Quarterly report pursuant to Section 13 or 15(d)

Discontinued Operations (Adjusted carrying amounts of the major classes of assets and liabilities) (Details)

v3.4.0.3
Discontinued Operations (Adjusted carrying amounts of the major classes of assets and liabilities) (Details) - USD ($)
$ in Thousands
Mar. 31, 2016
Jun. 30, 2015
Disposal Group, Including Discontinued Operation, Assets, Current [Abstract]    
Total current assets held for sale $ 24,248 $ 1,161
CO2 Business | Discontinued Operations, Held-for-sale    
Disposal Group, Including Discontinued Operation, Assets, Current [Abstract]    
Cash 72 282
Accounts receivable 188 504
Inventories 232 298
Other classes of current assets that are not major 68 77
Disposal Group, Including Discontinued Operation, Assets, Noncurrent [Abstract]    
Property and equipment, net 23,352 35,593
Other classes of assets that are not major 336 376
Total assets of the disposal group classified as held for sale in the balance sheet 24,248 37,130
Disposal Group, Including Discontinued Operation, Liabilities [Abstract]    
Accounts payable 1,634 1,751
Note payable 5,500 5,500
Asset retirement obligations 2,774 2,647
Other classes of liabilities that are not major 68 104
Total liabilities of the disposal group classified as held for sale in the balance sheet $ 9,976 $ 10,002