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CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - $ / shares
Sep. 30, 2020
Jun. 30, 2020
Series D redeemable convertible preferred stock, par value (in dollars per share) $ 0.1 $ 0.1
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) $ 0.1 $ 0.1
Common stock, authorized 210,000,000 210,000,000
Common stock, issued 104,027,915 103,988,707
Common stock, outstanding 67,757,900 67,718,692
Treasury stock, shares 36,270,015 36,270,015