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COMMITMENTS AND CONTINGENCIES (Details) - USD ($)
$ in Thousands
6 Months Ended
Apr. 30, 2021
Apr. 30, 2020
Schedule of Product Warranties [Line Items]    
Balances as of beginning of fiscal year $ 3,015 $ 2,810
Accruals for warranties 1,027 1,194
Acquired warranty liabilities 0 50
Warranty claims settled (781) (952)
Balances as of end of period $ 3,261 $ 3,102