Quarterly report pursuant to Section 13 or 15(d)

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

v3.5.0.2
Discontinued Operations (Adjusted carrying amounts of the major classes of assets and liabilities) (Details) - USD ($)
$ in Thousands
 3 Months Ended
Aug. 11, 2016
Aug. 01, 2016
Sep. 30, 2016
Sep. 30, 2015
Jun. 30, 2016
Disposal Group, Including Discontinued Operation, Liabilities [Abstract]          
Contribution to equity from preferred stockholder $ 9,892      
Gain on disposal of discontinued operations, net of tax 1,069 $ 1,069 $ 0  
Discontinued Operations, Held-for-sale          
Disposal Group, Including Discontinued Operation, Assets, Current [Abstract]          
Cash     0   $ 141
Accounts receivable     198   249
Inventories     537   533
Other classes of current assets that are not major     38   34
Disposal Group, Including Discontinued Operation, Assets, Noncurrent [Abstract]          
Property and equipment, net     25,089   24,753
Other classes of assets that are not major     204   332
Total assets of the disposal groups     26,066   26,042
Disposal Group, Including Discontinued Operation, Liabilities [Abstract]          
Accounts payable     2,117   2,264
Note payable     5,500   5,500
Asset retirement obligations     2,818   2,818
Other classes of liabilities that are not major     55   56
Total liabilities of the disposal groups     10,490   10,638
Secured promissory note forgiven 0 625      
Cash received 586 900      
Stock of UKOG received 925 0      
Total consideration 1,511 25,026      
CO2 Business | Discontinued Operations, Held-for-sale          
Disposal Group, Including Discontinued Operation, Assets, Current [Abstract]          
Cash     0   141
Accounts receivable     198   249
Inventories     242   232
Other classes of current assets that are not major     38   34
Disposal Group, Including Discontinued Operation, Assets, Noncurrent [Abstract]          
Property and equipment, net     24,294   23,941
Other classes of assets that are not major     204   332
Total assets of the disposal groups     24,976   24,929
Disposal Group, Including Discontinued Operation, Liabilities [Abstract]          
Accounts payable     1,469   1,594
Note payable     5,500   5,500
Asset retirement obligations     2,818   2,818
Other classes of liabilities that are not major     55   56
Total liabilities of the disposal groups     9,842   9,968
Weald Basin | Discontinued Operations, Held-for-sale          
Disposal Group, Including Discontinued Operation, Assets, Current [Abstract]          
Cash     0   0
Accounts receivable     0   0
Inventories     295   301
Other classes of current assets that are not major     0   0
Disposal Group, Including Discontinued Operation, Assets, Noncurrent [Abstract]          
Property and equipment, net     795   812
Other classes of assets that are not major     0   0
Total assets of the disposal groups     1,090   1,113
Disposal Group, Including Discontinued Operation, Liabilities [Abstract]          
Accounts payable     648   670
Note payable     0   0
Asset retirement obligations     0   0
Other classes of liabilities that are not major     0   0
Total liabilities of the disposal groups     $ 648   $ 670
Series A Preferred Stock | Discontinued Operations, Held-for-sale          
Disposal Group, Including Discontinued Operation, Liabilities [Abstract]          
Series A Preferred Stock exchanged $ 0 $ 23,501