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Consolidated Statements of Operations (Parenthetical) - USD ($)
12 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2016
Non-cash stock-based compensation expense $ 1,366,764 $ 1,180,618 $ 1,809,548
General and Administrative Expense      
Non-cash stock-based compensation expense $ 1,366,764 $ 1,180,618 $ 1,750,209