'

'

'

9.00%

'

'

'

'

'

'

'

'

'

'

Principal payments made

'

'

'

'

'

9,700,000

'

'

'

'

'

'

'

'

Principal payments payable expressed as percentage of net proceeds

40.00%

'

'

40.00%

'

40.00%

'

'

'

'

'

'

'

33.00%

Number of installments in which principal amount is payable

'

'

'

'

2

'

'

'

'

'

'

'

'

'

Periodic principal payment (in dollars)

'

'

'

'

'

'

'

'

40,300,000

75,000,000

'

'

'

'

Period for mandatory pre-payment of debt

'

'

'

'

'

'

'5 days

'

'

'

'

'

'

'

Minimum ownership percentage to avoid pre-payment

'

50.00%

'

'

'

'

'

'

'

'

50.00%

'

'

'

Note payable including tax gross-up, accrued interest and the remaining unpaid principal balance

'

'

'

'

'

'

128,700,000

'

'

'

'

'

'

'

Prepayment Option

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Amount of principal to be paid for satisfaction of balance of debt on or before December 15, 2012

'

'

'

'

100,000,000

'

'

'

'

'

'

'

'

'

Estimated fair value of Prepayment Option

'

'

'

'

1,900,000

'

0

'

'

'

'

'

'

'

Change in fair value of the Prepayment Option

'

'

'

'

'

'

1,900,000

'

'

'

'

'

'

'

Payment of notes payable in cash

'

'

'

'

'

'

'

'

'

'

'

'

800,000

'

Number of promissory notes issued

'

'

'

'

'

'

'

'

'

'

'

'

2

'

Payment of debt instrument

'

'

'

'

'

'

'

'

'

'

'

'

6,800,000

'

Apollo reimbursement expense

'

'

'

'

'

'

'

'

'

'

'

'

$2,200,000

'

Interest rate (as a percent)

'

'

'

'

'

'

'

'

'

'

'

'

'

11.00%

Convertible_Notes_Details

Convertible Notes (Details) (USD $)	12 Months Ended		0 Months Ended			0 Months Ended				0 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Feb. 11, 2011	Nov. 22, 2011	Nov. 22, 2011	Nov. 22, 2011	Apr. 25, 2011	Mar. 31, 2012	Nov. 22, 2011	Nov. 22, 2011	Sep. 19, 2011
			2010 Convertible Notes	$2.0 million face value secured convertible note due January 24, 2012	$0.5 million COR Secured Convertible Note	$2.5 million Hexagon Secured Convertible Note	$2.5 million Hexagon Secured Convertible Note	$1.5 million Avalon Secured Convertible Note	$1.5 million Avalon Secured Convertible Note	$1.5 million Hexagon Secured Convertible Note	$1.5 million Hexagon Secured Convertible Note
			Prospect Global Acquisition Inc.
Convertible Notes	'	'	'	'	'	'	'	'	'	'	'
Convertible notes	$0	$0	$1,048,863	'	'	'	'	'	'	'	'
Convertible notes and accrued interest converted into common stock (in shares)	'	'	7,171	'	'	17,630	'	'	'	7,981	'
Face value	'	'	'	$2,000,000	$500,000	$2,500,000	$2,500,000	$1,500,000	$1,500,000	$1,500,000	$1,500,000

Convertible_Notes_Details_2

Convertible Notes (Details 2) (USD $)

12 Months Ended

32 Months Ended

0 Months Ended

0 Months Ended

0 Months Ended

0 Months Ended

12 Months Ended

32 Months Ended

Mar. 31, 2012

Mar. 31, 2013

Jan. 24, 2011

Mar. 31, 2012

Mar. 31, 2012

Mar. 11, 2011

Apr. 25, 2011

Mar. 31, 2012

Aug. 03, 2011

Mar. 31, 2012

Nov. 22, 2011

Sep. 19, 2011

Mar. 31, 2012

Mar. 31, 2013

Mar. 31, 2012

Mar. 31, 2013

Merkin Note $2.0 million Face Value

Merkin Note $2.0 million Face Value

COR Note $0.5 million Face Value

COR Note $0.5 million Face Value

Hexagon Note $2.5 million Face Value

Hexagon Note $2.5 million Face Value

Avalon Note $1.5 million Face Value

Avalon Note $1.5 million Face Value

Avalon Note $1.5 million Face Value

Second Hexagon Note $1.5 million Face Value

Second Hexagon Note $1.5 million Face Value

Secured Convertible Notes

Secured Convertible Notes

Secured Convertible Notes

Convertible Notes

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Proceeds

'

'

'

($2,000,000)

($500,000)

'

'

($2,500,000)

'

($1,500,000)

($1,500,000)

'

($1,500,000)

'

'

'

Proceeds

-5,500,000

-9,049,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Compound embedded derivative

'

'

10,068,000

'

'

333,000

460,000

'

708,000

'

'

432,000

'

'

'

'

Warrant derivative liability

'

'

'

'

'

'

3,954,000

'

5,147,000

'

'

2,135,000

'

'

'

'

Day-one derivative gain (loss)

'

'

-8,068,000

'

'

'

-1,914,000

'

-4,355,000

'

'

-1,067,000

'

'

'

'

Carrying value

'

'

'

'

'

167,000

'

'

'

'

'

'

'

'

'

'

Amortization of debt discounts (premiums)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$1,500,000

$1,600,000

Derivative_Financial_Instrumen2

Derivative Financial Instruments (Details) (USD $)

12 Months Ended

32 Months Ended

12 Months Ended

12 Months Ended

0 Months Ended

12 Months Ended

8 Months Ended

Mar. 31, 2013

Mar. 31, 2012

Mar. 31, 2013

Mar. 31, 2013

Aug. 01, 2012

Mar. 31, 2012

Mar. 31, 2013

Mar. 31, 2012

Jan. 24, 2011

Apr. 25, 2011

Aug. 03, 2011

Sep. 19, 2011

Mar. 31, 2012

Mar. 31, 2013

Mar. 31, 2011

Karlsson Group

Karlsson Group

Compound embedded derivatives

Compound embedded derivatives

Day-one derivative losses

Day-one derivative losses

Day-one derivative losses

Day-one derivative losses

Day-one derivative losses

Warrant derivative liabilities

Warrant derivative liabilities

Secured Convertible Notes

Senior secured promissory note

Senior secured promissory note

$2.0 million face value secured convertible note due January 24, 2012

$2.5 million face value secured convertible note due April 24, 2012

$1.5 million face value secured convertible note due August 3, 2012

$1.5 million face value secured convertible note due September 18, 2012

Derivative Financial Instruments

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Derivative assets

$0

$0

$0

'

'

'

'

'

'

'

'

'

'

'

'

Estimated fair value of Prepayment Option

'

'

'

0

1,900,000

'

'

'

'

'

'

'

'

'

'

Fair values of the compound derivatives and the warrant liabilities

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Total derivative loss

($1,900,000)

($39,810,000)

($56,666,000)

'

'

($23,525,000)

'

($7,336,000)

($8,068,182)

($1,914,322)

($4,354,600)

($1,067,188)

($8,949,000)

'

$0

Derivative_Financial_Instrumen3

Derivative Financial Instruments (Details 2) (Derivative Financial Information, USD $)	12 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2012
Derivative Financial Information	'
Reconciliation of changes in the fair value of financial liabilities classified as Level 3 in the fair valued hierarchy	'
Balance at the beginning of the period	($17,288)
Total gains or losses (realized or unrealized) included in earnings	-20,956
Warrant issuances	-12,396
Warrant reclassification to equity	20,228
Debenture issuances	-12,001
Debenture conversions	$42,413

Grandhaven_Option_Details

Grandhaven Option (Details) (USD $)	Mar. 31, 2012	Nov. 22, 2011
In Thousands, unless otherwise specified		Hexagon
		item
Grandhaven Option	'	'
Number of transactions completed	'	2
Overriding royalty interest (as a percent)	'	1.00%
Fair value of Grandhaven Option upon issuance	$4,060	$4,100

