Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies - Purchase Obligations (Details)

v3.3.0.814
Commitments and Contingencies - Purchase Obligations (Details)
£ in Thousands, AUD in Thousands
 1 Months Ended 12 Months Ended
Jun. 30, 2015
USD ($)
Jun. 30, 2015
USD ($)
Jun. 30, 2015
GBP (£)
Jun. 30, 2015
AUD
Jun. 30, 2014
USD ($)
Purchase Commitment, Excluding Long-term Commitment [Line Items]          
Accrued income taxes current $ 1,700,000 $ 1,700,000     $ 1,600,000
NT/P82 Seismic Survey, Geotechnical Studies          
Purchase Commitment, Excluding Long-term Commitment [Line Items]          
Estimated costs for other commitments | AUD       AUD 500  
NT/P82 Seismic Survey, Drilling of Exploration Well          
Purchase Commitment, Excluding Long-term Commitment [Line Items]          
Estimated costs for other commitments | AUD       25,000  
NT/P82 Seismic Survey, Completion of Seismic Survey          
Purchase Commitment, Excluding Long-term Commitment [Line Items]          
Estimated costs for other commitments | AUD       AUD 16,000  
J. Thomas Wilson          
Purchase Commitment, Excluding Long-term Commitment [Line Items]          
Percentage of contingent cash payments 52.00% 52.00%   52.00%  
Accrued and Other Liabilities          
Purchase Commitment, Excluding Long-term Commitment [Line Items]          
Accrued income taxes current $ 1,700,000 $ 1,700,000     1,600,000
Prepaid and Other Assets          
Purchase Commitment, Excluding Long-term Commitment [Line Items]          
Amount of income tax liability if not paid by related party 1,700,000 1,700,000     $ 1,600,000
Nautilus Poplar, LLC (NP) | Maximum          
Purchase Commitment, Excluding Long-term Commitment [Line Items]          
Contingent consideration potential cash payment 5,000,000 $ 5,000,000      
Petrie Partners, LLC          
Purchase Commitment, Excluding Long-term Commitment [Line Items]          
Contingent financial adviser fees $ 0        
Contingent financial adviser fees, percentage of transaction 3.00% 3.00%   3.00%  
Mi3          
Purchase Commitment, Excluding Long-term Commitment [Line Items]          
Contingent bonuses payable $ 365,000 $ 365,000      
MPUK          
Purchase Commitment, Excluding Long-term Commitment [Line Items]          
Ownership percentage 50.00% 50.00%   50.00%  
Celtique Claim          
Purchase Commitment, Excluding Long-term Commitment [Line Items]          
Payment sought by plaintiff   $ 2,400,000 £ 1,500    
Percentage above base rate payment 5.00% 5.00%   5.00%  
Closing costs paid by plaintiff   $ 94,000 £ 60    
Capitalized costs related to petroleum license $ 953,000 $ 953,000