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EQUITY INCENTIVE PLAN - Reconciliation of restricted stock activity (Details)
3 Months Ended
Jan. 31, 2020
$ / shares
shares
Number of Shares  
Unvested at October 31, 2019 | shares 200,482
Shares or units granted | shares 84,981
Shares or units vested | shares (35,926)
Shares or units cancelled | shares (10,164)
Shares or units withheld | shares (13,369)
Unvested at January 31, 2020 | shares 226,004
Weighted Average Grant Date Fair Value  
Unvested at October 31, 2019 | $ / shares $ 39.62
Shares or units granted | $ / shares 40.45
Shares or units vested | $ / shares 37.62
Shares or units cancelled | $ / shares 40.88
Shares or units withheld | $ / shares 37.38
Unvested at January 31, 2020 | $ / shares $ 40.33