$EPM
EVOLUTION PETROLEUM CORP Stock $epm

$epm Overview Financials Valuation SEC Filings Company Website

2012 Q2 Form 10-K Financial Statement

#000110465912063322 Filed on September 13, 2012

Income Statement

Concept	2012 Q2	2011 Q2	2010
Revenue	$4.582M	$3.170M	$5.022M
YoY Change	44.54%	133.09%	-17.67%
Cost Of Revenue	$450.0K	$370.0K	$1.670M
YoY Change	21.62%	-24.49%	15.97%
Gross Profit	$4.130M	$2.790M	$3.360M
YoY Change	48.03%	220.69%	-27.74%
Gross Profit Margin	90.14%	88.01%	66.91%
Selling, General & Admin	$1.340M	$970.0K	$2.940M
YoY Change	38.14%	125.58%	-15.76%
% of Gross Profit	32.45%	34.77%	87.5%
Research & Development	$350.0K	$390.0K	$2.150M
YoY Change	-10.26%	-59.38%	-10.79%
% of Gross Profit	8.47%	13.98%	63.99%
Depreciation & Amortization	$310.0K	$200.0K	$1.818M
YoY Change	55.0%	33.33%	-26.09%
% of Gross Profit	7.51%	7.17%	54.11%
Operating Expenses	$2.010M	$1.580M	$8.636M
YoY Change	27.22%	1.94%	2.82%
Operating Profit	$2.120M	$1.210M	-$3.615M
YoY Change	75.22%	-277.94%	-3.61%
Interest Expense	$10.00K	$0.00	$60.00K
YoY Change		-100.0%	-50.0%
% of Operating Profit	0.47%	0.0%
Other Income/Expense, Net	-$20.00K
YoY Change
Pretax Income	$2.110M	$1.210M	-$3.560M
YoY Change	74.38%	-277.94%	-1.67%
Income Tax	$1.010M	$680.0K	-$1.172M
% Of Pretax Income	47.87%	56.2%
Net Earnings	$1.100M	$530.0K	-$2.388M
YoY Change	107.55%	-223.26%	-8.17%
Net Earnings / Revenue	24.01%	16.72%	-47.55%
Basic Earnings Per Share	$0.03		-$0.09
Diluted Earnings Per Share	$0.03	$17.05K	-$0.09
COMMON SHARES
Basic Shares Outstanding	27.82M shares		27.00M shares
Diluted Shares Outstanding			27.00M shares

Balance Sheet

Concept	2012 Q2	2011 Q2	2010
SHORT-TERM ASSETS
Cash & Short-Term Investments	$14.68M	$4.500M	$4.490M
YoY Change	226.22%	0.22%	-24.54%
Cash & Equivalents	$14.43M	$4.247M	$3.140M
Short-Term Investments	$250.0K	$250.0K	$1.350M
Other Short-Term Assets	$560.0K	$190.0K	$320.0K
YoY Change	194.74%	-40.63%	100.0%
Inventory
Prepaid Expenses
Receivables	$1.340M	$1.560M	$540.0K
Other Receivables	$190.00	$167.00	$890.0K
Total Short-Term Assets	$16.77M	$6.358M	$6.230M
YoY Change	163.77%	2.05%	-29.76%
LONG-TERM ASSETS
Property, Plant & Equipment	$40.57M	$33.52M	$30.91M
YoY Change	21.04%	8.43%	6.96%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets	$250.3K	$77.29K	$60.00K
YoY Change	223.9%	28.81%	20.0%
Total Long-Term Assets	$42.19M	$33.59M	$30.97M
YoY Change	25.57%	8.47%	6.94%
TOTAL ASSETS
Total Short-Term Assets	$16.77M	$6.358M	$6.230M
Total Long-Term Assets	$42.19M	$33.59M	$30.97M
Total Assets	$58.96M	$39.95M	$37.20M
YoY Change	47.57%	7.4%	-1.67%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$407.6K	$514.2K	$680.0K
YoY Change	-20.73%	-24.39%	-1.45%
Accrued Expenses	$4.220M	$790.0K	$80.00K
YoY Change	434.18%	887.5%	14.29%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$5.089M	$2.212M	$1.290M
YoY Change	130.07%	71.47%	4.03%
LONG-TERM LIABILITIES
Long-Term Debt	$0.00	$0.00	$0.00
YoY Change
Other Long-Term Liabilities	$1.040M	$950.0K	$890.0K
YoY Change	9.47%	-35.81%	20.27%
Total Long-Term Liabilities	$1.040M	$950.0K	$890.0K
YoY Change	9.47%	-35.81%	20.27%
TOTAL LIABILITIES
Total Short-Term Liabilities	$5.089M	$2.212M	$1.290M
Total Long-Term Liabilities	$1.040M	$950.0K	$890.0K
Total Liabilities	$12.33M	$6.487M	$5.130M
YoY Change	90.11%	13.41%	-10.0%
SHAREHOLDERS EQUITY
Retained Earnings	$18.06M	$13.56M
YoY Change	33.21%
Common Stock	$29.45M	$20.79M
YoY Change	41.64%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$882.0K	$882.0K
YoY Change	0.0%
Treasury Stock Shares	788.2K shares	788.2K shares
Shareholders Equity	$46.62M	$33.46M	$32.06M
YoY Change
Total Liabilities & Shareholders Equity	$58.96M	$39.95M	$37.20M
YoY Change	47.57%	7.4%	-1.67%

