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CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - $ / shares
Sep. 30, 2019
Jun. 30, 2019
Series D redeemable convertible preferred stock, par value (in dollars per share) $ 0.10 $ 0.10
Series D redeemable convertible preferred stock, authorized 3,636 3,636
Series D redeemable convertible preferred stock, issued 0 0
Series D redeemable convertible preferred stock, outstanding 0 0
Common stock, par value (in dollars per share) $ 0.10 $ 0.10
Common stock, authorized 210,000,000 210,000,000
Common stock, issued 103,717,526 103,642,292
Common stock, outstanding 68,317,521 68,624,566
Treasury stock, shares 35,400,005 35,017,726