Quarterly report pursuant to Section 13 or 15(d)

Oil and Gas Activities (Details)

v2.4.1.9
Oil and Gas Activities (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Jun. 30, 2014
Costs Incurred, Oil and Gas Property Acquisition, Exploration, and Development Activities [Line Items]    
Proved oil and gas properties $ 29,700us-gaap_ProvedOilAndGasPropertySuccessfulEffortMethod $ 29,335us-gaap_ProvedOilAndGasPropertySuccessfulEffortMethod
Unproved oil and gas properties 727us-gaap_UnprovedOilAndGasPropertySuccessfulEffortMethod 550us-gaap_UnprovedOilAndGasPropertySuccessfulEffortMethod
Wells in progress 26,169us-gaap_ConstructionInProgressGross 21,296us-gaap_ConstructionInProgressGross
United States    
Costs Incurred, Oil and Gas Property Acquisition, Exploration, and Development Activities [Line Items]    
Proved oil and gas properties 29,700us-gaap_ProvedOilAndGasPropertySuccessfulEffortMethod
/ us-gaap_StatementGeographicalAxis
= country_US
29,335us-gaap_ProvedOilAndGasPropertySuccessfulEffortMethod
/ us-gaap_StatementGeographicalAxis
= country_US
Less accumulated depletion, depreciation, amortization, and accretion (3,898)us-gaap_OilAndGasPropertySuccessfulEffortMethodAccumulatedDepreciationDepletionAndAmortization
/ us-gaap_StatementGeographicalAxis
= country_US
(3,575)us-gaap_OilAndGasPropertySuccessfulEffortMethodAccumulatedDepreciationDepletionAndAmortization
/ us-gaap_StatementGeographicalAxis
= country_US
Total net proved oil and gas properties 25,802us-gaap_OilAndGasPropertySuccessfulEffortMethodNet
/ us-gaap_StatementGeographicalAxis
= country_US
25,760us-gaap_OilAndGasPropertySuccessfulEffortMethodNet
/ us-gaap_StatementGeographicalAxis
= country_US
Unproved oil and gas properties 469us-gaap_UnprovedOilAndGasPropertySuccessfulEffortMethod
/ us-gaap_StatementGeographicalAxis
= country_US
268us-gaap_UnprovedOilAndGasPropertySuccessfulEffortMethod
/ us-gaap_StatementGeographicalAxis
= country_US
Wells in progress 24,406us-gaap_ConstructionInProgressGross
/ us-gaap_StatementGeographicalAxis
= country_US
19,686us-gaap_ConstructionInProgressGross
/ us-gaap_StatementGeographicalAxis
= country_US
Australia    
Costs Incurred, Oil and Gas Property Acquisition, Exploration, and Development Activities [Line Items]    
Unproved oil and gas properties 0us-gaap_UnprovedOilAndGasPropertySuccessfulEffortMethod
/ us-gaap_StatementGeographicalAxis
= country_AU
0us-gaap_UnprovedOilAndGasPropertySuccessfulEffortMethod
/ us-gaap_StatementGeographicalAxis
= country_AU
United Kingdom    
Costs Incurred, Oil and Gas Property Acquisition, Exploration, and Development Activities [Line Items]    
Unproved oil and gas properties 258us-gaap_UnprovedOilAndGasPropertySuccessfulEffortMethod
/ us-gaap_StatementGeographicalAxis
= country_GB
282us-gaap_UnprovedOilAndGasPropertySuccessfulEffortMethod
/ us-gaap_StatementGeographicalAxis
= country_GB
Wells in progress $ 1,763us-gaap_ConstructionInProgressGross
/ us-gaap_StatementGeographicalAxis
= country_GB
$ 1,610us-gaap_ConstructionInProgressGross
/ us-gaap_StatementGeographicalAxis
= country_GB