XML 25 R16.htm IDEA: XBRL DOCUMENT v3.8.0.1
Summary of Significant Accounting Policies (Tables)
3 Months Ended
Jan. 31, 2018
Accounting Policies [Abstract]  
Warranty Accrual

Following is a tabular reconciliation of the changes in the warranty accrual for the three-month period ended January 31:

 

    2018   2017
Beginning balance   $ 70,000     $ 65,000  
Warranty service provided     (33,604 )     (28,392 )
New product warranties     32,579       33,186  
Changes to pre-existing warranty accruals     1,025       (4,794 )
Ending balance   $ 70,000     $ 65,000