Related_Party_Transactions_Det

Related Party Transactions (Details) (USD $)

12 Months Ended

32 Months Ended

0 Months Ended

0 Months Ended

0 Months Ended

12 Months Ended

32 Months Ended

12 Months Ended

0 Months Ended

12 Months Ended

32 Months Ended

0 Months Ended

1 Months Ended

0 Months Ended

0 Months Ended

Mar. 31, 2013

Mar. 31, 2012

Mar. 31, 2013

Mar. 31, 2013

Mar. 31, 2012

Nov. 22, 2011

Nov. 22, 2011

Apr. 25, 2011

Mar. 31, 2013

Mar. 31, 2013

Nov. 22, 2011

Sep. 19, 2011

Mar. 31, 2013

Mar. 31, 2013

Sep. 19, 2011

Mar. 31, 2013

Aug. 01, 2012

Mar. 31, 2013

Mar. 31, 2012

Mar. 31, 2013

Apr. 15, 2013

Aug. 01, 2012

Aug. 01, 2012

Mar. 31, 2013

Mar. 31, 2013

Aug. 01, 2012

31-May-13

Mar. 31, 2013

Mar. 31, 2012

Mar. 31, 2013

Jul. 02, 2012

31-May-13

Nov. 22, 2011

Nov. 22, 2011

Mar. 31, 2013

Nov. 22, 2011

Nov. 22, 2011

Jul. 05, 2012

2-May-13

Options

Options

Secured convertible notes held by COR

$2,500,000 Hexagon Secured Convertible Note

$2,500,000 Hexagon Secured Convertible Note

$2,500,000 Hexagon Secured Convertible Note

$2,500,000 Hexagon Secured Convertible Note

$1,500,000 Hexagon Secured Convertible Note

$1,500,000 Hexagon Secured Convertible Note

Maximum

Maximum

Maximum

Quincy Prelude LLC

Buffalo

Buffalo

Buffalo

Buffalo

Buffalo

Buffalo

Buffalo

Buffalo

Buffalo

Buffalo

Mr. Brownstein's father

Brownstein Hyatt Farber Schreck, LLP

Brownstein Hyatt Farber Schreck, LLP

Brownstein Hyatt Farber Schreck, LLP

Brownstein Hyatt Farber Schreck, LLP

Brownstein Hyatt Farber Schreck, LLP

Hexagon

Grandhaven

Grandhaven

Grandhaven

Very Hungry

Very Hungry

Very Hungry and the Scott Reiman 1991 Trust

item

First Warrant exercisable until April 25, 2013

Second Warrant exercisable until April 25, 2014

$2,500,000 Hexagon Secured Convertible Note

$2,500,000 Hexagon Secured Convertible Note

$1,500,000 Hexagon Secured Convertible Note

Common Stock

Subsequent Events

Warrant issued in connection with services for public offering

Warrant issued in connection with terminating right to future transaction fee

Barry Munitz

Quincy Prelude LLC

AWP

Secured convertible notes held by COR

Subsequent Events

Conway Schatz

AWP

Very Hungry warrant exercisable through August 5, 2013

Common Stock

Subsequent Events

First Warrant exercisable until April 25, 2013

Second Warrant exercisable until April 25, 2014

Minimum

Warrant issued for fee in connection with the acquisition

Director Plan

Options

Bridge Loan

Options

Related Party Transactions

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Beneficial ownership held by stockholder in reporting entity (as a percent)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

5.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Voting interest held by a stockholder in a related party (as a percent)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

100.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Economic interest held by a stockholder in a related party (as a percent)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

75.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Non-voting economic interest held by a stockholder in a related party (as a percent)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

15.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Amount paid to related party

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$1,100,000

$300,000

$1,400,000

'

'

'

'

'

$975,000

'

$3,600,000

$500,000

$4,300,000

'

'

'

'

'

'

'

'

'

Number of common stock that can be purchased against warrants (in shares)

'

'

'

'

'

'

'

'

'

'

'

'

13,333

50,000

19,608

'

52,409

'

'

'

'

5,366

40,000

'

'

7,043

'

'

'

'

'

'

'

'

'

'

51,765

'

'

Exercise price (in dollars per share)

'

'

'

'

'

'

'

'

$150

$150

'

$191.50

'

'

'

'

$130

'

'

'

'

$130

$130

'

'

$130

'

'

'

'

'

'

'

'

'

'

$212.50

'

$15

Fee payable in connection with acquisition

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1,500,000

'

'

'

'

'

'

'

'

'

'

'

'

'

Number of shares of common stock issued

1,451,914

789,783

1,451,914

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

308,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

96,154

'

Consulting fee payable per month

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

20,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Annual management fee payable as a percentage of annual gross revenues

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2.00%

'

2.00%

1.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Share price (in dollars per share)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$130

'

'

'

'

'

'

'

'

$130

'

'

'

'

'

'

$130

'

Extension period in the event of a change of control

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'2 years

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Fair value of the warrant

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

5,200,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Significant inputs used in estimation of fair value of the warrant

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Estimated term

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'5 years

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Estimated volatility (as a percent)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

177.26%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Risk free rate (as a percent)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0.61%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Dividends (as a percent)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Number of shares controlled by related party

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

35,563

'

'

'

'

'

'

'

2,800

'

'

'

'

Amount due to related party included in accrued liabilities and account payable

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

25,000

'

'

'

'

'

'

'

'

800,000

300,000

800,000

'

'

'

'

'

'

'

'

'

Term of options

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'10 years

'

'

'

'

'

'

'

'

Number of shares issued to a related party

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2,400

15,640

'

'

'

'

'

'

'

Amount payable to related party for services rendered

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

200,000

'

200,000

'

'

'

'

'

'

'

'

'

Authorized shares under each demand registration for demand and piggy-back registration rights under the amended registration rights agreement

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

22,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Interest acquired (as a percent)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

50.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

Face value

'

'

'

'

'

500,000

2,500,000

2,500,000

'

'

1,500,000

1,500,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Net proceeds

'

5,500,000

9,049,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Convertible notes converted into number of common stock (in shares)

'

'

'

'

'

'

17,630

'

'

'

7,981

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Number of warrants issued

'

'

'

'

'

'

'

2

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Number of shares of common stock sold

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

51,765

'

'

Total cash proceeds

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

11,000,000

'

'

Overriding royalty interest (as a percent)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1.00%

1.00%

'

'

'

'

'

Amount granted to a related party in exchange of overriding royalty interest

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

25,000

'

'

'

'

'

Assigned royalty interest (as a percent)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1.39%

'

'

'

Purchase price per common stock (in dollars per share)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$212.50

'

'

'

Exercise price (in dollars per share)

'

'

'

$160.71

$212.50

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$130

'

'

'

'

Total cash proceeds from public offering

66,290,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

12,500,000

'

Amount borrowed

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

5,000,000

Amount of unsecured subordinated promissory notes exchanged

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$5,500,000

Equity_Based_Compensation_Deta

Equity Based Compensation (Details) (USD $)

12 Months Ended

32 Months Ended

12 Months Ended

32 Months Ended

12 Months Ended

32 Months Ended

12 Months Ended

Mar. 31, 2013

Mar. 31, 2013

Mar. 31, 2013

Mar. 31, 2012

Mar. 31, 2013

Mar. 31, 2013

Mar. 31, 2013

Mar. 31, 2013

Mar. 31, 2012

Mar. 31, 2013

Mar. 31, 2013

Mar. 31, 2013

Mar. 31, 2013

Aug. 27, 2012

Mar. 31, 2013

Aug. 27, 2012

Stock Options

Stock Options

Stock Options

Stock Options

Stock Options

Warrants Issued for Services

Warrants Issued for Services

Warrants Issued for Services

Warrants Issued for Services

Warrants Issued for Services

Employee Plan

Employee Plan

Director Plan

Director Plan

Minimum

Maximum

Minimum

Maximum

Stock Options

Stock Options

Stock Options

Stock Options

Equity Based Compensation

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Shares authorized for issuance