Cashflow Statement

Concept	2012 Q2	2011 Q2	2010
OPERATING ACTIVITIES
Net Income	$1.100M	$530.0K	-$2.388M
YoY Change	107.55%	-223.26%	-8.17%
Depreciation, Depletion And Amortization	$310.0K	$200.0K	$1.818M
YoY Change	55.0%	33.33%	-26.09%
Cash From Operating Activities	$3.050M	$1.520M	$2.350M
YoY Change	100.66%	985.71%	-60.5%
INVESTING ACTIVITIES
Capital Expenditures	-$1.090M	-$190.0K	-$3.800M
YoY Change	473.68%	-94.74%	-64.49%
Acquisitions
YoY Change
Other Investing Activities	-$2.830M	-$220.0K	$13.22K
YoY Change	1186.36%	-107.94%	-100.75%
Cash From Investing Activities	-$3.920M	-$400.0K	-$3.100M
YoY Change	880.0%	-52.94%	-75.12%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	80.00K	170.0K	0.000
YoY Change	-52.94%		-100.0%
NET CHANGE
Cash From Operating Activities	3.050M	1.520M	2.350M
Cash From Investing Activities	-3.920M	-400.0K	-3.100M
Cash From Financing Activities	80.00K	170.0K	0.000
Net Change In Cash	-790.0K	1.290M	-750.0K
YoY Change	-161.24%	-281.69%	-89.85%
FREE CASH FLOW
Cash From Operating Activities	$3.050M	$1.520M	$2.350M
Capital Expenditures	-$1.090M	-$190.0K	-$3.800M
Free Cash Flow	$4.140M	$1.710M	$6.150M
YoY Change	142.11%	-54.4%	-63.06%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2012Q2	us-gaap	Oil And Gas Property Full Cost Method Net OilAndGasPropertyFullCostMethodNet	40476172	USD
CY2012Q2	us-gaap	Oil And Gas Property Full Cost Method Depletion OilAndGasPropertyFullCostMethodDepletion	6440166	USD
CY2012Q2	us-gaap	Oil And Gas Property Full Cost Method Gross OilAndGasPropertyFullCostMethodGross	40874244	USD
CY2011Q2	us-gaap	Property Plant And Equipment Other Accumulated Depreciation PropertyPlantAndEquipmentOtherAccumulatedDepreciation	192078	USD
CY2011Q2	us-gaap	Oil And Gas Property Full Cost Method Net OilAndGasPropertyFullCostMethodNet	33447564	USD
CY2011Q2	us-gaap	Oil And Gas Property Full Cost Method Depletion OilAndGasPropertyFullCostMethodDepletion	5353152	USD
CY2011Q2	us-gaap	Oil And Gas Property Full Cost Method Gross OilAndGasPropertyFullCostMethodGross	35860517	USD
CY2012Q2	us-gaap	Property Plant And Equipment Other Accumulated Depreciation PropertyPlantAndEquipmentOtherAccumulatedDepreciation	230243	USD
CY2012Q2	us-gaap	Property Plant And Equipment Other PropertyPlantAndEquipmentOther	322514	USD
CY2012Q2	epm	Oil And Natural Gas Properties Excluded From Amortization Acquisition And Other Costs OilAndNaturalGasPropertiesExcludedFromAmortizationAcquisitionAndOtherCosts	6042094	USD
CY2012	epm	Capitalized Costs Of Unproved Properties Excluded From Amortization Acquisition And Other Period Cost CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationAcquisitionAndOtherPeriodCost	6042094	USD
CY2012Q2	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	968677	USD
CY2010Q2	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	811635	USD
CY2012	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	61936	USD
CY2011	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	-25115	USD
CY2012	us-gaap	Use Of Estimates UseOfEstimates	<table style="font-size:10pt; font-family:'Times New Roman',times,serif;"> <tr> <td> <p style="MARGIN: 0in 0in 0pt"><font style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman" size="2"> </font></p> <p style="MARGIN: 0in 0in 0pt"><b><i><font style="FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-STYLE: italic; FONT-FAMILY: Times New Roman" size="2">Use of Estimates.  </font></i></b><font style="FONT-SIZE: 10pt" size="2">The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America (“GAAP”) requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities at the dates of the financial statements and the reported amounts of revenues and expenses during the reporting periods.  Significant estimates include reserve quantities and estimated future cash flows associated with proved reserves, which significantly impact depletion expense and potential impairments of oil and natural gas properties, income taxes and the valuation of deferred tax assets, stock-based compensation and commitments and contingencies.  We analyze our estimates based on historical experience and various other assumptions that we believe to be reasonable. While we believe that our estimates and assumptions used in preparation of the consolidated financial statements are appropriate, actual results could differ from those estimates.</font></p> <p style="MARGIN: 0in 0in 0pt"><font style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman" size="2"> </font></p></td></tr></table>
CY2011	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	77168	USD
CY2010	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	87846	USD
CY2012	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	84738	USD
CY2011Q2	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	859586	USD
CY2011	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	1847	USD
CY2012	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	-82421	USD
CY2012	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	77505	USD
CY2012	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	175943	USD
CY2011	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	59913	USD
CY2011	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	15000	USD
CY2012	us-gaap	Income Taxes Paid IncomeTaxesPaid	895000	USD
CY2011	us-gaap	Income Taxes Paid IncomeTaxesPaid	229802	USD
CY2010	us-gaap	Income Taxes Paid IncomeTaxesPaid	329800	USD
CY2012	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	3825631	shares
CY2012	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	3762312	shares
CY2012	epm	Incremental Common Shares Attributable To Common Stock Warrants Issued In Equity And Financing Transactions IncrementalCommonSharesAttributableToCommonStockWarrantsIssuedInEquityAndFinancingTransactions	63319	shares
CY2011	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.01
CY2011	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.01
CY2011	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	27437496	shares
CY2011	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	27437496	shares
CY2011	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-241553	USD
CY2010	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	27004066	shares
CY2010	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	27004066	shares
CY2010	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-2387707	USD
CY2012	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.14
CY2012	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.16
CY2012	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	31609929	shares
CY2012	epm	Antidilutive Securities Excluded From Computation Of Earnings Per Share Weighted Average Exercise Price AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareWeightedAverageExercisePrice	1.83
CY2012	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	5486985	shares
CY2011	epm	Antidilutive Securities Excluded From Computation Of Earnings Per Share Weighted Average Exercise Price AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareWeightedAverageExercisePrice	1.86
CY2011	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	5485185	shares
