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Note 11 - Income Taxes - Effective Tax Rate (Details)	12 Months Ended
	Oct. 31, 2024	Oct. 31, 2023	Oct. 31, 2022
Income Taxes
Federal statutory income tax rate	21.00%	21.00%	21.00%
State income taxes, net of federal income tax benefit	6.60%	6.10%	5.00%
Non-deductible compensation	2.30%	1.40%	1.20%
Permanent differences, net	(0.10%)	(0.40%)	(0.40%)
Deferred tax asset valuation allowance	(4.10%)	(6.30%)	4.80%
Tax credits	(2.00%)	(2.20%)	(2.00%)
Other	0.00%	0.00%	(0.10%)
Effective tax rate	23.70%	19.60%	29.50%

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the valuation allowance for deferred tax assets.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other nondeductible expenses.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to tax credits. Including, but not limited to, research credit, foreign tax credit, investment tax credit, and other tax credits.

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