Annual report pursuant to Section 13 and 15(d)

Basis of Presentation - Additional Information (Details)

v3.5.0.2
Basis of Presentation - Additional Information (Details)
 3 Months Ended 12 Months Ended
Mar. 31, 2016
USD ($)
Mar. 30, 2016
customer
Jul. 10, 2015
May 17, 2013
Mar. 31, 2016
USD ($)
Jun. 30, 2016
USD ($)
segment
customer
$ / shares
shares
Jun. 30, 2015
USD ($)
$ / shares
Aug. 02, 2016
$ / shares
Jun. 30, 2014
USD ($)
Presentation and Significant Accounting Policies Information [Line Items]                  
Number of operating segments   3       2      
Net loss from operations           $ 5,339,000 $ 8,649,000    
Cash and cash equivalents           $ 1,680,000 $ 769,000   $ 16,120,000
Common stock, par value (usd per share) | $ / shares           $ 0.01 $ 0.01    
Accounts receivable collectability period           2 months      
Allowance for doubtful accounts receivable           $ 0 $ 0    
Impairment of proved oil and gas properties             17,400,000    
Exploration impairment cost           0 20,000    
Goodwill           500,000 500,000    
Impairment of goodwill             674,000    
Uncertain tax positions           $ 0 0    
Number of reportable segments | segment           2      
Shares issued upon conversion | shares           1      
Reverse stock split (usd per share)     0.125     0.125      
Number of major customers | customer           2      
Magellan Petroleum Australia Limited (MPA)                  
Presentation and Significant Accounting Policies Information [Line Items]                  
Goodwill           $ 275,000 275,000    
MPUK                  
Presentation and Significant Accounting Policies Information [Line Items]                  
Goodwill           $ 225,000 $ 225,000    
Minimum                  
Presentation and Significant Accounting Policies Information [Line Items]                  
Useful lives of assets           3 years      
Maximum                  
Presentation and Significant Accounting Policies Information [Line Items]                  
Maturity period of cash equivalents           3 months      
Useful lives of assets           15 years      
Central Petroleum Limited                  
Presentation and Significant Accounting Policies Information [Line Items]                  
Ownership percentage           1.90%      
One Stone Exchange Agreement                  
Presentation and Significant Accounting Policies Information [Line Items]                  
Asset impairment charges $ 11,300,000         $ 11,300,000      
Impairment of proved oil and gas properties 7,800,000       $ 7,800,000        
Exploration impairment cost $ 3,400,000       $ 3,400,000        
One Stone Exchange Agreement | Utah CO2 LLC                  
Presentation and Significant Accounting Policies Information [Line Items]                  
Majority interest percentage           51.00%      
Merger Agreement | Subsequent Event                  
Presentation and Significant Accounting Policies Information [Line Items]                  
Common stock, exchange of shares, shares (per share)               1.300  
Merger Agreement | Subsequent Event | Tellurian                  
Presentation and Significant Accounting Policies Information [Line Items]                  
Common stock, par value (usd per share) | $ / shares               $ 0.001  
Merger Agreement | Subsequent Event | Magellan                  
Presentation and Significant Accounting Policies Information [Line Items]                  
Common stock, par value (usd per share) | $ / shares               $ 0.01  
Nautilus Poplar, LLC (NP)                  
Presentation and Significant Accounting Policies Information [Line Items]                  
Ownership percentage, sold in period 100.00%                
Nautilus Poplar, LLC (NP) | One Stone Exchange Agreement                  
Presentation and Significant Accounting Policies Information [Line Items]                  
Ownership percentage, sold in period 100.00%                
Series A Preferred Stock                  
Presentation and Significant Accounting Policies Information [Line Items]                  
Percent of shares transferred 100.00%                
Reverse stock split (usd per share)       9.77586545