CY2010	epm	Antidilutive Securities Excluded From Computation Of Earnings Per Share Weighted Average Exercise Price AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareWeightedAverageExercisePrice	1.83
CY2010	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	5642128	shares
CY2012	dei	Entity Registrant Name EntityRegistrantName	EVOLUTION PETROLEUM CORP
CY2012	dei	Entity Central Index Key EntityCentralIndexKey	0001006655
CY2012	dei	Document Type DocumentType	10-K
CY2012	dei	Document Period End Date DocumentPeriodEndDate	2012-06-30
CY2012	dei	Amendment Flag AmendmentFlag	false
CY2012	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--06-30
CY2012	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	No
CY2012	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2012	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2012	dei	Entity Filer Category EntityFilerCategory	Accelerated Filer
CY2012Q3	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	28840163	shares
CY2012	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2012
CY2012	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2011Q2	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	4247438	USD
CY2011Q2	us-gaap	Certificates Of Deposit At Carrying Value CertificatesOfDepositAtCarryingValue	250000	USD
CY2011Q2	epm	Restricted Cash From Joint Interest Partner Current RestrictedCashFromJointInterestPartnerCurrent	118194	USD
CY2011Q2	epm	Oil And Natural Gas Sales Receivables Current OilAndNaturalGasSalesReceivablesCurrent	1559404	USD
CY2011Q2	us-gaap	Oil And Gas Joint Interest Billing Receivables Current OilAndGasJointInterestBillingReceivablesCurrent	86105	USD
CY2011Q2	epm	Income Taxes Receivable Current IncomeTaxesReceivableCurrent	28680	USD
CY2011Q2	us-gaap	Other Receivables Net Current OtherReceivablesNetCurrent	167	USD
CY2011Q2	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	67852	USD
CY2011Q2	us-gaap	Assets Current AssetsCurrent	6357840	USD
CY2012Q2	us-gaap	Assets Current AssetsCurrent	16769789	USD
CY2011Q2	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	77287	USD
CY2011Q2	us-gaap	Assets Assets	39951953	USD
CY2012Q2	us-gaap	Assets Assets	58955486	USD
CY2011Q2	us-gaap	Accounts Payable Current AccountsPayableCurrent	514177	USD
CY2011Q2	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	682850	USD
CY2011Q2	us-gaap	Accrued Royalties Current AccruedRoyaltiesCurrent	742651	USD
CY2011Q2	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	82122	USD
CY2011Q2	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	84565	USD
CY2011Q2	us-gaap	Liabilities Current LiabilitiesCurrent	2211932	USD
CY2012Q2	us-gaap	Liabilities Current LiabilitiesCurrent	5088917	USD
CY2011Q2	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	3330266	USD
CY2011Q2	us-gaap	Deferred Rent Credit Noncurrent DeferredRentCreditNoncurrent	85412	USD
CY2011Q2	us-gaap	Liabilities Liabilities	6487196	USD
CY2011Q2	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2012Q2	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2011Q2	us-gaap	Common Stock Value CommonStockValue	28400	USD
CY2011Q2	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	20761209	USD
CY2011Q2	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	13557170	USD
CY2011Q2	us-gaap	Stockholders Equity Before Treasury Stock StockholdersEquityBeforeTreasuryStock	34346779	USD
CY2011Q2	us-gaap	Treasury Stock Value TreasuryStockValue	882022	USD
CY2011Q2	us-gaap	Stockholders Equity StockholdersEquity	33464757	USD
CY2011Q2	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	39951953	USD
CY2012Q2	us-gaap	Stockholders Equity StockholdersEquity	46622788	USD
CY2012Q2	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	58955486	USD
CY2012Q2	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.001
CY2011Q2	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.001
CY2012Q2	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	5000000	shares
CY2011Q2	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	5000000	shares
CY2012Q2	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.001
CY2011Q2	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.001
CY2012Q2	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	100000000	shares
CY2011Q2	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	100000000	shares
CY2012Q2	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	28670424	shares
CY2011Q2	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	28670424	shares
CY2012Q2	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	27882224	shares
CY2011Q2	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	27612916	shares
CY2012Q2	us-gaap	Treasury Stock Shares TreasuryStockShares	788200	shares
CY2011Q2	us-gaap	Treasury Stock Shares TreasuryStockShares	788200	shares
CY2011	epm	Revenue From Crude Oil RevenueFromCrudeOil	5672471	USD
CY2010	epm	Revenue From Crude Oil RevenueFromCrudeOil	2188259	USD
CY2011	epm	Revenue From Natural Gas Liquids RevenueFromNaturalGasLiquids	893525	USD
CY2010	epm	Revenue From Natural Gas Liquids RevenueFromNaturalGasLiquids	1079383	USD
CY2011	us-gaap	Natural Gas Production Revenue NaturalGasProductionRevenue	964879	USD
CY2010	us-gaap	Natural Gas Production Revenue NaturalGasProductionRevenue	1754259	USD
CY2011	us-gaap	Sales Revenue Net SalesRevenueNet	7530875	USD
CY2010	us-gaap	Sales Revenue Net SalesRevenueNet	5021901	USD
CY2011	us-gaap	Lease Operating Expense LeaseOperatingExpense	1298650	USD
CY2010	us-gaap	Lease Operating Expense LeaseOperatingExpense	1616767	USD
CY2011	us-gaap	Production Tax Expense ProductionTaxExpense	80677	USD
CY2010	us-gaap	Production Tax Expense ProductionTaxExpense	48312	USD
CY2011	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	563104	USD
CY2010	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	1818110	USD
CY2011	us-gaap	Net Income Loss NetIncomeLoss	-241553	USD
CY2010	us-gaap	Net Income Loss NetIncomeLoss	-2387707	USD
CY2011	us-gaap	Operating Expenses OperatingExpenses	7337728	USD
CY2010	us-gaap	Operating Expenses OperatingExpenses	8636486	USD
CY2011	us-gaap	Operating Income Loss OperatingIncomeLoss	193147	USD
CY2010	us-gaap	Operating Income Loss OperatingIncomeLoss	-3614585	USD
CY2012	us-gaap	Sales Revenue Net SalesRevenueNet	17962038	USD
CY2012	us-gaap	Operating Expenses OperatingExpenses	9132764	USD
CY2012	us-gaap	Operating Income Loss OperatingIncomeLoss	8829274	USD
CY2011	us-gaap	Investment Income Interest InvestmentIncomeInterest	14214	USD
CY2010	us-gaap	Investment Income Interest InvestmentIncomeInterest	55054	USD
CY2011	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	207361	USD
CY2010	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-3559531	USD
CY2011	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	448914	USD
CY2010	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-1171824	USD
CY2011	epm	Depreciation Depletion And Amortization Cash Flows Impact DepreciationDepletionAndAmortizationCashFlowsImpact	563104	USD
CY2011Q4	dei	Entity Public Float EntityPublicFloat	0	USD
CY2011	us-gaap	Share Based Compensation ShareBasedCompensation	1536007	USD
CY2010	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.09
CY2010	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.09
CY2012	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	630391	USD
CY2012	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	8833052	USD