'

'

'

'

'

'

'

'

'

'

'

'

'

270,000

'

164,000

Shares remained available for issuance

'

'

'

'

'

'

'

'

'

'

'

'

177,340

'

70,500

'

Fair value assumptions

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Expected term

'

'

'

'

'

'5 years

'9 years 5 months 19 days

'

'

'

'2 years

'5 years

'

'

'

'

Volatility, Minimum (as a percent)

'

'

128.57%

'

'

'

'

106.22%

'

'

'

'

'

'

'

'

Volatility, Maximum (as a percent)

'

'

181.46%

'

'

'

'

177.26%

'

'

'

'

'

'

'

'

Risk-free rate, minimum (as a percent)

'

'

0.63%

'

'

'

'

0.22%

'

'

'

'

'

'

'

'

Risk-free rate, maximum (as a percent)

'

'

2.00%

'

'

'

'

1.52%

'

'

'

'

'

'

'

'

Shares

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Outstanding at the beginning of the period (in shares)

'

'

68,000

'

'

'

'

'

'

'

'

'

'

'

'

'

Granted (in shares)

'

'

127,000

'

'

'

'

'

'

'

'

'

'

'

'

'

Forfeited or expired (in shares)

'

'

-9,000

'

-153,000

'

'

'

'

'

'

'

'

'

'

'

Outstanding at the end of the period (in shares)

'

'

186,000

68,000

186,000

'

'

'

'

'

'

'

'

'

'

'

Vested at the end of the period (in shares)

'

'

132,000

'

132,000

'

'

'

'

'

'

'

'

'

'

'

Weighted-Average Exercise Price

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Outstanding at the beginning of the period (in dollars per share)

'

'

$212.50

'

'

'

'

'

'

'

'

'

'

'

'

'

Granted (in dollars per share)

'

'

$130.66

'

'

'

'

'

'

'

'

'

'

'

'

'

Forfeited or expired (in dollars per share)

'

'

$130

'

'

'

'

'

'

'

'

'

'

'

'

'

Outstanding at the end of the period (in dollars per share)

'

'

$160.71

$212.50

$160.71

'

'

'

'

'

'

'

'

'

'

'

Vested at the end of the period (in dollars per share)

'

'

$171.67

'

$171.67

'

'

'

'

'

'

'

'

'

'

'

Aggregate Intrinsic Value

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Outstanding at the end of the period (in dollars)

'

'

$19,636,000

'

$19,636,000

'

'

'

'

'

'

'

'

'

'

'

Weighted-Average Remaining Term

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Outstanding at the beginning of the period

'

'

'9 years 7 days

'7 years 8 months 8 days

'

'

'

'

'

'

'

'

'

'

'

'

Granted during the period

'

'

'9 years 4 days

'

'

'

'

'

'

'

'

'

'

'

'

'

Outstanding at the end of the period

'

'

'9 years 7 days

'7 years 8 months 8 days

'

'

'

'

'

'

'

'

'

'

'

'

Vested the end of the period

'

'

'8 years 10 months 13 days

'

'

'

'

'

'

'

'

'

'

'

'

'

Additional disclosures

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Weighted average grant date fair value (in dollars per share)

'

'

$95.24

$156.77

$108.43

'

'

'

'

'

'

'

'

'

'

'

Non-vested Stock Options, Shares

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Non-vested at the beginning of the period (in shares)

'

'

20,000

'

'

'

'

'

'

'

'

'

'

'

'

'

Granted (in shares)

'

'

127,000

'

'

'

'

'

'

'

'

'

'

'

'

'

Vested (in shares)

'

'

-84,000

'

'

'

'

'

'

'

'

'

'

'

'

'

Forfeited (in shares)

'

'

-9,000

'

'

'

'

'

'

'

'

'

'

'

'

'

Non-vested at the end of the period (in shares)

'

'

54,000

20,000

54,000

'

'

'

'

'

'

'

'

'

'

'

Non-vested Stock Options, Weighted Average Grant Date Fair Value

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Non-vested at the beginning of the period (in dollars per share)

'

'

$123.48

'

'

'

'

'

'

'

'

'

'

'

'

'

Granted (in dollars per share)

'

'

$95.24

'

'

'

'

'

'

'

'

'

'

'

'

'

Vested (in dollars per share)

'

'

$96.24

'

'

'

'

'

'

'

'

'

'

'

'

'

Forfeited (in dollars per share)

'

'

$123.10

'

'

'

'

'

'

'

'

'

'

'

'

'

Non-vested at the end of the period (in dollars per share)

'

'

$99.63

$123.48

$99.63

'

'

'

'

'

'

'

'

'

'

'

Additional disclosures

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Total unrecognized compensation expense (in dollars)

'

'

2,200,000

'

2,200,000

'

'

'

'

'

'

'

'

'

'

'

Weighted-average period over which cost is expected to be recognized

'

'

'1 year

'

'

'

'

'

'

'

'

'

'

'

'

'

Stock-based compensation costs

'

'

10,300,000

9,700,000

16,900,000

'

'

5,900,000

'

5,900,000

'

'

'

'

'

'

Stock compensation capitalized (in dollars)

$3,077,000

$3,078,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Number of common stock that can be purchased against warrants (in shares)

'

'

'

'

'

'

'

97,936

'

97,936

'

'

'

'

'

'

Exercise price (in dollars per share)

'

'

'

'

'

'

'

'

'

'

$62.50

$251

'

'

'

'

Warrants committed for issuance in the next twelve months (in shares)

'

'

'

'

'

'

'

800

'

800

'

'

'

'

'

'

Shareholders_Equity_Details

Shareholders' Equity (Details) (USD $)	0 Months Ended
	Sep. 04, 2013	Mar. 31, 2013	Aug. 27, 2012	Mar. 31, 2012
Common Stock	'	'	'	'
Reverse stock split	0.02	'	'	'
Common stock, shares authorized	'	300,000,000	300,000,000	100,000,000
Common stock, par value (in dollars per share)	'	$0.00	'	$0.00
Common stock issued (in shares)	'	1,451,914	'	789,783
Common stock outstanding (in shares)	'	1,451,914	'	789,783
Commitments to issue additional shares of common stock under existing service contracts	'	13,500	'	'
Preferred Stock	'	'	'	'
Preferred stock, shares authorized	'	100,000,000	100,000,000	10,000,000
Preferred stock, par value (in dollars per share)	'	$0.00	'	$0.00
Preferred stock, shares issued	'	0	'	'

Shareholders_Equity_Details_2

Shareholders' Equity (Details 2) (Investor Warrants, USD $)	12 Months Ended	0 Months Ended	12 Months Ended
In Millions, except Share data, unless otherwise specified	Mar. 31, 2013	2-May-13	Mar. 31, 2013	Mar. 31, 2013
		Bridge Loan	Minimum	Maximum
Warrants	'	'	'	'
Warrants issued (in shares)	313,058	134,706	'	'
Exercise price (in dollars per share)	'	'	$150	$212.50
Exercise period	'	'	'1 month 6 days	'6 years 2 months 12 days
Borrowings	'	$5	'	'

Shareholders_Equity_Details_3

Shareholders' Equity (Details 3) (USD $)	32 Months Ended	12 Months Ended				12 Months Ended
	Mar. 31, 2013	Mar. 31, 2013	Aug. 01, 2012	Mar. 31, 2013	Aug. 01, 2012	Mar. 31, 2013	Aug. 01, 2012
		AWP	AWP	Karlsson Group	Karlsson Group	Karlsson Group	Karlsson Group
						AWP	AWP
Non-Controlling Interest	'	'	'	'	'	'	'
Contribution of mineral interests	$11,000,000	'	'	'	'	$11,000,000	'
Percentage of ownership interest held by non-controlling owners	'	'	'	50.00%	50.00%	50.00%	50.00%
Amount of cash contributions made	'	$11,000,000	'	'	'	'	'
Ownership percentage	'	'	50.00%	'	'	'	'

Loss_per_Share_Details

Loss per Share (Details) (USD $)

3 Months Ended

6 Months Ended

9 Months Ended

12 Months Ended

20 Months Ended

23 Months Ended

26 Months Ended

29 Months Ended

32 Months Ended

In Thousands, except Share data, unless otherwise specified

Dec. 31, 2012

Sep. 30, 2012

Jun. 30, 2012

Sep. 30, 2012

Dec. 31, 2012

Mar. 31, 2013

Mar. 31, 2012

Mar. 31, 2012

Jun. 30, 2012

Sep. 30, 2012

Dec. 31, 2012

Mar. 31, 2013

Loss per Share

'

'

'

'

'

'

'

'

'

'

'

'

Net Loss attributable to Prospect Global Resources Inc.

