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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Reconciliation of Basic and Diluted Earnings (Loss) Per Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 12 Months Ended
Oct. 31, 2020
Jul. 31, 2020
Apr. 30, 2020
Jan. 31, 2020
Oct. 31, 2019
Jul. 31, 2019
Apr. 30, 2019
Jan. 31, 2019
Oct. 31, 2020
Oct. 31, 2019
Oct. 31, 2018
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES                      
Net income (loss) $ (3,589) $ 2,162 $ (3,927) $ (893) $ 2,098 $ 3,491 $ 5,252 $ 6,654 $ (6,247) $ 17,495 $ 21,490
Undistributed (earnings) loss allocated to participating shares                 66 (147) (132)
Undistributed (earnings) loss allocated to participating shares                 66 (147) (132)
Net income applicable to common shareholders - Basic                 (6,181) 17,348 21,358
Net income applicable to common shareholders - Diluted                 $ (6,181) $ 17,348 $ 21,358
Weighted average shares outstanding - Basic                 6,670 6,759 6,700
Weighted average shares outstanding - Diluted                 6,670 6,815 6,771
Stock options and contingently issuable securities                   56 71
Income per share -Basic $ (0.54) $ 0.32 $ (0.58) $ (0.13) $ 0.31 $ 0.51 $ 0.77 $ 0.98 $ (0.93) $ 2.57 $ 3.19
Income per share - Diluted $ (0.54) $ 0.32 $ (0.58) $ (0.13) $ 0.31 $ 0.51 $ 0.76 $ 0.97 $ (0.93) $ 2.55 $ 3.15