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Stock-Based Compensation | 12 Months Ended
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Jun. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Stock-Based Compensation | Stock-Based Compensation At the December 8, 2016 annual meeting, the stockholders approved the adoption of the Evolution Petroleum Corporation 2016 Equity Incentive Plan (the “2016 Plan”), which replaced the Evolution Petroleum Corporation Amended and Restated 2004 Stock Plan (the "2004 Plan"). The 2016 Plan authorizes the issuance of 1,100,000 shares of common stock prior to its expiration on December 8, 2026. Incentives under the 2016 Plan may be granted to employees, directors and consultants of the Company in any one or a combination of the following forms: incentive stock options and non-statutory stock options, stock appreciation rights, restricted stock awards and restricted stock unit awards, performance share awards, performance cash awards, and other forms of incentives valued in whole or in part by reference to, or otherwise based on, our common stock, including its appreciation in value. As of June 30, 2017, 1,100,000 shares were available for grant under the 2016 Plan. At June 30, 2017, no shares remained available for grant under the 2004 Plan. We were authorized to issue 6,500,000 shares of common stock prior to its expiration on October 24, 2017. In connection with the adoption of the 2016 Plan, the Board terminated the 2004 Plan on December 8, 2016 and 32,146 remaining reserved shares were released to the Company's authorized but unissued and unreserved shares. All outstanding awards granted under the 2004 Plan continue to be subject to the terms and conditions as set forth in the agreements evidencing such awards and the terms of the 2004 Plan. Under these agreements, we have granted option awards to purchase common stock (the "Stock Options"), restricted common stock awards ("Restricted Stock"), contingent restricted common stock awards ("Contingent Restricted Stock") and/or unrestricted fully vested common stock, to employees, directors, and consultants of the Company. Stock Options No Stock Options have been granted since August 2008 and all compensation costs attributable to Stock Options have been recognized in prior periods. The following summary presents information regarding outstanding Stock Options as of June 30, 2017, and the changes during the period:
| Number of Stock Options |  | Weighted Average Exercise Price |  | Aggregate Intrinsic Value |  | Weighted Average Remaining Contractual Term (in years)
Stock Options outstanding at July 1, 2016 | 35,231 |  |  | $ | 2.19 |  |  |  |  |  |
Exercised | (35,231 | ) |  | 2.19 |  |  |  |  |  |
Stock Options outstanding at June 30, 2017 | — |  |  | $ | — |  |  | $ | — |  |  | 0.0
For the year ended June 30, 2017, there were 35,231 Stock Options exercised with an aggregate intrinsic value of $188,821. For the year ended June 30, 2016, there were 50,000 Stock Options exercised with an aggregate intrinsic value of $131,000. For the year ended June 30, 2015, there were 87,000 Stock Options exercised, with an aggregate intrinsic value of $501,810. No stock options vested during the years ended June 30, 2017, 2016, and 2015. Restricted Stock and Contingent Restricted Stock Prior to August 28, 2014, all Restricted Stock grants contained a four-year vesting period based solely on service. Restricted Stock which vests based solely on service is valued at the fair market value on the date of grant and amortized over the service period. In August 2014, December 2015 and September 2016, the Company awarded grants of both Restricted Stock and Contingent Restricted Stock as part of its long-term incentive plan. Such grants, which expire after four years if unvested, contain service-based, performance-based and market-based vesting provisions. The common shares underlying the Restricted Stock grants were issued on the date of grant, whereas the Contingent Restricted Stock are reserved from the Plan, but will be issued only upon the attainment of specified performance-based or market-based vesting provisions. Performance-based grants vest upon the attainment of earnings, revenue and other operational goals and require that the recipient remain an employee of the Company through the vesting date. The Company recognizes compensation expense for performance-based awards ratably over the expected vesting period based on the grant date fair value when it is deemed probable, for accounting purposes, that the performance criteria will be achieved. The expected vesting period may be deemed to be shorter than the four-year term. As of June 30, 2017, certain performance-based awards were not considered probable of vesting for accounting purposes and no compensation expense has been recognized with regard to these awards. If these awards are later determined to be probable of vesting, cumulative compensation expense would be recorded at that time and amortization would continue over the remaining expected vesting period. Market-based awards granted in 2016 entitle employees to vest in a fixed number of shares when the three-year trailing total return on the Company’s common stock exceeds