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Stock-Based Incentive Plan - Narrative (Details) (USD $) | 3 Months Ended | 12 Months Ended |  | 0 Months Ended | 12 Months Ended | 3 Months Ended
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Dec. 31, 2013 | Jun. 30, 2014 Employee Stock Option | Jun. 30, 2013 Employee Stock Option | Jun. 30, 2012 Employee Stock Option | Jun. 30, 2014 Stock Options and Incentive Warrants | Jun. 30, 2013 Stock Options and Incentive Warrants | Jun. 30, 2012 Stock Options and Incentive Warrants | Jun. 30, 2014 Restricted Stock | Jun. 30, 2013 Restricted Stock | Jun. 30, 2012 Restricted Stock | Jun. 30, 2014 Evolution Petroleum Corporation Amended and Restated 2004 Stock Plan | Sep. 06, 2012 Evolution Petroleum Corporation Amended and Restated 2004 Stock Plan Restricted Stock | Aug. 31, 2011 Evolution Petroleum Corporation Amended and Restated 2004 Stock Plan Restricted Stock | Jun. 30, 2014 Restructuring Charges | Jun. 30, 2013 Restructuring Charges | Jun. 30, 2012 Restructuring Charges | Dec. 31, 2013 Restructuring Charges Stock Compensation, Restructuring
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Options and Incentive Warrants, Grants (in shares) |  | 0 | 0 | 0 | 0 |  |  |  |  |  |  |  |  |  |  |  |
Restricted stock, vested (shares) |  |  |  |  |  |  |  | 277,198 | 277,198 | 239,195 |  |  |  |  |  |  |
Options, Exercised, Intrinsic Value |  | $ 47,504,114 | $ 5,233,480 | $ 54,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Exercise of stock options (shares) |  | 4,644,759 | 550,000 | 20,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Shares authorized for granting (shares) |  |  |  |  |  |  |  |  |  |  | 6,500,000 |  |  |  |  |  |
Shares available for grant (shares) |  |  |  |  |  |  |  |  |  |  | 812,281 |  |  |  |  |  |
Non-cash stock-based compensation expense | 800,000 |  |  |  | 0 | 26,274 | 327,776 | 1,728,687 | 1,505,471 | 1,148,219 |  |  |  | 376,365 | 0 | 0 | 376,365
Options and Incentive Warrants Vested in Period |  |  |  |  | 0 | 18,922 | 154,955 |  |  |  |  |  |  |  |  |  |
Options and Incentive Warrants, vested in period, grant date, fair value |  |  |  |  | 0 | 46,359 | 336,252 |  |  |  |  |  |  |  |  |  |
Restricted stock, vested in period, grant date fair value |  |  |  |  |  |  |  | 1,796,243 | 1,427,570 | 1,078,769 |  |  |  |  |  |  |
Restricted stock compensation not yet recognized |  |  |  |  |  |  |  | $ 997,403 |  |  |  | $ 1,223,020 | $ 1,029,436 |  |  |  |
Recognition period for restricted stock compensation expense not yet recognized |  |  |  |  |  |  |  | 2 years 1 month 6 days |  |  |  | 4 years | 4 years |  |  |  |

X
- Definition The total fair value as of the grant date of equity-based awards for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement. + References No definition available. + Details
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- Definition Gross number of share options (or share units) and Incentive Warrants granted during the period. + References No definition available. + Details
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- Definition The number of Stock Options and Incentive Warrants that vested during the reporting period. + References No definition available. + Details
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- Definition The total fair value as of the grant date of equity-based awards for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement. + References No definition available. + Details
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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F + Details
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- Definition Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Unrecognized cost of unvested share-based awards, other than options, awarded to employees as compensation. + References No definition available. + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Number of share options (or share units) exercised during the current period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.28,29) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 + Details
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