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Accrued Liabilities and Other (Details) - USD ($)
Dec. 31, 2017
Jun. 30, 2017
Other Liabilities, Current [Abstract]    
Accrued incentive and other compensation $ 292,382 $ 413,113
Accrued severance payments 46,719 0
Asset retirement obligations due within one year 35,539 35,115
Accrued royalties, including suspended accounts 11,524 17,708
Accrued franchise taxes 82,800 150,062
Accrued ad valorem taxes 191,503 108,641
Accrued liabilities and other $ 660,467 $ 724,639