Note 5 - Income Taxes (Details Textual)	3 Months Ended
Apr. 30, 2022	Apr. 30, 2021
Effective Income Tax Rate Reconciliation, Percent, Total	455.90%	(24.30%)

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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 12
-URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32687-109319

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