($34,457)

($22,107)

($6,571)

($28,678)

($62,764)

($79,854)

($63,566)

($80,399)

($86,970)

($109,077)

($140,162)

($160,254)

Weighted average number of common shares outstanding - basic

'

'

'

'

'

1,155,000

560,000

'

'

'

'

716,000

Weighted average number of common shares outstanding - fully diluted

'

'

'

'

'

1,155,000

560,000

'

'

'

'

716,000

Loss per share of common stock:

'

'

'

'

'

'

'

'

'

'

'

'

Basic and fully diluted loss per share of common stock (in dollars per share)

($26.50)

($20.21)

($8.32)

($30.41)

($59.32)

($69.14)

[1]

($113.51)

[1]

($174.40)

($172.22)

($189.70)

($218.66)

($223.82)

[1]

Antidilutive potentially dilutive warrants, grants and options which were not included in the computation of Loss Per Share (in share)

'

'

'

'

'

600,000

'

'

'

'

'

'

[1]

All common share amounts and computations using such amounts have been retroactively adjusted to reflect the September?4, 2013 1-for-50 reverse stock split.

Commitments_and_Contingencies_

Commitments and Contingencies (Details) (USD $)

0 Months Ended

12 Months Ended

1 Months Ended

0 Months Ended

12 Months Ended

0 Months Ended

12 Months Ended

0 Months Ended

12 Months Ended

0 Months Ended

12 Months Ended

Jul. 01, 2013

Jun. 14, 2013

Mar. 31, 2013

Nov. 30, 2011

Aug. 01, 2012

Mar. 31, 2013

Apr. 15, 2013

Apr. 15, 2013

Apr. 15, 2013

Mar. 31, 2013

Mar. 07, 2013

Apr. 15, 2013

Mar. 31, 2013

Apr. 15, 2013

Mar. 31, 2013

Aug. 01, 2012

Mar. 31, 2013

Mar. 31, 2013

item

Stockholder claims

Karlsson Group

Karlsson Group

Karlsson Group

Karlsson Group

Karlsson Group

Karlsson Group

Affiliates of Apollo Global Management, LLC

Affiliates of Apollo Global Management, LLC

Buffalo Management Llc

Buffalo Management Llc

AWP

AWP

AWP

AWP

Karlsson Note Amendment

Karlsson Note Amendment

Extension Agreement

Extension Agreement

Apollo Notes

Extension Agreement

Extension Agreement

Karlsson Group

Karlsson Group

Karlsson Group

Karlsson Group

Subsequent Events

Forecast

Subsequent Events

Subsequent Events

Apollo Notes

Maximum

Forecast

Forecast

By August 1, 2014

Subsequent Events

Subsequent Events

Minimum

Subsequent Events

Commitments and Contingencies

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Value of shares purchased by shareholder in public offering

'

'

$66,290,000

$10,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Number of underwriters

'

4

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Royalty as a percentage of gross sales granted

'

'

'

'

2.00%

'

'

'

15.00%

15.00%

'

'

'

'

'

'

15.00%

'

Percentage of ownership interest held by non-controlling owners

'

'

'

'

50.00%

50.00%

'

'

'

'

'

'

'

'

50.00%

50.00%

'

50.00%

Cap amount of royalty granted as a percentage of gross sales

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

75,000,000

'

Principal payments payable expressed as a percentage of gross proceeds

'

'

'

'

'

'

'

'

'

'

'

1.00%

'

'

'

'

'

'

First gross proceeds after which principal payments payable

'

'

'

'

'

'

'

'

'

'

'

10,000,000

'

'

'

'

'

'

Combined cost of gross-up payments

'

'

'

'

'

'

26,300,000

'

'

'

'

'

'

'

'

'

'

'

Capital raising milestones

'

'

'

'

'

'

'

25,000,000

'

'

'

'

'

'

'

'

'

'

Escrow deposit required

'

'

'

'

'

'

9,200,000

'

'

'

'

'

'

'

'

'

'

'

Capital raised, a portion of which is required to be deposited into escrow

'

'

'

'

'

'

30,000,000

'

'

'

'

'

'

'

'

'

'

'

Borrowings

'

'

'

'

'

'

'

'

'

'

$6,800,000

'

'

'

'

'

'

'

Percentage of royalty interest

'

'

'

'

'

1.00%

'

'

2.00%

'

'

'

2.00%

'

'

'

'

'

Percentage of outstanding capital stock issuable to Buffalo

'

'

'

'

'

'

'

'

'

'

'

'

'

10.00%

'

'

'

'

Percentage of equity market capitalization redeemable as consideration

'

'

'

'

'

'

'

'

'

'

'

'

'

10.00%

'

'

'

'

Commitments to issue additional shares of common stock under existing service contracts

'

'

13,500

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Commitments to issue additional warrants under existing service contracts

'

'

1,600

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Commitments to issue additional shares of common stock under existing service contracts due in quarterly increments

'

'

1,500

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Commitments to issue additional warrants under existing service contracts due in monthly tranches

'

'

200

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Period of each warrant tranche

'

'

'5 years

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Commitments to issue additional shares of common stock under existing service contracts, as of the filing date

1,200

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Commitments to issue additional warrants under existing service contracts, as of the filing date

800

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Income_Taxes_Details

Income Taxes (Details) (USD $)	12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Components of income/(loss) from continuing operations before income taxes	'	'
United States	($79,854,000)	($63,566,000)
Total	-79,854,000	-63,566,000
Current deferred tax assets	'	'
Charitable contributions	3,000	'
Accrued bonuses	170,000	'
Accrued severance	138,000	'
Accrued expenses	4,000	10,000
Total current deferred tax assets	315,000	10,000
Non-current deferred tax assets	'	'
Investment in AWP	'	1,085,000
Operating loss carry forward	20,493,000	3,321,000
Start-up costs	100,000	107,000
Stock compensation	7,247,000	3,505,000
Warrant expense	2,161,000	'
Mineral properties	52,625,000	'
Exploration	5,892,000	'
Total non-current deferred tax assets	88,518,000	8,018,000
Valuation allowances	-88,505,000	-7,956,000
Total deferred tax assets	328,000	72,000
Current deferred tax liabilities	'	'
Prepaid expenses	-226,000	-60,000
Total current deferred tax liabilities	-226,000	-60,000
Non-current deferred tax liabilities	'	'
Fixed assets	-102,000	-12,000
Total non-current deferred tax liabilities	-102,000	-12,000
Total deferred tax liability	-328,000	-72,000
Net deferred income tax assets (liabilities)	0	'
Federal	'	'
Income Taxes	'	'
Net operating loss carryforwards	$56,500,000	'