CY2012	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	4501739	USD
CY2012	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	27784298	shares
CY2011	epm	Payments On Asset Retirement Obligations PaymentsOnAssetRetirementObligations	1847	USD
CY2011	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	380386	USD
CY2011	epm	Deferred Rent Expenses DeferredRentExpenses	3777	USD
CY2011	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-32080	USD
CY2011	epm	Increase Decrease In Receivables From Oil And Natural Gas Sales IncreaseDecreaseInReceivablesFromOilAndNaturalGasSales	1023038	USD
CY2011	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	-687228	USD
CY2011	epm	Increase Decrease In Amount Due From Joint Interest Partner IncreaseDecreaseInAmountDueFromJointInterestPartner	87743	USD
CY2011	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-90652	USD
CY2011	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	497783	USD
CY2011	us-gaap	Increase Decrease In Royalties Payable IncreaseDecreaseInRoyaltiesPayable	521589	USD
CY2011	us-gaap	Increase Decrease In Accrued Taxes Payable IncreaseDecreaseInAccruedTaxesPayable	36778	USD
CY2011	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	231326	USD
CY2011	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	3055116	USD
CY2011	epm	Payment For Development Of Oil And Gas Properties PaymentForDevelopmentOfOilAndGasProperties	2509652	USD
CY2011	epm	Payment For Acquisition Of Oil And Gas Properties PaymentForAcquisitionOfOilAndGasProperties	997279	USD
CY2011	us-gaap	Payments To Acquire Other Property Plant And Equipment PaymentsToAcquireOtherPropertyPlantAndEquipment	864	USD
CY2011	epm	Proceeds From Maturities Of Certificates Of Deposit ProceedsFromMaturitiesOfCertificatesOfDeposit	1100000	USD
CY2011	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	48702	USD
CY2011	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-2225171	USD
CY2011	epm	Proceeds From Issuance Of Restricted Stock ProceedsFromIssuanceOfRestrictedStock	28	USD
CY2011	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	106049	USD
CY2011	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	173157	USD
CY2011	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	279234	USD
CY2011	us-gaap	Net Cash Provided By Used In Continuing Operations NetCashProvidedByUsedInContinuingOperations	1109179	USD
CY2010	us-gaap	Net Cash Provided By Used In Continuing Operations NetCashProvidedByUsedInContinuingOperations	-753505	USD
CY2010	epm	Proceeds From Issuance Of Restricted Stock ProceedsFromIssuanceOfRestrictedStock	42	USD
CY2010	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	3300	USD
CY2010	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	3342	USD
CY2010	epm	Payment For Development Of Oil And Gas Properties PaymentForDevelopmentOfOilAndGasProperties	3280425	USD
CY2010	epm	Payment For Acquisition Of Oil And Gas Properties PaymentForAcquisitionOfOilAndGasProperties	517530	USD
CY2010	epm	Proceeds From Maturities Of Certificates Of Deposit ProceedsFromMaturitiesOfCertificatesOfDeposit	2059147	USD
CY2010	epm	Purchases Of Certificates Of Deposit PurchasesOfCertificatesOfDeposit	1350000	USD
CY2010	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	13220	USD
CY2010	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-3102028	USD
CY2010	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	-1512041	USD
CY2010	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-3947	USD
CY2010	epm	Increase Decrease In Receivables From Oil And Natural Gas Sales IncreaseDecreaseInReceivablesFromOilAndNaturalGasSales	4048	USD
CY2010	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	65144	USD
CY2010	us-gaap	Increase Decrease In Royalties Payable IncreaseDecreaseInRoyaltiesPayable	2585	USD
CY2010	us-gaap	Increase Decrease In Accrued Taxes Payable IncreaseDecreaseInAccruedTaxesPayable	-112402	USD
CY2010	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	2345181	USD
CY2010	epm	Depreciation Depletion And Amortization Cash Flows Impact DepreciationDepletionAndAmortizationCashFlowsImpact	1818110	USD
CY2010	us-gaap	Share Based Compensation ShareBasedCompensation	2148400	USD
CY2010	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	61054	USD
CY2010	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-771437	USD
CY2010Q2	us-gaap	Stockholders Equity StockholdersEquity	31477193	USD
CY2011	us-gaap	Stock Issued During Period Value Restricted Stock Award Gross StockIssuedDuringPeriodValueRestrictedStockAwardGross	28	USD
CY2011	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	106049	USD
CY2011	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	1536007	USD
CY2010Q2	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	3138259	USD
CY2010	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	1561367	USD
CY2010	us-gaap	Adjustments To Additional Paid In Capital Tax Effect From Share Based Compensation AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation	173157	USD
CY2012	us-gaap	Dividends Preferred Stock DividendsPreferredStock	630391	USD
CY2010	epm	Deferred Rent Expenses DeferredRentExpenses	3777	USD
CY2010	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-5717	USD
CY2012	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	10375406	USD
CY2012	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-6580911	USD
CY2012	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	6386615	USD
CY2012	us-gaap	Net Cash Provided By Used In Continuing Operations NetCashProvidedByUsedInContinuingOperations	10181110	USD
CY2009Q2	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	3891764	USD
CY2012Q2	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	14428548	USD
CY2009Q2	us-gaap	Stockholders Equity StockholdersEquity	31756594	USD
CY2010	us-gaap	Stock Issued During Period Value Restricted Stock Award Gross StockIssuedDuringPeriodValueRestrictedStockAwardGross	42	USD
CY2010	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	3300	USD
CY2012	us-gaap	Net Income Loss NetIncomeLoss	5132130	USD
CY2012	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	1475995	USD
CY2012	us-gaap	Stock Issued During Period Value Restricted Stock Award Gross StockIssuedDuringPeriodValueRestrictedStockAwardGross	34	USD
CY2012	us-gaap	Share Based Compensation ShareBasedCompensation	1475995	USD
CY2011Q2	us-gaap	Property Plant And Equipment Other PropertyPlantAndEquipmentOther	261340	USD
CY2012	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	309632	USD
CY2012	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	841698	USD
CY2011	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	132596	USD
CY2010	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	207952	USD
CY2011	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-64068	USD
CY2010	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-608339	USD
CY2012	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	1151330	USD
CY2011	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	68528	USD
CY2010	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	-400387	USD
CY2012	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	2542662	USD
CY2012	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	6930	USD
CY2011	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	360174	USD
