Note 11 - Related Party Transactions (Details Textual) - Son of Executive Chairman [Member] - USD ($)	1 Months Ended	12 Months Ended
Apr. 30, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Salary and Wage, Excluding Cost of Good and Service Sold, Total		$ 375,000	$ 360,000
Cash Bonus		0	309,000
Other Labor-related Expenses		$ 33,000	$ 43,000
Change in Excess of Bonus or Salary				$ 50,000
Stock Appreciation Rights (SARs) [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)	235,876
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grant Date Fair Value, Amount	$ 840,000

It represents the value of cash bonus.

No definition available.

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Balance Type:	debit
Period Type:	duration

- Definition

Represents the value of change in excess of bonus or salary.

+ References

No definition available.

+ Details

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- Definition

Represents the grant date fair value of equity instruments other than options awarded during the period.

+ References

No definition available.

+ Details

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- Definition

Amount of labor-related expenses classified as other.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.4)
-URI https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227

+ Details

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- Definition

Amount of expense for salary and wage arising from service rendered by nonofficer and officer employees. Excludes allocated cost, labor-related nonsalary expense, and direct and overhead labor cost included in cost of good and service sold.

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(01)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

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- Details

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