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Note 12 - Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) | Oct. 31, 2016 | Oct. 31, 2015
--- | --- | ---
Deferred tax assets: |  |
Accounts receivable, due to allowances for doubtful accounts and sales returns | $ 87,472 | $ 53,316
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 | 999,468 | 1,118,735
Liabilities recorded for accrued expenses, deductible for tax purposes when paid | 67,758 | 65,213
Share-based compensation expense | 134,653 | 131,487
Investment in Centric Solutions | 6,984 | 114,118
Net operating loss carryforwards | 1,958,734 | 1,437,611
Other | 110,773 | 57,413
Total gross deferred tax assets | 3,365,842 | 2,977,893
Valuation allowance | (3,060,246) | (2,415,256)
Net deferred tax assets | 305,596 | 562,637
Deferred tax liabilities: |  |
Plant and equipment, due to differences in depreciation and capital gain recognition | (301,590) | (558,222)
Other receivables, due to accrual for financial reporting purposes | (4,006) | (4,415)
Total gross deferred tax liabilities | (305,596) | (562,637)
Net deferred tax asset |  |

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