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Warranty Obligations (Detail) - USD ($)
$ in Thousands
3 Months Ended
Jan. 31, 2020
Jan. 31, 2020
Commitments and Contingencies Disclosure [Abstract]    
Standard Product Warranty Accrual, Increase (Decrease) for Preexisting Warranties $ 0  
Movement in Standard Product Warranty Accrual [Roll Forward]    
Accrued warranty at beginning of period 260  
Warranty costs paid (20)  
Accrued warranty at end of period 240  
Total accrued warranty $ 240 $ 240
Less: Current portion of accrued warranty   136
Long-term portion of accrued warranty   $ 104