Income_Taxes_Details_2

Income Taxes (Details 2) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2013	Mar. 31, 2012
Income Taxes	'	'
Uncertain tax positions	$0	'
Current portion of income tax expense (benefit)	'	'
U.S. federal	0	'
U.S. state	0	'
Deferred portion of income tax expense (benefit)	'	'
U.S. federal	0	'
U.S. state	0	'
Total income tax expense (benefit)	0	'
U.S. federal rate (as a percent)	-35.00%	'
Reconciliation of the actual income tax benefit (provision) and the tax computed by applying the U.S. federal rate	'	'
Tax benefit from continuing operations	-29,374	-2,214
State tax benefit from continuing operations	-1,008	-63
Non-deductible expenses	384	168
Derivative expense	665	'
Change in valuation allowance	80,549	1,765
Non-controlling interest	1,475	247
AWP step-up	-52,625	'
Other	-66	-97
Total income tax expense (benefit)	$0	'

Subsequent_Events_Details

Subsequent Events (Details) (USD $)

12 Months Ended

12 Months Ended

0 Months Ended

12 Months Ended

0 Months Ended

12 Months Ended

0 Months Ended

1 Months Ended

0 Months Ended

12 Months Ended

0 Months Ended

0 Months Ended

12 Months Ended

12 Months Ended

0 Months Ended

0 Months Ended

Mar. 31, 2013

Mar. 31, 2012

Mar. 31, 2013

Mar. 31, 2013

Mar. 31, 2013

Aug. 01, 2012

Mar. 31, 2013

Mar. 31, 2013

Aug. 01, 2012

Mar. 31, 2013

Mar. 31, 2013

Aug. 01, 2012

2-May-13

Apr. 15, 2013

Nov. 30, 2012

Mar. 07, 2013

Mar. 31, 2013

Apr. 25, 2013

Apr. 23, 2013

Jun. 26, 2013

Jun. 26, 2013

Jun. 26, 2013

Jun. 26, 2013

Apr. 15, 2013

2-May-13

Apr. 15, 2013

Apr. 15, 2013

Mar. 31, 2013

Apr. 15, 2013

Mar. 31, 2013

Apr. 15, 2013

Apr. 15, 2013

Jun. 26, 2013

Apr. 15, 2013

Apr. 15, 2013

Apr. 15, 2013

Jun. 26, 2013

Jun. 26, 2013

Jun. 26, 2013

Apr. 15, 2013

2-May-13

2-May-13

Apr. 15, 2013

Apr. 15, 2013

Apr. 15, 2013

Apr. 15, 2013

Apr. 15, 2013

Apr. 15, 2013

Apr. 15, 2013

Investor Warrants

Investor Warrants

AWP

Karlsson Group

Karlsson Group

Karlsson Group

Karlsson Group

Karlsson Group

Buffalo Management Llc

Buffalo Management Llc

Bridge Loan

Promissory notes

Promissory notes

Apollo Notes

Apollo Notes

Subsequent Events

Subsequent Events

Subsequent Events

Subsequent Events

Subsequent Events

Subsequent Events

Subsequent Events

Subsequent Events

Subsequent Events

Subsequent Events

Subsequent Events

Subsequent Events

Subsequent Events

Subsequent Events

Subsequent Events

Subsequent Events

Subsequent Events

Subsequent Events

Subsequent Events

Subsequent Events

Subsequent Events

Subsequent Events

Subsequent Events

Subsequent Events

Subsequent Events

Subsequent Events

Subsequent Events

Subsequent Events

Subsequent Events

Subsequent Events

Subsequent Events

Subsequent Events

Maximum

Minimum

Investor Warrants

AWP

AWP

Investor Warrants

Karlsson Group

Karlsson Group

Affiliates of Apollo Global Management, LLC

Affiliates of Apollo Global Management, LLC

Public Offering

Investor Warrants

Series A Warrants

Series B Warrants

Karlsson Group

Very Hungry and the Scott Reiman 1991 Trust

First Extension Agreement

First Extension Agreement

First Extension Agreement

First Extension Agreement

First Extension Agreement

First Extension Agreement

First Extension Agreement

First Karlsson Note Amendment

First Karlsson Note Amendment

First Karlsson Note Amendment

First Karlsson Note Amendment

Second Extension Agreement

Second Extension Agreement

Second Extension Agreement

Second Extension Agreement

Bridge Loan

Bridge Loan

Promissory notes

Apollo Notes

Approved Subordinated Debt

Approved Subordinated Debt

Approved Subordinated Debt

Approved Subordinated Debt

Approved Subordinated Debt

Forecast

Public Offering

Public Offering

Public Offering

Investor Warrants

item

Karlsson Group

Karlsson Group

Karlsson Group

Karlsson Group

Karlsson Group

Buffalo Management Llc

Karlsson Group

Karlsson Group

Karlsson Group

Karlsson Group

Karlsson Group

Karlsson Group

Karlsson Group

Buffalo Management Llc

Investor Warrants

Very Hungry and the Scott Reiman 1991 Trust

First Karlsson Note Amendment

First Extension Agreement

First Karlsson Note Amendment

First Karlsson Note Amendment

First Karlsson Note Amendment

First Karlsson Note Amendment

First Karlsson Note Amendment

Investor Warrants

AWP

Prospect Global Resources Inc.

Maximum

Minimum

By August 1, 2014

Minimum

Investor Warrants

Karlsson Group

Affiliates of Apollo Global Management, LLC

Karlsson Group

Karlsson Group

Karlsson Group

Karlsson Group

Karlsson Group

Maximum

Forecast

item

item

Maximum

By May 15, 2013

By June 17, 2013

By September 10, 2013

By August 1, 2014

Forecast

Forecast

Forecast

Forecast

Maximum

Subsequent Events

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Ownership percentage acquired from Karlsson Group

'

'

'

'

'

'

'

'

50.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Number of debt instruments restructured

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2

'

'

'

'

'

Aggregate principal amount of restructured debt

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$6,800,000

'

'

'

'

'

Tax gross-up

6,226,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

26,300,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Tax gross-up, including amounts owed prior to amendment

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

20,100,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Term of debt instrument from completion of Definitive Feasibility Study

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'12 months

'

'

'

'

'

'

Interim principal payment

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

30,000,000

'

'

'

'

'

'

Term of interim principal payment from completion of Definitive Feasibility Study

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'6 months

'

'

'

'

'

'

Principal payments payable expressed as percentage of net proceeds

40.00%

'

'

'

'

'

'

'

'

'

'

'

'

40.00%

40.00%

'

33.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Principal payments payable expressed as a percentage of gross proceeds

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1.00%

'

'

'

'

'

First gross proceeds after which principal payments payable

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

10,000,000

'

'

'

'

'

Interest rate (as a percent)

'

'

'

'

'

'

'

'

'

'

'

'

'

9.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0.00%

9.00%

'

'

'

'

'

'

Interest accrual method

'

'

'

'

'

'

'

'

'

'

'

'

'

'Simple

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'Compounding

'

'

'

'

'

'

Capital raising milestones

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

25,000,000

'

'

'

'

'

'

'

'

'

5,000,000

7,000,000

18,000,000

15,000,000

Escrow deposit required

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

9,200,000

'

'

12,000,000

'

'

'

'

'

'

'

'

'

'

'

'

Capital raised, a portion of which is required to be deposited into escrow

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

30,000,000

'

'

24,000,000

'

'

'

'

'

'

'

'

'

'

'

'

Additional borrowings allowed before the First Payment Date

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

10,000,000

'

'

'

'

Additional borrowings allowed after the First Payment Date

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1,000,000

'

'

'

'

Cure period for payment default

'

'

'

'

'

'

'

'

'

'

'

'

'

'15 days

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Cure period for non-payment default

'

'

'

'

'

'

'

'

'

'

'

'

'

'30 days

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Cure and notice period for non-monetary defaults

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'10 days

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Capital requirement for assignment of debt

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

30,000,000

'

30,000,000

'

'

'

'

'

'

'

'

'

'

'

'

Percentage of royalty interest

'

'

'

'

'

'

1.00%

'

'

'

2.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2.00%

'

'

'

'

'

'

'

'

'

'

'

'

1.00%

'

'

'

'

'

'

'

'

'

Royalty cap eliminated

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

75,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Number of common stock that can be purchased against warrants (in shares)

'

'

'

'

'

'

'

'

'

'

'

52,409

'

