Note 9 - Impact of Tax Reform Act (Details Textual) - USD ($)	3 Months Ended	12 Months Ended
	Jan. 31, 2018	Oct. 31, 2019	Oct. 31, 2018
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability	$ (1,400,000)
Income Tax Expense (Benefit) Continuing Operations Change in Tax Rate	$ (1,400,000)
Scenario, Forecast [Member]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent		21.00%	23.00%