Annual report pursuant to Section 13 and 15(d)

Discontinued Operations - Summarized Results of Company's Discontinued Operations (Details)

v3.5.0.2
Discontinued Operations - Summarized Results of Company's Discontinued Operations (Details) - Discontinued Operations, Held-for-sale - USD ($)
$ in Thousands
 12 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Revenue $ 1,990 $ 4,459
Operating, exploration and general and administrative expenses 3,431 7,078
Depletion, depreciation, amortization and accretion 651 1,001
Exploration 0 0
Impairment expense 11,280 18,027
General and administrative 0 0
Interest expense and other disposal costs 926 168
Total expenses 16,288 26,274
Non-controlling interest 49 411
Loss from discontinued operations before tax (14,249) (21,404)
CO2 Business    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Revenue 1,990 4,459
Operating, exploration and general and administrative expenses 3,070 6,708
Depletion, depreciation, amortization and accretion 651 1,001
Exploration 0 0
Impairment expense 11,280 18,027
General and administrative 0 0
Interest expense and other disposal costs 926 168
Total expenses 15,927 25,904
Non-controlling interest 49 411
Loss from discontinued operations before tax (13,888) (21,034)
Weald Basin    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Revenue 0 0
Operating, exploration and general and administrative expenses 361 370
Depletion, depreciation, amortization and accretion 0 0
Exploration 0 0
Impairment expense 0 0
General and administrative 0 0
Interest expense and other disposal costs 0 0
Total expenses 361 370
Non-controlling interest 0 0
Loss from discontinued operations before tax $ (361) $ (370)