'

'

'

'

'

'

'

'

833,334

833,334

'

'

'

'

'

112,117

'

'

'

'

'

'

'

'

'

60,000

'

'

'

'

'

'

'

'

'

'

Exercise price (in dollars per share)

'

'

$212.50

$150

'

'

'

$212.50

'

'

'

$130

'

'

'

'

'

'

'

'

'

$6

$6

$12.50

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$6

'

$15

$15

'

'

'

'

'

'

'

Legal fees and expenses reimbursed

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

125,000

'

'

'

'

'

'

'

'

'

'

'

'

Percentage of membership interests pledged for debt

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

100.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Percentage of ownership interest held

'

'

'

'

100.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

100.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Royalty as a percentage of gross sales granted

'

'

'

'

'

2.00%

'

'

'

15.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

15.00%

15.00%

'

'

'

'

'

'

'

'

15.00%

'

'

'

'

'

'

'

'

'

'

'

'

Extension term of royalty granted as a percentage of gross sales

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'1 year

'

'

'

'

'

'

'

'

'

'6 months

'

'

'

'

'

'

'

'

'

'

'

'

Attorneys' fees and costs associated with consummation of the Extension Agreement and related agreements payable

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

275,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Interim principal payment eliminated

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

30,000,000

'

'

'

'

'

'

'

'

'

'

'

'

Percentage of additional proceeds required to place in escrow

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0.5

'

'

'

'

'

'

'

'

'

'

'

'

Proceeds from public offering placed into escrow

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2,100,000

'

'

'

2,000,000

'

'

'

'

'

'

'

'

'

'

'

'

Proceeds from public offering

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

5,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

5,000,000

'

'

'

'

'

'

'

'

'

'

'

'

Remaining escrow obligation

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

10,000,000

'

'

'

'

'

'

'

'

'

'

'

'

Number of wells on which the complete total depth milestone is required

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

8

'

'

'

'

'

'

'

'

'

'

'

Exercise period

'

'

'6 years 2 months 12 days

'1 month 6 days

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'5 years

'

'

'

'

'

'

'

'

'

'

Percentage of outstanding capital stock issuable to Buffalo

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

10.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Percentage of equity market capitalization redeemable as consideration

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

10.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Number of consecutive business days for which the bid price of common stock closed below the minimum $1.00 per share requirement

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'30 days

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Bid price per share amount required for continued inclusion on the Nasdaq Capital Market based in Listing Rule (in dollar per share)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$1

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Number of calendar days to regain compliance rules related to minimum bid price per share

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'180 days

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Market value required for continued inclusion on the Nasdaq Capital Market based on Listing Rule

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

35,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Number of consecutive business days for which the market value of listed securities has fallen below the $35 million minimum requirement for continued listing

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'30 days

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Number of calendar days to regain compliance rules related to minimum market value

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'180 days

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Proceeds from debt

'

'

'

'

'

'

'

'

'

'

'

'

5,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

5,000,000

'

'

'

'

'

'

'

Amount of unsecured subordinated promissory notes exchanged

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$6,800,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$5,500,000

'

'

'

'

'

'

'

Number of related parties that entity borrowed from

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Units issued in public offering

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

833,334

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Common stock issued in public offerings (in shares)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

833,334

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Common stock, par value (in dollars per share)

$0.00

$0.00

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$0.00

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Public offering price in an underwritten public offering (in dollars per share)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$6

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Number of warrants under an option exercised by the underwriter

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

23,464

1

1

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Exercise price under an option exercised by the underwriter (in dollars per share)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$0.01

