Annual report pursuant to Section 13 and 15(d)

Acquisitions and Divestitures - Purchase Price Allocation and Other Disclosures (Details)

v2.4.0.6
Acquisitions and Divestitures - Purchase Price Allocation and Other Disclosures (Details)
 0 Months Ended 12 Months Ended
Jun. 30, 2012
USD ($)
Sep. 02, 2011
USD ($)
Jun. 30, 2011
USD ($)
Sep. 06, 2011
Lease Purchase and Sale and Participation Agreement with VAALCO Energy
USD ($)
Jun. 30, 2012
Santos Sales Agreement
USD ($)
Jun. 30, 2012
Nautilus Purchase and Sale Agreement (PSA)
USD ($)
Sep. 23, 2011
Nautilus Purchase and Sale Agreement (PSA)
Sep. 02, 2011
Nautilus Purchase and Sale Agreement (PSA)
USD ($)
Sep. 02, 2011
NT non-controlling interest in NP
USD ($)
Sep. 02, 2011
NT working interest in Poplar
USD ($)
Sep. 02, 2011
ER non-controlling interest in NP
USD ($)
Sep. 02, 2011
Maximum
Nautilus Purchase and Sale Agreement (PSA)
USD ($)
Sep. 02, 2011
J. Thomas Wilson
Nautilus Purchase and Sale Agreement (PSA)
May 25, 2012
Mereenie Operating Joint Venture
Santos Sales Agreement
May 25, 2012
Mereenie Pipeline Joint Venture
Santos Sales Agreement
May 25, 2012
Palm Valley Joint Venture
Santos Sales Agreement
May 25, 2012
Dingo Joint Venture
Santos Sales Agreement
Jul. 22, 2011
Evans Shoal
AUD
Jun. 30, 2010
Evans Shoal
Disposal Group, Other Information [Abstract]                                      
Equity Method Investment, Ownership Percentage                                     40.00%
Disposal Group, Refund Received for Deposit                                   10,000,000  
Ownership Interest Sold                           35.00% 35.00%        
Ownership Interest Sold by Third Party                               48.00% 66.00%    
Goodwill, Written off Related to Sale of Business Unit         2,521,000                            
Working Interest Sold       65.00%                              
Disposal Group, Cost of Disposed Entity [Abstract]                                      
Consideration received, net purchase price per Santos SA       5,000,000 25,493,000                            
Consideration received, purchase price adjustments         1,138,000                            
Transaction costs       (162,000)                              
Consideration received total         26,631,000                            
Disposal Group, Consideration Received Allocation [Abstract]                                      
Allocation of the consideration received, proved oil and gas properties (Palm Valley)         3,403,000                            
Allocation of the consideration received, unproved oil and gas properties (Dingo)         2,957,000                            
Allocation of the consideration received, land, buildings, and equipment (Palm Valley)         370,000                            
Total allocation of the fair value received         6,730,000                            
Mereenie liabilities given up, net         2,805,000                            
Net book value allocated to Deep Intervals       (829,000)                              
Gain on sale of assets       4,009,000 36,166,000                            
Business Acquisition, Cost of Acquired Entity [Abstract]                                      
Consideration paid to Sellers, cash consideration   4,000,000 [1]           4,000,000 [1] 1,920,000 [1] 823,000 [1] 1,257,000 [1]                
Consideration paid to Sellers, share consideration   1,822,000 [1],[2]           2,000,000 907,000 [1],[2] 389,000 [1],[2] 526,000 [1],[2]                
Consideration paid to Sellers, fair value of contingent consideration payable   4,151,000 [1]             1,993,000 [1] 854,000 [1] 1,304,000 [1] 5,000,000              
Consideration paid to Sellers, total   9,973,000 [1]             4,820,000 [1] 2,066,000 [1] 3,087,000 [1]                
Share Consideration Paid, Par Value               $ 0.01                      
Share Consideration Paid, Shares             1,182,742                        
Related Party Interest in Cash Consideration Paid                         52.00%            
Contingent consideration payable 4,072,000   0     4,070,000                          
Share Consideration Paid, Per Share               $ 1.54                      
Business Acquisition, Purchase Price Allocation [Abstract]                                      
Recognized amount of identifiable assets acquired and liabilities assumed for Business combination, oil and gas assets (proved)   1,462,000                                  
Recognized amount of identifiable assets acquired and liabilities assumed for Business combination, oil and gas assets - Deep Intervals (unproved)   679,000                                  
Recognized amount of identifiable assets acquired and liabilities assumed for Business combination, ARO liability   (75,000)                                  
Recognized amount of identifiable assets acquired and liabilities assumed for Business combination, total   $ 2,066,000                                  
[1] Excludes transaction costs.
[2] Common stock valued at $1.54 per share closing price on the date of the transaction.