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Consolidated Balance Sheets (Parenthetical) - $ / shares
Jun. 30, 2017
Jun. 30, 2016
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 45,435,836 45,557,295
Common stock, shares outstanding 45,435,836 45,557,295