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Commitments and Contingencies (Detail)
AUD in Millions
3 Months Ended 12 Months Ended
Aug. 02, 2016
USD ($)
shares
Jan. 14, 2013
shares
Sep. 30, 2016
USD ($)
shares
Jun. 30, 2016
USD ($)
Jun. 30, 2015
USD ($)
Jun. 30, 2016
AUD
Apr. 15, 2016
USD ($)
Mar. 31, 2016
USD ($)
Nov. 04, 2015
USD ($)
Jun. 30, 2014
USD ($)
Sep. 30, 2011
USD ($)
Purchase Commitment, Excluding Long-term Commitment [Line Items]                      
Rent expenses       $ 284,000 $ 301,000            
Future contingent production payments payable                     $ 5,000,000
Percent of interest in contingent payments                     52.00%
Accrued income taxes     $ 1,800,000 1,800,000              
Stockholders' Equity Attributable to Parent     2,631,000 (6,989,000) 7,945,000            
Notes payable     104,000 783,000 0            
Stockholders equity     2,631,000 (6,989,000) 7,945,000         $ 45,917,000  
Accrued and Other Liabilities                      
Purchase Commitment, Excluding Long-term Commitment [Line Items]                      
Accrued income taxes       1,800,000 1,700,000            
Prepaid and Other Assets                      
Purchase Commitment, Excluding Long-term Commitment [Line Items]                      
Income taxes receivable       1,800,000 1,700,000            
Pro forma                      
Purchase Commitment, Excluding Long-term Commitment [Line Items]                      
Stockholders' Equity Attributable to Parent       4,100,000              
Notes payable       158,000              
Stockholders equity       3,729,000              
MI3 Petroleum Engineering                      
Purchase Commitment, Excluding Long-term Commitment [Line Items]                      
Contingent Bonuses Payable                 $ 100,000    
NT/P82 Seismic Survey, Completion of Seismic Survey                      
Purchase Commitment, Excluding Long-term Commitment [Line Items]                      
Other commitment | AUD           AUD 9          
Common Stock                      
Purchase Commitment, Excluding Long-term Commitment [Line Items]                      
Stockholders equity     71,000 70,000 $ 69,000         $ 69,000  
One Stone Exchange Agreement | Investor | One Stone                      
Purchase Commitment, Excluding Long-term Commitment [Line Items]                      
Notes payable             $ 625,000        
Sopak Collateral Agreement | Common Stock                      
Purchase Commitment, Excluding Long-term Commitment [Line Items]                      
Number of shares available for purchase (in shares) | shares   1,158,080                  
Sopak Collateral Agreement | Warrant                      
Purchase Commitment, Excluding Long-term Commitment [Line Items]                      
Number of shares available for purchase (in shares) | shares   543,478                  
Contract Termination, Termination Fee | One Stone Exchange Agreement | Investor                      
Purchase Commitment, Excluding Long-term Commitment [Line Items]                      
Estimate of possible loss       750,000              
Contract Termination, Termination Fee | One Stone Exchange Agreement | Investor | One Stone                      
Purchase Commitment, Excluding Long-term Commitment [Line Items]                      
Estimate of possible loss     750,000 750,000       $ 750,000      
Contract Termination, Expense Reimbursement | One Stone Exchange Agreement | Investor | One Stone                      
Purchase Commitment, Excluding Long-term Commitment [Line Items]                      
Estimate of possible loss     $ 200,000 $ 200,000       $ 200,000      
Nautilus Purchase and Sale Agreement (PSA)                      
Purchase Commitment, Excluding Long-term Commitment [Line Items]                      
Future contingent production payments payable                     $ 5,000,000
Nautilus Tech PSA | Common Stock                      
Purchase Commitment, Excluding Long-term Commitment [Line Items]                      
Number of shares available for purchase (in shares) | shares     90,350                
Merger Agreement | Tellurian                      
Purchase Commitment, Excluding Long-term Commitment [Line Items]                      
Termination fee, maximum $ 1,000,000                    
Reverse termination fee $ 1,000,000                    
Merger Agreement | Tellurian | Director                      
Purchase Commitment, Excluding Long-term Commitment [Line Items]                      
Issuance of common stock (in shares) | shares 100,000                    
Director fees $ 150,000                    
Nautilus Poplar, LLC (NP)                      
Purchase Commitment, Excluding Long-term Commitment [Line Items]                      
Percent of interest in contingent payments                     52.00%