Annual report pursuant to Section 13 and 15(d)

Oil and Gas Activities (Unaudited) (Details)

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Oil and Gas Activities (Unaudited) (Details) - USD ($)
3 Months Ended 12 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Jun. 30, 2015
Jun. 30, 2014
Capitalized Costs Relating to Oil and Gas Producing Activities, by Geographic Area [Line Items]        
Exploration costs previously capitalized     $ 20,000 $ 733,000
Costs capitalized for exploratory wells     0  
United Kingdom        
Capitalized Costs Relating to Oil and Gas Producing Activities, by Geographic Area [Line Items]        
Exploration costs previously capitalized $ 20,000 $ 700,000    
Capitalized costs related to petroleum license     $ 700,000