XML 51 R40.htm IDEA: XBRL DOCUMENT v3.20.4
Note 11 - Revenue Recognition (Details Textual) - USD ($)
Jan. 31, 2021
Oct. 31, 2020
Contract with Customer, Liability, Total $ 104,225 $ 63,283
Contract with Customer, Refund Liability, Total $ 138,733 $ 119,989