Quarterly report pursuant to Section 13 or 15(d)

Oil and Gas Activities (Costs Incurred in Oil and Gas Property Acquisition, Exploration and Development Activities) (Details)

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Oil and Gas Activities (Costs Incurred in Oil and Gas Property Acquisition, Exploration and Development Activities) (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 12 Months Ended
Sep. 30, 2014
Jun. 30, 2014
Costs Incurred, Oil and Gas Property Acquisition, Exploration, and Development Activities [Line Items]    
Proved oil and gas properties $ 29,506 $ 29,335
Less accumulated depletion, depreciation, amortization, and accretion (3,733) (3,575)
Total net proved oil and gas properties 25,773 25,760
Unproved oil and gas properties 538 550
Wells in progress 24,942 21,296
United States
   
Costs Incurred, Oil and Gas Property Acquisition, Exploration, and Development Activities [Line Items]    
Proved oil and gas properties 29,506 29,335
Less accumulated depletion, depreciation, amortization, and accretion (3,733) (3,575)
Unproved oil and gas properties 268 268
Wells in progress 23,127 19,686
Australia
   
Costs Incurred, Oil and Gas Property Acquisition, Exploration, and Development Activities [Line Items]    
Unproved oil and gas properties 1 0
United Kingdom
   
Costs Incurred, Oil and Gas Property Acquisition, Exploration, and Development Activities [Line Items]    
Unproved oil and gas properties 269 282
Wells in progress $ 1,815 $ 1,610