CY2011	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	20212	USD
CY2010	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-553326	USD
CY2010	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-218111	USD
CY2012	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	2549592	USD
CY2012	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3700922	USD
CY2012	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	3003238	USD
CY2011	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	70503	USD
CY2010	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-1210241	USD
CY2012	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	560095	USD
CY2012	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	83115	USD
CY2012	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-4348495	USD
CY2012	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	54474	USD
CY2011	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	100853	USD
CY2011	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	140620	USD
CY2011	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	-7172	USD
CY2011	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	2190	USD
CY2010	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	-10413	USD
CY2010	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	105402	USD
CY2010	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	-42651	USD
CY2010	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-13921	USD
CY2012Q2	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	774720	USD
CY2012Q2	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	1336769	USD
CY2012Q2	epm	Deferred Tax Assets Tax Credit Carryforwards Alternative Minimum Tax Net DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTaxNet	714571	USD
CY2012Q2	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	29929	USD
CY2012Q2	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	2855989	USD
CY2012Q2	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	893410	USD
CY2012Q2	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	1962579	USD
CY2012Q2	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	7842437	USD
CY2012Q2	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	7842437	USD
CY2011	epm	Income Tax Reconciliation Reversal Of Deductions Due To Carry Backs IncomeTaxReconciliationReversalOfDeductionsDueToCarryBacks	141920	USD
CY2012Q2	epm	Deferred Taxes Business Combination Operating Loss Carryforwards Amount Available To Use DeferredTaxesBusinessCombinationOperatingLossCarryforwardsAmountAvailableToUse	400000	USD
CY2012Q2	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	5879858	USD
CY2011Q2	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	959547	USD
CY2011Q2	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	5910275	USD
CY2011Q2	epm	Deferred Tax Assets Tax Credit Carryforwards Alternative Minimum Tax Net DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTaxNet	682456	USD
CY2011Q2	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	23626	USD
CY2011Q2	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	7575904	USD
CY2011Q2	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	5187983	USD
CY2011Q2	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	2387921	USD
CY2011Q2	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	5718187	USD
CY2011Q2	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	5718187	USD
CY2011Q2	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	3330266	USD
CY2010Q2	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	866035	USD
CY2010Q2	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	5389065	USD
CY2010Q2	epm	Deferred Tax Assets Tax Credit Carryforwards Alternative Minimum Tax Net DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTaxNet	645938	USD
CY2010Q2	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	21306	USD
CY2010Q2	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	6922344	USD
CY2010Q2	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	5187983	USD
CY2010Q2	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	1734361	USD
CY2010Q2	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	4684241	USD
CY2010Q2	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	4684241	USD
CY2010Q2	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	2949880	USD
CY2012Q2	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Alternative Minimum Tax DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax	844440	USD
CY2012Q2	epm	Deferred Tax Liability Tax Credit Carryforwards Alternative Minimum Tax Associated With Windfall Tax Benefit DeferredTaxLiabilityTaxCreditCarryforwardsAlternativeMinimumTaxAssociatedWithWindfallTaxBenefit	129869	USD
CY2012Q2	epm	Deferred Tax Liability Operating Loss Carryforwards Associated With Windfall Tax Benefit DeferredTaxLiabilityOperatingLossCarryforwardsAssociatedWithWindfallTaxBenefit	394487	USD
CY2010	epm	Recovery Of Taxes Due To Carry Back Of Tax Losses RecoveryOfTaxesDueToCarryBackOfTaxLosses	1000000	USD
CY2012Q2	us-gaap	Operating Loss Carryforwards OperatingLossCarryforwards	3900000	USD
CY2012Q2	epm	Deferred Taxes Business Combination Operating Loss Carryforwards DeferredTaxesBusinessCombinationOperatingLossCarryforwards	3100000	USD
CY2011	us-gaap	Costs Incurred Development Costs CostsIncurredDevelopmentCosts	2200905	USD
CY2011	us-gaap	Costs Incurred Acquisition Of Oil And Gas Properties With Proved Reserves CostsIncurredAcquisitionOfOilAndGasPropertiesWithProvedReserves	465176	USD
CY2011	epm	Costs Incurred Acquisition Of Oil And Gas Properties Including Exploration And Development Cost CostsIncurredAcquisitionOfOilAndGasPropertiesIncludingExplorationAndDevelopmentCost	3405332	USD
CY2012Q2	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	159011	USD
CY2012Q2	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	159011	USD
CY2012Q2	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	159011	USD
CY2012Q2	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	159011	USD
CY2012Q2	epm	Operating Leases Future Minimum Payments Due After Four Years OperatingLeasesFutureMinimumPaymentsDueAfterFourYears	13251	USD
CY2012Q2	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	649295	USD
CY2012	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	147233	USD
CY2011	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	146263	USD
CY2010	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	138823	USD
CY2012	us-gaap	Costs Incurred Acquisition Of Oil And Gas Properties With Proved Reserves CostsIncurredAcquisitionOfOilAndGasPropertiesWithProvedReserves	115637	USD
CY2012	us-gaap	Costs Incurred Acquisition Of Unproved Oil And Gas Properties CostsIncurredAcquisitionOfUnprovedOilAndGasProperties	5544217	USD
CY2012	us-gaap	Costs Incurred Exploration Costs CostsIncurredExplorationCosts	3016924	USD
CY2012	us-gaap	Costs Incurred Development Costs CostsIncurredDevelopmentCosts	238463	USD
CY2012	epm	Costs Incurred Acquisition Of Oil And Gas Properties Including Exploration And Development Cost CostsIncurredAcquisitionOfOilAndGasPropertiesIncludingExplorationAndDevelopmentCost	8915241	USD
CY2011	us-gaap	Costs Incurred Acquisition Of Unproved Oil And Gas Properties CostsIncurredAcquisitionOfUnprovedOilAndGasProperties	523591	USD
