|
Stock Based Compensation - Additional Information (Details) (USD $)
|
12 Months Ended | 12 Months Ended | 12 Months Ended | ||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Jun. 30, 2014
|
Jun. 30, 2013
|
Jun. 30, 2014
Director
|
Jun. 30, 2014
2012 Stock Incentive Plan
|
Jan. 16, 2013
2012 Stock Incentive Plan
|
Dec. 08, 2010
1998 Stock Incentive Plan
|
Jan. 16, 2013
Restricted Stock Units (RSUs)
2012 Stock Incentive Plan
|
Jun. 30, 2014
Other Options
|
Jun. 30, 2014
In-the-money stock options
2012 Stock Incentive Plan
|
Jan. 16, 2013
In-the-money stock options
2012 Stock Incentive Plan
|
Jun. 30, 2014
Performance Based Options
|
Jun. 30, 2014
Performance Based Options
2012 Stock Incentive Plan
|
Jun. 30, 2014
Market Based Options
|
Jun. 30, 2014
Market Based Options
2012 Stock Incentive Plan
trading_day
|
Jun. 30, 2014
CO2-EOR Pilot Program at Poplar
2012 Stock Incentive Plan
|
Jun. 30, 2014
CO2-EOR Development Project at Poplar
2012 Stock Incentive Plan
|
Jun. 30, 2014
Sale of Substantially All of the Amadeus Basin Assets
2012 Stock Incentive Plan
|
Jun. 30, 2014
Approval of a Farmout Agreement or Participation in Drilling a Well in the Weald Basin
2012 Stock Incentive Plan
|
Jun. 30, 2014
Approval of a Farmout Agreement in the Bonaparte Basin
2012 Stock Incentive Plan
|
|||||||
| 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 | 500,000 | 1,000,000 | |||||||||||||||||||||||
| Expiration term | 10 years | ||||||||||||||||||||||||
| Number of options | 3,000,000 | 1,627,500 | 3,000,000 | 0 | 1,500,000 | [1] | 1,500,000 | 1,500,000 | [2] | 1,500,000 | |||||||||||||||
| Performance metrics weighted average | 10.00% | 40.00% | 20.00% | 20.00% | 10.00% | ||||||||||||||||||||
| Per share closing price (usd per share) | $ 2.35 | ||||||||||||||||||||||||
| Number of consecutive trading days | 10 | ||||||||||||||||||||||||
| Median stock price (usd per share) | $ 2.35 | ||||||||||||||||||||||||
| Market based or performance based options, not vested (in shares) | 2,175,000 | ||||||||||||||||||||||||
| Market based and performance based shares available for future issuance (in shares) | 365,107 | ||||||||||||||||||||||||
| Fair value of stock options vesting | $ 1,200,000 | $ 800,000 | |||||||||||||||||||||||
| Stock options exercised (in shares) | 275,000 | 0 | |||||||||||||||||||||||
| Common shares from options exercised, net of shares withheld for tax obligations (in shares) | 231,015 | ||||||||||||||||||||||||
| Cash received from the exercise of stock options | 201,000 | 0 | |||||||||||||||||||||||
| Share-based compensation expense | 2,000,000 | 800,000 | |||||||||||||||||||||||
| Unrecognized stock compensation expense related to options granted | $ 1,200,000 | ||||||||||||||||||||||||
| Weighted average cost recognition period | 1 year 8 months 12 days | ||||||||||||||||||||||||
| Additional options expected to vest | 1,315,832 | ||||||||||||||||||||||||
| Grants in period (in shares) | 266,664 | ||||||||||||||||||||||||
|
|||||||||||||||||||||||||