Note 2 - Business Acquisition - Allocation of Estimated Purchase Price of Schroff Technologies International, Inc. (Details) - USD ($)	Jan. 31, 2021	Oct. 31, 2020	Nov. 01, 2019
Goodwill	$ 2,467,000	$ 2,467,000
Schrofftech [Member]
Current assets			$ 1,168,000
Fixed assets			58,000
Intangible assets			3,299,000
Goodwill			1,127,000
Non-interest bearing liabilities			(403,000)
Net assets			$ 5,249,000

Amount of noninterest bearing liabilities assumed at the acquisition date.

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Amount of assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer, acquired at the acquisition date.

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Amount of intangible assets, excluding goodwill, acquired at the acquisition date.

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Amount recognized as of the acquisition date for the identifiable assets acquired in excess of (less than) the aggregate liabilities assumed.

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The amount of property, plant, and equipment recognized as of the acquisition date.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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