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Note 8 - Stock-based Compensation Expense - Stock Compensation Expense (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Share-Based Payment Arrangement, Expense	$ 373,000
Awards issued and vested (in shares)	120,000
Stock-based compensation expense	$ 373,000
Management Bonus Program [Member]
Awards issued and vested (in shares)	0
Share-Based Payment Arrangement, Option [Member]
Share-Based Payment Arrangement, Expense	$ 17,000	$ 34,000
Stock-based compensation expense	$ 17,000	$ 34,000
Restricted Stock Units (RSUs) [Member]
Awards issued and vested (in shares)	120,000	116,000
Restricted Stock Units (RSUs) [Member] | Board Member [Member]
Share-Based Payment Arrangement, Expense	$ 4,000
Stock-based compensation expense	4,000
Restricted Stock Units (RSUs) [Member] | Chief Executive Officer [Member]
Share-Based Payment Arrangement, Expense	$ 352,000
Awards issued and vested (in shares)	120,000
Stock-based compensation expense	$ 352,000

X

- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 14.F)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479830/718-10-S99-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (h)(1)(i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

+ Details

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X

- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(02)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

+ Details

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