CY2011	us-gaap	Costs Incurred Exploration Costs CostsIncurredExplorationCosts	215660	USD
CY2010	us-gaap	Costs Incurred Acquisition Of Unproved Oil And Gas Properties CostsIncurredAcquisitionOfUnprovedOilAndGasProperties	185154	USD
CY2010	us-gaap	Costs Incurred Exploration Costs CostsIncurredExplorationCosts	2354239	USD
CY2010	us-gaap	Costs Incurred Development Costs CostsIncurredDevelopmentCosts	890116	USD
CY2010	us-gaap	Costs Incurred Acquisition Of Oil And Gas Properties With Proved Reserves CostsIncurredAcquisitionOfOilAndGasPropertiesWithProvedReserves	391785	USD
CY2010	epm	Costs Incurred Acquisition Of Oil And Gas Properties Including Exploration And Development Cost CostsIncurredAcquisitionOfOilAndGasPropertiesIncludingExplorationAndDevelopmentCost	3821294	USD
CY2012Q2	us-gaap	Proved Developed And Undeveloped Reserves Net ProvedDevelopedAndUndevelopedReservesNet	13441116	Boe
CY2011Q2	us-gaap	Proved Developed And Undeveloped Reserves Net ProvedDevelopedAndUndevelopedReservesNet	13847462	Boe
CY2010Q2	us-gaap	Proved Developed And Undeveloped Reserves Net ProvedDevelopedAndUndevelopedReservesNet	12418256	Boe
CY2009Q2	us-gaap	Proved Developed And Undeveloped Reserves Net ProvedDevelopedAndUndevelopedReservesNet	3060040	Boe
CY2012	us-gaap	Proved Developed And Undeveloped Reserves Revisions Of Previous Estimates Increase Decrease ProvedDevelopedAndUndevelopedReservesRevisionsOfPreviousEstimatesIncreaseDecrease	-344440	Boe
CY2011	us-gaap	Proved Developed And Undeveloped Reserves Revisions Of Previous Estimates Increase Decrease ProvedDevelopedAndUndevelopedReservesRevisionsOfPreviousEstimatesIncreaseDecrease	1937405	Boe
CY2010	us-gaap	Proved Developed And Undeveloped Reserves Revisions Of Previous Estimates Increase Decrease ProvedDevelopedAndUndevelopedReservesRevisionsOfPreviousEstimatesIncreaseDecrease	-60943	Boe
CY2012	epm	Proved Developed And Undeveloped Reserves Recovery Extensions And Discoveries ProvedDevelopedAndUndevelopedReservesRecoveryExtensionsAndDiscoveries	146249	Boe
CY2011	epm	Proved Developed And Undeveloped Reserves Recovery Extensions And Discoveries ProvedDevelopedAndUndevelopedReservesRecoveryExtensionsAndDiscoveries	129926	Boe
CY2010	epm	Proved Developed And Undeveloped Reserves Recovery Extensions And Discoveries ProvedDevelopedAndUndevelopedReservesRecoveryExtensionsAndDiscoveries	9544674	Boe
CY2011	us-gaap	Proved Developed And Undeveloped Reserves Sales Of Minerals In Place ProvedDevelopedAndUndevelopedReservesSalesOfMineralsInPlace	521688	Boe
CY2012	us-gaap	Proved Developed And Undeveloped Reserves Production ProvedDevelopedAndUndevelopedReservesProduction	208155	Boe
CY2011	us-gaap	Proved Developed And Undeveloped Reserves Production ProvedDevelopedAndUndevelopedReservesProduction	116437	Boe
CY2010	us-gaap	Proved Developed And Undeveloped Reserves Production ProvedDevelopedAndUndevelopedReservesProduction	125515	Boe
CY2012Q2	us-gaap	Proved Developed Reserves Boe ProvedDevelopedReservesBOE	8032809	Boe
CY2011Q2	us-gaap	Proved Developed Reserves Boe ProvedDevelopedReservesBOE	5344471	Boe
CY2010Q2	us-gaap	Proved Developed Reserves Boe ProvedDevelopedReservesBOE	1119498	Boe
CY2009Q2	us-gaap	Proved Developed Reserves Boe ProvedDevelopedReservesBOE	430441	Boe
CY2012	epm	Proved Developed And Undeveloped Reserves Increase Decrease In Period ProvedDevelopedAndUndevelopedReservesIncreaseDecreaseInPeriod	-400000	Boe
CY2011	epm	Proved Developed And Undeveloped Reserves Increase Decrease In Period ProvedDevelopedAndUndevelopedReservesIncreaseDecreaseInPeriod	1400000	Boe
CY2010	epm	Proved Developed And Undeveloped Reserves Increase Decrease In Period ProvedDevelopedAndUndevelopedReservesIncreaseDecreaseInPeriod	9400000	Boe
CY2012	us-gaap	Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves Future Cash Inflows DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureCashInflows	1355686188	USD
CY2012	epm	Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves Future Production Costs And Severance Taxes DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureProductionCostsAndSeveranceTaxes	458716938	USD
CY2012	us-gaap	Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves Future Development Costs DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureDevelopmentCosts	38458724	USD
CY2012	us-gaap	Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves Future Income Tax Expense DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureIncomeTaxExpense	296703838	USD
CY2012	us-gaap	Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves Future Net Cash Flows DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureNetCashFlows	561806688	USD
CY2012	us-gaap	Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves10 Percent Annual Discount For Estimated Timing Of Cash Flows DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves10PercentAnnualDiscountForEstimatedTimingOfCashFlows	278209195	USD
CY2012	us-gaap	Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves Standardized Measure DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesStandardizedMeasure	283597493	USD
CY2011	us-gaap	Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves Future Cash Inflows DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureCashInflows	1161278060	USD
CY2011	epm	Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves Future Production Costs And Severance Taxes DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureProductionCostsAndSeveranceTaxes	379493392	USD
CY2011	us-gaap	Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves Future Development Costs DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureDevelopmentCosts	40571895	USD
CY2011	us-gaap	Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves Future Income Tax Expense DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureIncomeTaxExpense	278455798	USD
CY2011	us-gaap	Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves Future Net Cash Flows DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureNetCashFlows	462756975	USD
CY2011	us-gaap	Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves10 Percent Annual Discount For Estimated Timing Of Cash Flows DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves10PercentAnnualDiscountForEstimatedTimingOfCashFlows	234309020	USD
CY2011	us-gaap	Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves Standardized Measure DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesStandardizedMeasure	228447954	USD
CY2010	us-gaap	Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves Future Cash Inflows DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureCashInflows	827902260	USD
CY2010	epm	Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves Future Production Costs And Severance Taxes DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureProductionCostsAndSeveranceTaxes	222826052	USD
CY2010	us-gaap	Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves Future Development Costs DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureDevelopmentCosts	34024112	USD
CY2010	us-gaap	Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves Future Income Tax Expense DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureIncomeTaxExpense	213063769	USD
