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CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - $ / shares
Dec. 31, 2019
Jun. 30, 2019
Statement Of Financial Position [Abstract]    
Redeemable convertible preferred stock,Shares authorized 0 106,090,000
Redeemable convertible preferred stock,Shares issued 0 52,435,000
Redeemable convertible preferred stock,Shares outstanding 0 52,435,000
Preferred stock, par value $ 0.00001 $ 0.00001
Preferred stock, Shares authorized 10,000 10,000
Preferred stock, Shares issued 0 0
Preferred stock, Shares outstanding 0 0
Common stock, par value $ 0.00001 $ 0.00001
Common stock, Shares authorized 500,000 169,300
Common stock, Shares issued 72,267 8,154
Common stock, Shares outstanding 72,267 8,154