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Note 12 - Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) | Oct. 31, 2020 | Oct. 31, 2019
--- | --- | ---
Accounts receivable, due to allowances for doubtful accounts and sales returns | $ 139,809 | $ 54,370
Inventories, due to allowance for damaged and slow-moving inventories and additional costs inventoried for tax purposes pursuant to the Tax Reform Act of 1986 | 764,183 | 769,871
Liabilities recorded for accrued expenses, deductible for tax purposes when paid | 294,857 | 111,677
Share-based compensation expense | 16,814 | 20,410
Section 163(j) interest | 254,520 | 121,583
Expenses incurred related to expected PPP Loan forgiveness | 1,162,161 | 0
Net operating loss carryforwards | 2,163,956 | 2,374,774
AMT credit carryforwards | 25,003 | 50,007
Other | 53,136 | 53,997
Total gross deferred tax assets | 4,874,439 | 3,556,689
Valuation allowance | (4,759,862) | (3,348,645)
Net deferred tax assets | 114,577 | 208,044
Plant and equipment, due to differences in depreciation and capital gain recognition | (86,997) | (155,461)
Other receivables, due to accrual for financial reporting purposes | (2,577) | (2,576)
Total gross deferred tax liabilities | (89,574) | (158,037)
Net deferred tax asset | $ 25,003 | $ 50,007

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