XML 29 R18.htm IDEA: XBRL DOCUMENT v3.10.0.1
Summary of Significant Accounting Policies (Tables)
12 Months Ended
Oct. 31, 2018
Accounting Policies [Abstract]  
Warranty Accrual

    2018   2017
Beginning balance   $ 70,000     $ 65,000  
Warranty service provided     (102,359 )     (236,314 )
New product warranties     80,817       235,708  
Changes to pre-existing warranty accruals     31,542       5,606  
Ending balance   $ 80,000     $ 70,000