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Income Taxes - Narrative (Details) - USD ($)
 1 Months Ended 12 Months Ended
Sep. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2014
Operating Loss Carryforwards [Line Items]        
Unrecognized tax benefits   $ 0 $ 0 $ 0
Statutory tax rate   34.00%    
Tax loss carryforwards from exercise of options and warrants   $ 25,300,000    
Tax benefits related to stock-based compensation   9,650,657 $ 1,633,946 $ 509,096
Net loss for state tax purposes $ 19,100,000      
Mineral Property Depletion        
Operating Loss Carryforwards [Line Items]        
Depletion carryforward   5,000,000    
Federal        
Operating Loss Carryforwards [Line Items]        
Tax loss carryforward from reverse merger   1,200,000    
Carryforward from reverse merger   300,000    
Annual amount of carryforward from reverse merger through 2023   $ 39,648    
State        
Operating Loss Carryforwards [Line Items]        
Net loss for state tax purposes 24,200,000      
Louisiana | State        
Operating Loss Carryforwards [Line Items]        
Income tax refund 1,500,000      
Interest on refund recorded as a deduction of current income tax expense $ 57,467