Registration of securities issued in business combination transactions

Merger with Tellurian (Detail)

v3.6.0.2
Merger with Tellurian (Detail)
 12 Months Ended
Jun. 30, 2016
USD ($)
$ / shares
Sep. 30, 2016
$ / shares
Aug. 02, 2016
USD ($)
$ / shares
Jun. 30, 2015
$ / shares
Business Acquisition [Line Items]        
Common stock, par value (in dollars per share) | $ / shares $ 0.01 $ 0.01   $ 0.01
Foreign tax credit carry forward $ 9,100,000      
Potential offset to taxable income $ 26,800,000      
Merger Agreement        
Business Acquisition [Line Items]        
Exchange of shares, conversion ratio     1.300  
Tellurian | Merger Agreement        
Business Acquisition [Line Items]        
Common stock, par value (in dollars per share) | $ / shares     $ 0.001  
Termination fee, maximum     $ 1,000,000  
Reverse termination fee     $ 1,000,000  
Magellan Petroleum UK (MPUK) | Merger Agreement        
Business Acquisition [Line Items]        
Common stock, par value (in dollars per share) | $ / shares     $ 0.01