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CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares
Dec. 31, 2019
Jun. 30, 2019
CONSOLIDATED BALANCE SHEETS    
Common stock, par value (in dollars per share) $ 0.001 $ 0.001
Common stock, authorized shares 100,000,000 100,000,000
Common stock, issued shares 39,851,828 38,969,518
Common stock, outstanding shares 38,698,403 38,010,714
Treasury stock, shares 1,153,425 958,804