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Stock Based Compensation Allocation of Recognized Period Costs (Details) (USD $)
3 Months Ended 9 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Mar. 31, 2013
Mar. 31, 2012
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Total stock-based compensation expense $ 185,522 $ 50,476 $ 1,151,370 $ 200,735
Exploration expenses [Member]
       
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Total stock-based compensation expense 57,982 12,022 293,206 46,305
Stock-based compensation expense [Member]
       
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Total stock-based compensation expense $ 127,540 $ 38,454 $ 858,164 $ 154,430