Note 2 - Sale of Subsidiary (Details Textual) - USD ($) $ in Thousands		9 Months Ended
Aug. 21, 2023	Oct. 31, 2024	Oct. 31, 2023
Gain (Loss) on Disposition of Business		$ (0)	$ 2,393
Klein Marine Services, Inc. [Member]
Disposal Group, Including Discontinued Operation, Consideration	$ 11,500
Gain (Loss) on Disposition of Business	$ 2,300

Amount of gain (loss) from sale and disposal of integrated set of activities and assets capable of being conducted and managed for purpose of providing return in form of dividend, lower cost, or other economic benefit to investor, owner, member and participant.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-28

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 810
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481203/810-10-50-1B

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