Quarterly report pursuant to Section 13 or 15(d)

Sale of Amadeus Basin Assets (Details)

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Sale of Amadeus Basin Assets (Details) (AUD)
 0 Months Ended 3 Months Ended 6 Months Ended
Apr. 15, 2014
Mar. 31, 2014
Sep. 30, 2014
Mar. 31, 2014
Central Petroleum Limited
        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Ownership percentage     11.00%  
Amadeus Basin
        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Proceeds from first and second cash installment for the sale of Amadeus Basin assets 5,000,000 15,000,000    
Amount excluded form reimbursement of capital expenditures       485,000
Discount rate     10.00%  
Amadeus Basin | Maximum
        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Bonus discharge amount     7,000,000.0  
Amadeus Basin | Palm Valley
        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Royalty rate     25.00%  
AUD/Gigajoule gas price trigger for first ten years     5.00  
AUD/Gigajoule gas price trigger for following five years     6.00  
Amadeus Basin | Central Petroleum Limited
        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Shares issued during period for acquisitions   39,500,000.0