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EQUITY INCENTIVE PLAN - Additional Information (Details) - USD ($) |  |  |  | 6 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
Mar. 12, 2020 | Jan. 02, 2020 | Nov. 13, 2019 | Apr. 30, 2020 | Apr. 30, 2019 | Oct. 31, 2019 | Mar. 10, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Stock-based compensation expense |  |  |  | $ 779,000 | $ 1,400,000 |  |
Unrecognized Stock-based compensation expense |  |  |  | $ 4,100,000 |  |  |
Restricted stock granted |  |  |  | 102,761 |  |  |
Restricted stock vested |  |  |  | 47,750 |  |  |
Grant date fair value of restricted stock |  |  |  | $ 39.03 |  | $ 39.62 |
2016 Equity Plan |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Total number of shares of common stock that may be issued as awards under 2016 Plan |  |  |  |  |  |  | 856,048
2008 Equity Plan |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Number of Shares Available for Grant under the 2008 Plan |  |  |  |  |  |  | 386,048
Non-employee Directors and Non-Executive Employees |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Restricted stock granted | 17,780 |  |  |  |  |  |
Grant date fair value of restricted stock | $ 23.62 |  |  |  |  |  |
PSU TSR | Minimum |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Percentage of target number of shares to be earned |  | 50.00% |  |  |  |  |
PSU ROIC | Maximum |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Percentage of target number of shares to be earned |  | 200.00% |  |  |  |  |
PSU ROIC | Minimum |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Percentage of target number of shares to be earned |  | 50.00% |  |  |  |  |
Time Based |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Restricted stock granted |  | 20,837 | 8,052 |  |  |  |
Grant date fair value of restricted stock |  | $ 37.79 | $ 35.75 |  |  |  |
Percentage of incentive compensation arrangement |  | 25.00% |  |  |  |  |
Performance Based |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Restricted stock vested |  | 28,979 |  |  |  |  |
Grant date fair value of restricted stock |  | $ 37.79 |  |  |  |  |
Percentage of incentive compensation arrangement |  | 75.00% |  |  |  |  |
Performance Based | PSU TSR |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Restricted stock granted |  | 26,918 |  |  |  |  |
Grant date fair value of restricted stock |  | $ 46.81 |  |  |  |  |
Percentage of incentive compensation arrangement |  | 40.00% |  |  |  |  |
Performance Based | PSU TSR | Maximum |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Percentage of target number of shares to be earned |  | 200.00% |  |  |  |  |
Performance Based | PSU ROIC |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Restricted stock granted |  | 29,174 |  |  |  |  |
Grant date fair value of restricted stock |  | $ 37.79 |  |  |  |  |
Percentage of incentive compensation arrangement |  | 35.00% |  |  |  |  |

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