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Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - $ / shares
Dec. 31, 2019
Jun. 30, 2019
Statement Of Financial Position [Abstract]    
Common stock, par value $ 0.001 $ 0.001
Common stock, shares authorized 100,000,000 100,000,000
Common stock, shares issued 51,636,757 50,518,460
Common stock, shares outstanding 51,636,757 50,518,460