Note 2 - Sale of a Subsidiary and Discontinued Operations (Details Textual) - USD ($)		12 Months Ended
Aug. 21, 2023	Jan. 31, 2024	Dec. 31, 2023	Jan. 31, 2023
Gain (Loss) on Disposition of Business		$ 2,343,000		$ 0
Disposal Group, Including Discontinued Operation, Foreign Currency Translation Gains (Losses)			$ 1,600,000
Gain (Loss) on Disposition of Property Plant Equipment		0	$ 939,000	939,000
Klein Marine Services, Inc. [Member]
Disposal Group, Including Discontinued Operation, Consideration	$ 10,800,000
Gain (Loss) on Disposition of Business	$ 2,400,000	$ 2,343,000		$ (0)

Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation.

No definition available.

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- Definition

Amount of foreign currency translation gain (loss) in the disposal group, including discontinued operation, recognized in the statement of income as a result of the sale or complete or substantially complete liquidation of an investment in a foreign entity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 830
-SubTopic 30
-Section 45
-Paragraph 20
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481694/830-30-45-20

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- Definition

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.

+ References

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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- Definition

Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property.

+ References

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

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