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Restatement_Details

Restatement (Details) (USD $)	0 Months Ended	3 Months Ended			6 Months Ended	8 Months Ended	9 Months Ended	12 Months Ended				20 Months Ended		23 Months Ended	26 Months Ended	29 Months Ended	32 Months Ended
	Sep. 04, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Sep. 30, 2012	Mar. 31, 2011	Dec. 31, 2012	Mar. 31, 2013		Mar. 31, 2012		Mar. 31, 2012		Jun. 30, 2012	Sep. 30, 2012	Dec. 31, 2012	Mar. 31, 2013
Restatement	'	'	'	'	'	'	'	'		'		'		'	'	'	'
Reverse stock split	0.02	'	'	'	'	'	'	'		'		'		'	'	'	'
ASSETS	'	'	'	'	'	'	'	'		'		'		'	'	'	'
Mineral properties	'	$12,190,000	$12,190,000	$12,190,000	$12,190,000	'	$12,190,000	$13,690,000		$12,091,000		$12,091,000		$12,190,000	$12,190,000	$12,190,000	$13,690,000
Total noncurrent assets	'	12,963,000	12,792,000	12,494,000	12,792,000	'	12,963,000	14,787,000		12,253,000		12,253,000		12,494,000	12,792,000	12,963,000	14,787,000
Total assets	'	23,750,000	24,758,000	14,194,000	24,758,000	'	23,750,000	17,007,000		24,407,000		24,407,000		14,194,000	24,758,000	23,750,000	17,007,000
SHAREHOLDER'S DEFICIT	'	'	'	'	'	'	'	'		'		'		'	'	'	'
Common stock	'	1,000	'	'	'	'	1,000	1,000	[1]	'		'		'	'	1,000	1,000	[1]
Additional paid-in capital	'	29,219,000	-3,416,000	86,758,000	-3,416,000	'	29,219,000	30,335,000	[1]	91,997,000	[1]	91,997,000	[1]	86,758,000	-3,416,000	29,219,000	30,335,000	[1]
Losses accumulated in exploration stage	'	-143,163,000	-109,077,000	-86,971,000	-109,077,000	'	-143,163,000	-160,254,000	[1]	-80,400,000	[1]	-80,400,000	[1]	-86,971,000	-109,077,000	-143,163,000	-160,254,000	[1]
Total shareholder's deficit - Prospect Global Resources, Inc.	'	-113,944,000	-112,492,000	789,000	-112,492,000	'	-113,944,000	-129,918,000	[1]	11,597,000	[1]	11,597,000	[1]	789,000	-112,492,000	-113,944,000	-129,918,000	[1]
Non-controlling interest	'	'	'	3,976,000	'	'	'	'		7,234,000	[1]	7,234,000	[1]	3,976,000	'	'	'
Total shareholder's equity	'	-113,944,000	-112,492,000	4,765,000	-112,492,000	-4,762,000	-113,944,000	-129,918,000	[1]	18,831,000	[1]	18,831,000	[1]	4,765,000	-112,492,000	-113,944,000	-129,918,000	[1]
Total liabilities and shareholder's deficit	'	23,750,000	24,758,000	14,194,000	24,758,000	'	23,750,000	17,007,000	[1]	24,407,000	[1]	24,407,000	[1]	14,194,000	24,758,000	23,750,000	17,007,000	[1]
Consolidated Statement of Operations	'	'	'	'	'	'	'	'		'		'		'	'	'	'
Exploration	'	5,646,000	5,802,000	5,568,000	11,370,000	'	17,016,000	18,575,000		6,002,000		6,648,000		12,216,000	18,018,000	23,664,000	25,223,000
General and administrative	'	16,047,000	15,247,000	4,260,000	19,507,000	'	35,554,000	48,458,000		17,206,000		18,693,000		22,953,000	38,199,000	54,246,000	67,151,000
Off-take arrangement fee	'	7,751,000	'	'	'	'	7,751,000	7,751,000		'		'		'	'	7,751,000	7,751,000
Total expenses	'	29,444,000	21,049,000	9,828,000	30,877,000	'	60,321,000	74,784,000		23,208,000		25,341,000		35,169,000	56,217,000	85,661,000	100,125,000
Loss from operations	'	-29,444,000	-21,049,000	-9,828,000	-30,877,000	'	-60,321,000	-74,784,000		-23,208,000		-25,341,000		-35,169,000	-56,217,000	-85,661,000	-100,125,000
Net loss	'	-34,085,000	-22,920,000	-9,828,000	-32,748,000	-17,209,000	-66,833,000	-83,925,000		-66,957,000		-84,166,000		-93,994,000	-116,914,000	-150,999,000	-168,091,000
Net loss attributable to non-controlling interest	'	'	813,000	3,257,000	4,070,000	'	4,069,000	4,071,000		3,391,000		3,767,000		7,024,000	7,837,000	7,837,000	7,837,000
Net loss attributable to Prospect Global Resources Inc.	'	-34,457,000	-22,107,000	-6,571,000	-28,678,000	'	-62,764,000	-79,854,000		-63,566,000		-80,399,000		-86,970,000	-109,077,000	-140,162,000	-160,254,000
Loss per share (in dollars per share)	'	($26.50)	($20.21)	($8.32)	($30.41)	'	($59.32)	($69.14)	[1]	($113.51)	[1]	($174.40)		($172.22)	($189.70)	($218.66)	($223.82)	[1]
Operating activities:	'	'	'	'	'	'	'	'		'		'		'	'	'	'
Net loss	'	-34,085,000	-22,920,000	-9,828,000	-32,748,000	-17,209,000	-66,833,000	-83,925,000		-66,957,000		-84,166,000		-93,994,000	-116,914,000	-150,999,000	-168,091,000
Services paid for with securities	'	'	'	'	'	'	4,547,000	4,653,000		2,064,000		'		'	'	6,928,000	7,033,000
Stock based compensation	'	'	'	'	10,682,000	'	15,227,000	16,239,000		9,717,000		'		'	20,400,000	24,945,000	25,957,000
Accounts payable	'	'	'	2,156,000	2,099,000	'	1,418,000	2,179,000		70,000		'		2,829,000	2,771,000	2,090,000	2,850,000
Accrued liabilities	'	'	'	1,346,000	2,660,000	'	4,561,000	3,663,000		770,000		857,000		2,203,000	3,516,000	5,417,000	4,518,000
Net cash used in operating activities	'	'	'	-5,769,000	-14,706,000	'	-28,091,000	-34,823,000		-11,349,000		-12,618,000		-17,887,000	-27,323,000	-40,708,000	-47,443,000
Investing activities:	'	'	'	'	'	'	'	'		'		'		'	'	'	'
Mineral properties	'	'	'	-98,000	-98,000	'	-98,000	-1,599,000		-1,043,000		-1,091,000		-1,189,000	-1,189,000	-1,190,000	-2,690,000
Net cash used in investing activities	'	'	'	-5,247,000	-494,000	'	-740,000	-2,618,000		-1,124,000		-1,180,000		-6,928,000	-1,674,000	-1,921,000	-3,796,000
As Reported	'	'	'	'	'	'	'	'		'		'		'	'	'	'
ASSETS	'	'	'	'	'	'	'	'		'		'		'	'	'	'
Mineral properties	'	35,991,000	29,036,000	20,067,000	29,036,000	'	35,991,000	39,994,000		13,468,000		13,468,000		20,067,000	29,036,000	35,991,000	39,994,000
Deferred fees	'	7,751,000	'	'	'	'	7,751,000	7,751,000		'		'		'	'	7,751,000	7,751,000
Total noncurrent assets	'	44,517,000	29,638,000	20,371,000	29,638,000	'	44,517,000	48,842,000		13,630,000		13,630,000		20,371,000	29,638,000	44,517,000	48,842,000
Total assets	'	55,304,000	41,604,000	22,071,000	41,604,000	'	55,304,000	51,062,000		25,784,000		25,784,000		22,071,000	41,604,000	55,304,000	51,062,000
SHAREHOLDER'S DEFICIT	'	'	'	'	'	'	'	'		'		'		'	'	'	'
Common stock	'	73,000	55,000	39,000	55,000	'	73,000	73,000		40,000		40,000		39,000	55,000	73,000	73,000
Additional paid-in capital	'	34,265,000	1,275,000	86,719,000	1,275,000	'	34,265,000	35,641,000		91,957,000		91,957,000		86,719,000	1,275,000	34,265,000	35,641,000
Losses accumulated in exploration stage	'	-116,727,000	-96,977,000	-83,032,000	-96,977,000	'	-116,727,000	-131,577,000		-79,711,000		-79,711,000		-83,032,000	-96,977,000	-116,727,000	-131,577,000
Total shareholder's deficit - Prospect Global Resources, Inc.	'	-82,390,000	-95,646,000	4,727,000	-95,646,000	'	-82,390,000	-95,863,000		12,285,000		12,285,000		4,727,000	-95,646,000	-82,390,000	-95,863,000
Non-controlling interest	'	'	'	7,915,000	'	'	'	'		7,923,000		7,923,000		7,915,000	'	'	'
Total shareholder's equity	'	-82,390,000	-95,646,000	12,642,000	-95,646,000	'	-82,390,000	'		20,208,000		20,208,000		12,642,000	-95,646,000	-82,390,000	'
Total liabilities and shareholder's deficit	'	55,304,000	41,604,000	22,071,000	41,604,000	'	55,304,000	51,062,000		25,784,000		25,784,000		22,071,000	41,604,000	55,304,000	51,062,000
Consolidated Statement of Operations	'	'	'	'	'	'	'	'		'		'		'	'	'	'
Exploration	'	'	'	'	'	'	'	'		4,954,000		5,600,000		5,600,000	5,600,000	5,600,000	5,600,000
General and administrative	'	15,110,000	12,080,000	3,328,000	15,408,000	'	30,518,000	42,737,000		16,877,000		18,364,000		21,692,000	33,771,000	48,881,000	61,102,000
Total expenses	'	15,110,000	12,080,000	3,328,000	15,408,000	'	30,518,000	42,737,000		21,831,000		23,964,000		27,292,000	39,371,000	54,481,000	66,702,000