the corresponding total returns of various quartiles of an index consisting of designated peer companies during defined measurement periods. Market-based awards granted in fiscal 2015 and 2016 entitle employees to vest in a fixed number of shares when the three-year trailing total return on the Company’s common stock exceeds the corresponding total returns of various quartiles of companies comprising the SIG Exploration and Production Index (NASDAQ EPX) during defined measurement periods. The fair value and expected vesting period of these awards were determined using a Monte Carlo simulation based on the historical volatility of the Company's total return compared to the historical volatilities of the other companies in the index. Vesting of market-based awards granted in fiscal 2017 is based on the Company's total common stock return compared to a peer group of sixteen companies in our industry with comparable market capitalizations. During the fiscal year ended June 30, 2017, we granted market-based awards with grant date fair values ranging from $3.42 to $5.62 per share, all with an expected vesting period of 2.83 years, based on the various quartiles of comparable market performance. During the fiscal year ended June 30, 2016, we granted market-based awards with fair values ranging from $2.93 to $5.07, all with an expected vesting period of 3.83 years, based on the various quartiles of comparative market performance. During the fiscal year ended June 30, 2015, we granted market-based awards with fair values ranging from $4.26 to $8.40 with expected vesting periods of 2.55 to 3.30 years, based on the various quartiles of comparative market performance. Compensation expense for market-based awards is recognized over the expected vesting period using the straight-line method, so long as the award holder remains an employee of the Company. Total compensation expense is based on the fair value of the awards at the date of grant and is independent of vesting or expiration of the awards, except for termination of service. Unvested Restricted Stock awards at June 30, 2017 consisted of the following:
Award Type | Number of Restricted Shares |  | Weighted Average Grant-Date Fair Value
Service-based awards | 217,922 |  |  | $ | 7.03 |
Performance-based awards | 54,475 |  |  | 5.67 |
Market-based awards | 119,227 |  |  | 4.97 |
Unvested Restricted Stock at June 30, 2017 | 391,624 |  |  | $ | 6.22 |
The following table sets forth the Restricted Stock transactions for the year ended June 30, 2017:
| Number of Restricted Shares |  | Weighted Average Grant-Date Fair Value |  | Unamortized Compensation Expense at June 30, 2017 |  | Weighted Average Remaining Amortization Period (Years)
Unvested at July 1, 2016 | 406,848 |  |  | $ | 6.74 |  |  | $ | — |  |  |
Service-based awards granted | 86,563 |  |  | 7.02 |  |  |  |  |
Performance-based awards granted | 54,475 |  |  | 5.67 |  |  |  |  |
Market-based awards granted | 54,475 |  |  | 5.44 |  |  |  |  |
Vested | (210,737 | ) |  | 7.22 |  |  |  |  |
Unvested Restricted Stock at June 30, 2017 | 391,624 |  |  | $ | 6.22 |  |  | $ | 1,648,297 |  |  | 2.0
During the years ended June 30, 2017, 2016, and 2015, there were 210,737, 86,719, and 91,306 shares of Restricted Stock that vested with a total grant date fair value of $1,520,569, $757,229, and $766,970, respectively. Unvested Contingent Restricted Stock awards at June 30, 2017 consisted of the following:
Award Type |  | Number of Contingent Restricted Shares |  | Weighted Average Grant-Date Fair Value
Performance-based awards |  | 39,403 |  |  | $ | 7.02 |
Market-based awards |  | 73,867 |  |  | 3.37 |
Unvested Contingent Restricted Stock at June 30, 2017 |  | 113,270 |  |  | $ | 4.64 |
The following table summarizes Contingent Restricted Stock activity:
| Number of Restricted Stock Units |  | Weighted Average Grant-Date Fair Value |  | Unamortized Compensation Expense at June 30, 2017 (1) |  | Weighted Average Remaining Amortization Period (Years)
Unvested at July 1, 2016 | 91,172 |  |  | $ | 5.21 |  |  |  |  |
Performance-based awards granted | 27,237 |  |  | 5.67 |  |  |  |  |  |
Market-based awards granted | 27,237 |  |  | 3.42 |  |  |  |  |  |
Vested | (32,376 | ) |  | $ | 6.09 |  |  |  |  |
Unvested Contingent Restricted Stock at June 30, 2017 | 113,270 |  |  | $ | 4.64 |  |  | $ | 121,668 |  |  | 2.1
(1) Excludes $276,702 of potential future compensation expense for 39,403 shares of performance-based awards for which vesting is not considered probable at this time for accounting purposes. Stock-based Compensation Expense For the years ended June 30, 2017, 2016, and 2015, we recognized stock-based compensation expense related to Restricted Stock and Contingent Restricted Stock grants of $1,180,618, $1,809,548, and $943,653, respectively. Expense for June 30, 2016 includes $59,339 of stock-based compensation that was incurred in a restructuring.

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- Definition The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -URI http://asc.fasb.org/topic&trid=2228938 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 50 -URI http://asc.fasb.org/subtopic&trid=2208855 + Details
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