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Stock-Based Compensation (Details) (USD $)
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3 Months Ended | 3 Months Ended | 3 Months Ended | 0 Months Ended | 3 Months Ended | 0 Months Ended | 3 Months Ended | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Sep. 30, 2014
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Sep. 30, 2013
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Sep. 30, 2014
Restricted Stock
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Sep. 30, 2014
PBOs
CO2-EOR Pilot Program at Poplar
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Sep. 30, 2014
PBOs
CO2-EOR Development Project at Poplar
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Sep. 30, 2014
PBOs
Sale of Substantially All of the Amadeus Basin Assets
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Sep. 30, 2014
PBOs
Approval of a Farmout Agreement or Participation in Drilling a Well in the Weald Basin
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Sep. 30, 2014
PBOs
Approval of a Farmout Agreement in the Bonaparte Basin
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Sep. 30, 2014
Employee Stock Option
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Sep. 30, 2014
Market Based Options
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Jan. 16, 2013
Employee Stock Option
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Jan. 16, 2013
RSUs
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Sep. 30, 2014
2012 Stock Incentive Plan
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Jan. 16, 2013
2012 Stock Incentive Plan
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Sep. 30, 2014
2012 Stock Incentive Plan
Market Based Options
trading_day
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Sep. 30, 2014
1998 Stock Incentive Plan
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Dec. 08, 2010
1998 Stock Incentive Plan
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Sep. 30, 2014
1998 Stock Incentive Plan
Employee Stock Option
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Jul. 01, 2014
Non-employee Directors
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Sep. 30, 2014
Non-employee Directors
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Jul. 01, 2014
Non-employee Directors
Common Stock
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Aug. 15, 2014
Vice President
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Aug. 15, 2014
Vice President
RSUs
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Sep. 30, 2014
Selling, General and Administrative Expense
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Sep. 30, 2013
Selling, General and Administrative Expense
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Sep. 30, 2014
Selling, General and Administrative Expense
Prior Period Awards [Member]
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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 | |||||||||||||||||||||||||
| Performance metrics weighted average | 10.00% | 40.00% | 20.00% | 20.00% | 10.00% | |||||||||||||||||||||
| Per share closing price (in dollars per share) | $ 2.35 | |||||||||||||||||||||||||
| Number of consecutive trading days | 10 | |||||||||||||||||||||||||
| Median stock price (in dollars per share) | $ 2.35 | |||||||||||||||||||||||||
| Median stock price, maintenance period | 90 days | |||||||||||||||||||||||||
| Number of stock options exercised | 288,541 | 0 | 21,875 | |||||||||||||||||||||||
| Issuance of common stock (in shares) | 225,235 | |||||||||||||||||||||||||
| Number of stock options forfeited | 980,210 | 0 | ||||||||||||||||||||||||
| Nonvested options outstanding (in shares) | 1,728,124 | |||||||||||||||||||||||||
| Market based and performance based shares available for future issuance | 819,323 | |||||||||||||||||||||||||
| Share-based compensation expense | $ (44,000) | $ (320,000) | $ 245,000 | $ 44,000 | $ 700,000 | $ 163,000 | ||||||||||||||||||||
| Unrecorded expected future compensation expense related to stock option awards | $ 800,000 | |||||||||||||||||||||||||
| Grants in period | 96,330 | |||||||||||||||||||||||||
| Unvested options forfeited | 980,210 | |||||||||||||||||||||||||
| Unvested RSUs forfeited | 100,000 | |||||||||||||||||||||||||