Loss from operations	'	-15,110,000	-12,080,000	-3,328,000	-15,408,000	'	-30,518,000	-42,737,000		-21,831,000		-23,964,000		-27,292,000	-39,371,000	-54,481,000	-66,702,000
Net loss	'	-19,751,000	-13,951,000	-3,328,000	-17,279,000	'	-37,030,000	-51,878,000		-65,580,000		-82,789,000		-86,117,000	-100,068,000	-119,819,000	-134,668,000
Net loss attributable to non-controlling interest	'	'	6,000	7,000	13,000	'	12,000	12,000		2,702,000		3,078,000		3,085,000	3,091,000	3,091,000	3,090,000
Net loss attributable to Prospect Global Resources Inc.	'	-19,751,000	-13,945,000	-3,321,000	-17,266,000	'	-37,018,000	-51,866,000		-62,878,000		-79,711,000		-83,032,000	-96,977,000	-116,728,000	-131,578,000
Loss per share (in dollars per share)	'	($15.36)	($12.75)	($4.20)	($18.31)	'	($34.99)	$44.91		($112.28)		($172.91)		($164.42)	($168.66)	($182.10)	($183.77)
Operating activities:	'	'	'	'	'	'	'	'		'		'		'	'	'	'
Net loss	'	-19,751,000	-13,951,000	-3,328,000	-17,279,000	'	-37,030,000	-51,878,000		-65,580,000		-82,789,000		-86,117,000	-100,068,000	-119,819,000	-134,668,000
Services paid for with securities	'	'	'	'	'	'	672,000	776,000		'		'		'	'	3,052,000	3,156,000
Stock based compensation	'	'	'	'	8,228,000	'	12,649,000	13,794,000		'		'		'	17,946,000	22,367,000	23,512,000
Deferred fees	'	'	'	'	'	'	-1,938,000	-2,287,000		'		'		'	'	-1,938,000	-2,288,000
Accounts payable	'	'	'	434,000	-249,000	'	-1,773,000	497,000		'		'		1,106,000	423,000	-1,101,000	1,169,000
Accrued liabilities	'	'	'	258,000	980,000	'	1,781,000	-915,000		299,000		386,000		644,000	1,365,000	2,165,000	-531,000
Net cash used in operating activities	'	'	'	-2,079,000	-5,719,000	'	-12,650,000	-17,645,000		-10,443,000		-11,712,000		-13,292,000	-17,430,000	-24,363,000	-29,360,000
Investing activities:	'	'	'	'	'	'	'	'		'		'		'	'	'	'
Mineral properties	'	'	'	-3,788,000	-9,085,000	'	-15,539,000	-18,777,000		-1,949,000		-1,997,000		-5,784,000	-11,082,000	-17,535,000	-20,773,000
Net cash used in investing activities	'	'	'	-8,937,000	-9,481,000	'	-16,181,000	-19,796,000		-2,030,000		-2,086,000		-11,523,000	-11,567,000	-18,266,000	-21,879,000
Previously capitalized costs | As Reported	'	'	'	'	'	'	'	'		'		'		'	'	'	'
ASSETS	'	'	'	'	'	'	'	'		'		'		'	'	'	'
Reduction in general and administrative expenses	'	'	'	'	'	'	400,000	'		'		'		'	'	'	'
Investing activities:	'	'	'	'	'	'	'	'		'		'		'	'	'	'
Expense reduction in general and administrative expenses for unvested forfeited stock options.	'	'	'	'	'	'	29,800,000	'		'		'		'	'	'	'
Previously capitalized costs | Adjustment	'	'	'	'	'	'	'	'		'		'		'	'	'	'
ASSETS	'	'	'	'	'	'	'	'		'		'		'	'	'	'
Mineral properties	'	-23,801,000	-16,846,000	-7,877,000	-16,846,000	'	-23,801,000	-26,304,000		-1,377,000		-1,377,000		-7,877,000	-16,846,000	-23,801,000	-26,304,000
Deferred fees	'	-7,751,000	'	'	'	'	-7,751,000	-7,751,000		'		'		'	'	-7,751,000	-7,751,000
Reduction in general and administrative expenses	'	'	'	'	'	'	'	'		'		'		'	'	'	'
Total noncurrent assets	'	-31,554,000	-16,846,000	-7,877,000	-16,846,000	'	-31,554,000	-34,055,000		-1,377,000		-1,377,000		-7,877,000	-16,846,000	-31,554,000	-34,055,000
Total assets	'	-31,554,000	-16,846,000	-7,877,000	-16,846,000	'	-31,554,000	-34,055,000		-1,377,000		-1,377,000		-7,877,000	-16,846,000	-31,554,000	-34,055,000
SHAREHOLDER'S DEFICIT	'	'	'	'	'	'	'	'		'		'		'	'	'	'
Common stock	'	-72,000	-55,000	-39,000	-55,000	'	-72,000	-72,000		-40,000		-40,000		-39,000	-55,000	-72,000	-72,000
Additional paid-in capital	'	-5,046,000	-4,691,000	39,000	-4,691,000	'	-5,046,000	-5,306,000		40,000		40,000		39,000	-4,691,000	-5,046,000	-5,306,000
Losses accumulated in exploration stage	'	-26,436,000	-12,100,000	-3,939,000	-12,100,000	'	-26,436,000	-28,677,000		-688,000		-688,000		-3,939,000	-12,100,000	-26,436,000	-28,677,000
Total shareholder's deficit - Prospect Global Resources, Inc.	'	-31,554,000	-16,846,000	-3,938,000	-16,846,000	'	-31,554,000	-34,055,000		-688,000		-688,000		-3,938,000	-16,846,000	-31,554,000	-34,055,000
Non-controlling interest	'	'	'	-3,939,000	'	'	'	'		-689,000		-689,000		-3,939,000	'	'	'
Total shareholder's equity	'	-31,554,000	-16,846,000	-7,877,000	-16,846,000	'	-31,554,000	'		-1,377,000		-1,377,000		-7,877,000	-16,846,000	-31,554,000	'
Total liabilities and shareholder's deficit	'	-31,554,000	-16,846,000	-7,877,000	-16,846,000	'	-31,554,000	-34,055,000		-1,377,000		-1,377,000		-7,877,000	-16,846,000	-31,554,000	-34,055,000
Consolidated Statement of Operations	'	'	'	'	'	'	'	'		'		'		'	'	'	'
Exploration	'	5,646,000	5,802,000	5,568,000	11,370,000	'	17,016,000	18,575,000		1,048,000		1,048,000		6,616,000	12,418,000	18,064,000	19,623,000
General and administrative	'	937,000	3,167,000	932,000	4,099,000	'	5,036,000	5,721,000		329,000		329,000		1,261,000	4,428,000	5,365,000	6,049,000
Off-take arrangement fee	'	7,751,000	'	'	'	'	7,751,000	7,751,000		'		'		'	'	7,751,000	7,751,000
Total expenses	'	14,334,000	8,969,000	6,500,000	15,469,000	'	29,803,000	32,047,000		1,377,000		1,377,000		7,877,000	16,846,000	31,180,000	33,423,000
Loss from operations	'	-14,334,000	-8,969,000	-6,500,000	-15,469,000	'	-29,803,000	-32,047,000		-1,377,000		-1,377,000		-7,877,000	-16,846,000	-31,180,000	-33,423,000
Net loss	'	-14,334,000	-8,969,000	-6,500,000	-15,469,000	'	-29,803,000	-32,047,000		-1,377,000		-1,377,000		-7,877,000	-16,846,000	-31,180,000	-33,423,000
Net loss attributable to non-controlling interest	'	'	807,000	3,250,000	4,057,000	'	4,057,000	4,059,000		689,000		689,000		3,939,000	4,746,000	4,746,000	4,747,000
Net loss attributable to Prospect Global Resources Inc.	'	-14,334,000	-8,162,000	-3,250,000	-11,412,000	'	-25,746,000	-27,988,000		-688,000		-688,000		-3,938,000	-12,100,000	-23,434,000	-28,676,000
Loss per share (in dollars per share)	'	($11.14)	($7.46)	($4.12)	($12.10)	'	($24.33)	$24.23		($1.23)		($1.49)		($7.80)	($21.04)	($36.56)	($40.05)
Operating activities:	'	'	'	'	'	'	'	'		'		'		'	'	'	'
Net loss	'	-14,334,000	-8,969,000	-6,500,000	-15,469,000	'	-29,803,000	-32,047,000		-1,377,000		-1,377,000		-7,877,000	-16,846,000	-31,180,000	-33,423,000
Services paid for with securities	'	'	'	'	'	'	3,875,000	3,877,000		'		'		'	'	3,876,000	3,877,000
Stock based compensation	'	'	'	'	2,454,000	'	2,578,000	2,445,000		'		'		'	2,454,000	2,578,000	2,445,000
Deferred fees	'	'	'	'	'	'	1,938,000	2,287,000		'		'		'	'	1,938,000	2,288,000
Accounts payable	'	'	'	1,722,000	2,348,000	'	3,191,000	1,682,000		'		'		1,723,000	2,348,000	3,191,000	1,681,000
Accrued liabilities	'	'	'	1,088,000	1,680,000	'	2,780,000	4,578,000		471,000		471,000		1,559,000	2,151,000	3,252,000	5,049,000
Net cash used in operating activities	'	'	'	-3,690,000	-8,987,000	'	-15,441,000	-17,178,000		-906,000		-906,000		-4,595,000	-9,893,000	-16,345,000	-18,083,000
Investing activities:	'	'	'	'	'	'	'	'		'		'		'	'	'	'
Mineral properties	'	'	'	3,690,000	8,987,000	'	15,441,000	17,178,000		906,000		906,000		4,595,000	9,893,000	16,345,000	18,083,000
Net cash used in investing activities	'	'	'	$3,690,000	$8,987,000	'	$15,441,000	$17,178,000		$906,000		$906,000		$4,595,000	$9,893,000	$16,345,000	$18,083,000
[1]	All common share amounts and computations using such amounts have been retroactively adjusted to reflect the September?4, 2013 1-for-50 reverse stock split.