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Stock Based Compensation (Details) (USD $)
In Millions, except Share data, unless otherwise specified |
6 Months Ended | 0 Months Ended | 3 Months Ended | 6 Months Ended | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Dec. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2013
PBOs
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Dec. 31, 2013
PBOs
CO2-EOR Pilot Program at Poplar
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Dec. 31, 2013
PBOs
CO2-EOR Development Project at Poplar
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Dec. 31, 2013
PBOs
Sale of Substantially All of the Amadeus Basin Assets
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Dec. 31, 2013
PBOs
Approval of a Farmout Agreement or Participation in Drilling a Well in the Weald Basin
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Dec. 31, 2013
PBOs
Approval of a Farmout Agreement in the Bonaparte Basin
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Dec. 31, 2013
Market Based
|
Jul. 02, 2013
Restricted Stock
Executive Officers
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Dec. 31, 2013
Common Stock
Non-employee Directors
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Jan. 16, 2013
Employee Stock Option
|
Jan. 16, 2013
RSUs
|
Dec. 31, 2013
2012 Stock Incentive Plan
|
Jan. 16, 2013
2012 Stock Incentive Plan
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Dec. 08, 2010
1998 Stock Incentive Plan
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||||||||||||||
| Number of shares authorized | 5,000,000 | 288,435 | ||||||||||||||
| Maximum number of shares allowed to be issued each year | 1,000,000 | 500,000 | ||||||||||||||
| Expiration term | 10 years | |||||||||||||||
| Grants in period (in shares) | 1,500,000 | 1,500,000 | 3,000,000 | |||||||||||||
| Performance metrics weighted average | 10.00% | 40.00% | 20.00% | 20.00% | 10.00% | |||||||||||
| Minimum per share closing price for vesting (in dollars per share) | $ 2.35 | |||||||||||||||
| Share-based compensation expense | $ 1.1 | $ 0.6 | ||||||||||||||
| Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized | $ 1.9 | |||||||||||||||
| Grants in period | 450,000 | 266,664 | ||||||||||||||