CY2010	us-gaap	Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves Future Net Cash Flows DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureNetCashFlows	357988327	USD
CY2010	us-gaap	Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves10 Percent Annual Discount For Estimated Timing Of Cash Flows DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves10PercentAnnualDiscountForEstimatedTimingOfCashFlows	196361678	USD
CY2010	us-gaap	Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves Standardized Measure DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesStandardizedMeasure	161626649	USD
CY2012	epm	Period Considered For Determining Unweighted Arithmetic Average Of First Day Of Month Commodity Prices PeriodConsideredForDeterminingUnweightedArithmeticAverageOfFirstDayOfMonthCommodityPrices	P12M
CY2012	us-gaap	Net Increase Decrease In Sales And Transfer Prices And Production Costs NetIncreaseDecreaseInSalesAndTransferPricesAndProductionCosts	76942613	USD
CY2012	us-gaap	Increase Decrease In Estimated Future Development Costs IncreaseDecreaseInEstimatedFutureDevelopmentCosts	6340123	USD
CY2012	us-gaap	Sales And Transfers Of Oil And Gas Produced Net Of Production Costs SalesAndTransfersOfOilAndGasProducedNetOfProductionCosts	16187039	USD
CY2012	us-gaap	Increase Due To Purchases Of Minerals In Place IncreaseDueToPurchasesOfMineralsInPlace	0	USD
CY2012	us-gaap	Extensions Discoveries Additions And Improved Recovery Less Related Costs ExtensionsDiscoveriesAdditionsAndImprovedRecoveryLessRelatedCosts	1606122	USD
CY2012	us-gaap	Revisions Of Previous Quantity Estimates RevisionsOfPreviousQuantityEstimates	-11975496	USD
CY2012	us-gaap	Previously Estimated Development Costs Incurred During Period PreviouslyEstimatedDevelopmentCostsIncurredDuringPeriod	-2639398	USD
CY2012	us-gaap	Accretion Of Discount AccretionOfDiscount	22568868	USD
CY2012	us-gaap	Increase Decrease In Future Income Tax Expense Estimates On Future Cash Flows Related To Proved Oil And Gas Reserves IncreaseDecreaseInFutureIncomeTaxExpenseEstimatesOnFutureCashFlowsRelatedToProvedOilAndGasReserves	-15026628	USD
CY2012	us-gaap	Standardized Measure Of Discounted Future Net Cash Flow Of Proved Oil And Gas Reserves Other StandardizedMeasureOfDiscountedFutureNetCashFlowOfProvedOilAndGasReservesOther	-6479626	USD
CY2011	us-gaap	Net Increase Decrease In Sales And Transfer Prices And Production Costs NetIncreaseDecreaseInSalesAndTransferPricesAndProductionCosts	57178860	USD
CY2011	us-gaap	Increase Decrease In Estimated Future Development Costs IncreaseDecreaseInEstimatedFutureDevelopmentCosts	-16028728	USD
CY2011	us-gaap	Sales And Transfers Of Oil And Gas Produced Net Of Production Costs SalesAndTransfersOfOilAndGasProducedNetOfProductionCosts	6151549	USD
CY2011	us-gaap	Extensions Discoveries Additions And Improved Recovery Less Related Costs ExtensionsDiscoveriesAdditionsAndImprovedRecoveryLessRelatedCosts	623446	USD
CY2011	us-gaap	Revisions Of Previous Quantity Estimates RevisionsOfPreviousQuantityEstimates	56766220	USD
CY2011	us-gaap	Decrease Due To Sales Of Minerals In Place DecreaseDueToSalesOfMineralsInPlace	8233734	USD
CY2011	us-gaap	Previously Estimated Development Costs Incurred During Period PreviouslyEstimatedDevelopmentCostsIncurredDuringPeriod	2416565	USD
CY2011	us-gaap	Accretion Of Discount AccretionOfDiscount	26597834	USD
CY2011	us-gaap	Increase Decrease In Future Income Tax Expense Estimates On Future Cash Flows Related To Proved Oil And Gas Reserves IncreaseDecreaseInFutureIncomeTaxExpenseEstimatesOnFutureCashFlowsRelatedToProvedOilAndGasReserves	-42490270	USD
CY2011	us-gaap	Standardized Measure Of Discounted Future Net Cash Flow Of Proved Oil And Gas Reserves Other StandardizedMeasureOfDiscountedFutureNetCashFlowOfProvedOilAndGasReservesOther	-3857339	USD
CY2010	us-gaap	Net Increase Decrease In Sales And Transfer Prices And Production Costs NetIncreaseDecreaseInSalesAndTransferPricesAndProductionCosts	3935863	USD
CY2010	us-gaap	Increase Decrease In Estimated Future Development Costs IncreaseDecreaseInEstimatedFutureDevelopmentCosts	-3502403	USD
CY2010	us-gaap	Sales And Transfers Of Oil And Gas Produced Net Of Production Costs SalesAndTransfersOfOilAndGasProducedNetOfProductionCosts	3356822	USD
CY2010	us-gaap	Extensions Discoveries Additions And Improved Recovery Less Related Costs ExtensionsDiscoveriesAdditionsAndImprovedRecoveryLessRelatedCosts	236828138	USD
CY2010	us-gaap	Revisions Of Previous Quantity Estimates RevisionsOfPreviousQuantityEstimates	-934602	USD
CY2010	us-gaap	Accretion Of Discount AccretionOfDiscount	3582622	USD
CY2010	us-gaap	Increase Decrease In Future Income Tax Expense Estimates On Future Cash Flows Related To Proved Oil And Gas Reserves IncreaseDecreaseInFutureIncomeTaxExpenseEstimatesOnFutureCashFlowsRelatedToProvedOilAndGasReserves	-91991767	USD
CY2010	us-gaap	Standardized Measure Of Discounted Future Net Cash Flow Of Proved Oil And Gas Reserves Other StandardizedMeasureOfDiscountedFutureNetCashFlowOfProvedOilAndGasReservesOther	-6484171	USD
CY2012Q2	us-gaap	Standardized Measure Of Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves StandardizedMeasureOfDiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves	283597493	USD
CY2011Q2	us-gaap	Standardized Measure Of Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves StandardizedMeasureOfDiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves	228447954	USD
CY2010Q2	us-gaap	Standardized Measure Of Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves StandardizedMeasureOfDiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves	161626649	USD
CY2009Q2	us-gaap	Standardized Measure Of Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves StandardizedMeasureOfDiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves	23549791	USD
CY2011	us-gaap	Stock Issued During Period Value Share Based Compensation Gross StockIssuedDuringPeriodValueShareBasedCompensationGross	587033	USD
CY2012Q2	us-gaap	Capitalized Costs Of Unproved Properties Excluded From Amortization Cumulative CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationCumulative	6042094	USD
CY2011	us-gaap	Proceeds From Income Tax Refunds ProceedsFromIncomeTaxRefunds	979177	USD
CY2010	us-gaap	Proceeds From Income Tax Refunds ProceedsFromIncomeTaxRefunds	2095126	USD
CY2011	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	-91483	USD
CY2010	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	-62532	USD
CY2012	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	-196396	USD
CY2010	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	85871	USD
CY2011Q2	us-gaap	Property Plant And Equipment Other Net PropertyPlantAndEquipmentOtherNet	69262	USD
CY2012Q2	us-gaap	Property Plant And Equipment Other Net PropertyPlantAndEquipmentOtherNet	92271	USD
CY2012	epm	Contract Period Sale Of Gas Oil And Condensate Production Maximum ContractPeriodSaleOfGasOilAndCondensateProductionMaximum	P12Y
CY2012	epm	Defined Contribution Plan Employer Match Employee Contribution Level One DefinedContributionPlanEmployerMatchEmployeeContributionLevelOne	0.06	pure
CY2011	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	5335384	USD
CY2010	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	5092243	USD
