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Summary of Significant Accounting Policies (Tables)
3 Months Ended
Jan. 31, 2020
Accounting Policies [Abstract]  
Warranty Accrual

    2020   2019
Beginning balance   $ 60,000     $ 80,000  
Warranty service provided     (22,606 )     (39,946 )
New product warranties     14,430       16,592  
Changes to pre-existing warranty accruals     8,176       13,354  
Ending balance   $ 60,000     $ 70,000