CY2011Q2	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	33516826	USD
CY2012Q2	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	40568443	USD
CY2012	epm	Defined Contribution Plan Employer Match Level One DefinedContributionPlanEmployerMatchLevelOne	1.00	pure
CY2010	us-gaap	Stock Issued During Period Value Share Based Compensation Gross StockIssuedDuringPeriodValueShareBasedCompensationGross	370440	USD
CY2012Q2	us-gaap	Certificates Of Deposit At Carrying Value CertificatesOfDepositAtCarryingValue	250000	USD
CY2012Q2	epm	Oil And Natural Gas Sales Receivables Current OilAndNaturalGasSalesReceivablesCurrent	1343347	USD
CY2012Q2	us-gaap	Oil And Gas Joint Interest Billing Receivables Current OilAndGasJointInterestBillingReceivablesCurrent	96151	USD
CY2012Q2	epm	Income Taxes Receivable Current IncomeTaxesReceivableCurrent	92885	USD
CY2012Q2	us-gaap	Other Receivables Net Current OtherReceivablesNetCurrent	190	USD
CY2012Q2	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	233433	USD
CY2012Q2	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	250333	USD
CY2012Q2	us-gaap	Accounts Payable Current AccountsPayableCurrent	407570	USD
CY2012Q2	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	1005624	USD
CY2012Q2	us-gaap	Accrued Royalties Current AccruedRoyaltiesCurrent	294013	USD
CY2012Q2	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	91967	USD
CY2012Q2	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	71768	USD
CY2012Q2	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	6205093	USD
CY2012Q2	us-gaap	Deferred Rent Credit Noncurrent DeferredRentCreditNoncurrent	70011	USD
CY2012Q2	us-gaap	Liabilities Liabilities	12332698	USD
CY2012Q2	us-gaap	Common Stock Value CommonStockValue	28670	USD
CY2012Q2	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	29416914	USD
CY2012Q2	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	18058909	USD
CY2012Q2	us-gaap	Stockholders Equity Before Treasury Stock StockholdersEquityBeforeTreasuryStock	47504810	USD
CY2012Q2	us-gaap	Treasury Stock Value TreasuryStockValue	882022	USD
CY2011Q2	us-gaap	Capitalized Costs Of Unproved Properties Excluded From Amortization Cumulative CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationCumulative	2940199	USD
CY2012	epm	Revenue From Crude Oil RevenueFromCrudeOil	16547415	USD
CY2012	epm	Revenue From Natural Gas Liquids RevenueFromNaturalGasLiquids	620187	USD
CY2012	us-gaap	Natural Gas Production Revenue NaturalGasProductionRevenue	794436	USD
CY2012	us-gaap	Lease Operating Expense LeaseOperatingExpense	1708235	USD
CY2012	us-gaap	Production Tax Expense ProductionTaxExpense	66764	USD
CY2012	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	1136974	USD
CY2012	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	6143286	USD
CY2012	us-gaap	Investment Income Interest InvestmentIncomeInterest	25728	USD
CY2012	us-gaap	Interest Expense InterestExpense	21950	USD
CY2012	epm	Depreciation Depletion And Amortization Cash Flows Impact DepreciationDepletionAndAmortizationCashFlowsImpact	1150454	USD
CY2012	epm	Payments On Asset Retirement Obligations PaymentsOnAssetRetirementObligations	61936	USD
CY2012	epm	Deferred Rent Expenses DeferredRentExpenses	-15401	USD
CY2012	epm	Increase Decrease In Receivables From Oil And Natural Gas Sales IncreaseDecreaseInReceivablesFromOilAndNaturalGasSales	-216057	USD
CY2012	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	64194	USD
CY2012	epm	Increase Decrease In Amount Due From Joint Interest Partner IncreaseDecreaseInAmountDueFromJointInterestPartner	-139705	USD
CY2012	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	165581	USD
CY2012	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	379873	USD
CY2012	us-gaap	Increase Decrease In Royalties Payable IncreaseDecreaseInRoyaltiesPayable	-448638	USD
CY2012	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	249728	USD
CY2012	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	7932975	USD
CY2012	us-gaap	Adjustments To Additional Paid In Capital Stock Issued Issuance Costs AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts	1002440	USD
CY2012	us-gaap	Adjustments To Additional Paid In Capital Tax Effect From Share Based Compensation AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation	249728	USD
CY2012	epm	Increase Decrease Due To Joint Venture Partner IncreaseDecreaseDueToJointVenturePartner	1958029	USD
CY2012Q2	epm	Operating Loss Carryforwards Associated With Unutilized Windfall Tax Benefit OperatingLossCarryforwardsAssociatedWithUnutilizedWindfallTaxBenefit	1100000	USD
CY2012Q2	us-gaap	Advances To Affiliate AdvancesToAffiliate	1366921	USD
CY2012	us-gaap	Payments To Acquire Interest In Joint Venture PaymentsToAcquireInterestInJointVenture	224206	USD
CY2012	epm	Income Tax Reconciliation Expiring Net Operating Losses Related To Reverse Merger IncomeTaxReconciliationExpiringNetOperatingLossesRelatedToReverseMerger	4348495	USD
CY2012	epm	Period Considered For Unweighted Arithmetic Average For Determining Reserve Volumes And Values PeriodConsideredForUnweightedArithmeticAverageForDeterminingReserveVolumesAndValues	P12M
CY2012Q2	us-gaap	Deferred Tax Assets Liabilities Net Current DeferredTaxAssetsLiabilitiesNetCurrent	325235	USD
CY2011Q2	us-gaap	Due To Affiliate Current DueToAffiliateCurrent	105567	USD
CY2012	us-gaap	Increase Decrease In Accrued Taxes Payable IncreaseDecreaseInAccruedTaxesPayable	9845	USD
CY2012	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	799610	USD
CY2012	epm	Payment For Development Of Oil And Gas Properties PaymentForDevelopmentOfOilAndGasProperties	3291921	USD
CY2012	epm	Payment For Acquisition Of Oil And Gas Properties PaymentForAcquisitionOfOilAndGasProperties	3768162	USD
CY2012	us-gaap	Payments To Acquire Other Property Plant And Equipment PaymentsToAcquireOtherPropertyPlantAndEquipment	61176	USD
CY2012	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	35056	USD
CY2012	us-gaap	Proceeds From Issuance Of Preferred Stock And Preference Stock ProceedsFromIssuanceOfPreferredStockAndPreferenceStock	6930535	USD
CY2012	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	630391	USD
CY2012	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	163257	USD
CY2012Q2	us-gaap	Due To Affiliate Current DueToAffiliateCurrent	3217975	USD
CY2012	us-gaap	Proved Developed And Undeveloped Reserves Sales Of Minerals In Place ProvedDevelopedAndUndevelopedReservesSalesOfMineralsInPlace	0	Boe
CY2012Q2	epm	Advances To Affiliate Cash Call AdvancesToAffiliateCashCall	1142715	USD

Files In Submission

Name	View Source	Status
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0001104659-12-063322-index.html	Edgar Link	pending
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$EPM
EVOLUTION PETROLEUM CORP Stock $epm

2012 Q2 Form 10-K Financial Statement

#000110465912063322 Filed on September 13, 2012

Income Statement

Balance Sheet

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Facts In Submission

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$EPM EVOLUTION PETROLEUM CORP Stock $epm

2012 Q2 Form 10-K Financial Statement

#000110465912063322 Filed on September 13, 2012

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$EPM
EVOLUTION PETROLEUM CORP Stock $epm