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Note 11 - Share-based Compensation (Details Textual) - USD ($)	3 Months Ended			6 Months Ended		12 Months Ended
	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures in Period (in shares)				0
Share-Based Payment Arrangement, Expense	$ 1,623,000		$ 806,000	$ 2,582,000	$ 1,772,000
Annual Board Service [Member] | Year 2023 [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Net of Forfeitures (in shares)						250,000
Annual Board Service [Member] | Year 2024 [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Net of Forfeitures (in shares)	350,000
Board Committee Service [Member] | Year 2023 [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)						1 year
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Net of Forfeitures (in shares)						78,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period (Year)						10 years
Share Price (in dollars per share)						$ 12.11
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Exercise Price (in dollars per share)						$ 3.88
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term (Year) (Year)						5 years 3 months
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate						28.00%
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate						4.16%
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested, Number of Shares (in shares)				325,709
Board Committee Service [Member] | Year 2024 [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)				1 year
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Net of Forfeitures (in shares)	91,500
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period (Year)				10 years
Share Price (in dollars per share)	$ 22.25			$ 22.25
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Exercise Price (in dollars per share)				$ 8.87
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term (Year) (Year)				5 years 3 months
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate				32.10%
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate				4.40%
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested, Number of Shares (in shares)				110,375
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Nonvested, Number of Shares (in shares)	331,125			331,125
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	$ 2,900,000			$ 2,900,000
Chief Executive Officer [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Net of Forfeitures (in shares)		400,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period (Year)				10 years
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Exercise Price (in dollars per share)				$ 15.75
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term (Year) (Year)				6 years
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate				31.00%
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate				3.82%
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Exercise Price (in dollars per share)	$ 6.02			$ 6.02
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Nonvested, Number of Shares (in shares)	400,000			400,000
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	$ 2			$ 2
Chief Executive Officer [Member] | Share-Based Payment Arrangement, Tranche One [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested, Number of Shares (in shares)				133,334
Chief Executive Officer [Member] | Share-Based Payment Arrangement, Tranche Two [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested, Number of Shares (in shares)				133,333
Chief Executive Officer [Member] | Share-Based Payment Arrangement, Tranche Three [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested, Number of Shares (in shares)				133,333
Chief Executive Officer [Member] | Year 2023 [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Net of Forfeitures (in shares)						400,000
Continued Service of the Chairman of the Board [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period (Year)						10 years
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Exercise Price (in dollars per share)						$ 9.08
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term (Year) (Year)						6 years 1 month 13 days
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate						37.00%
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate						3.49%
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Exercise Price (in dollars per share)						$ 3.94
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Nonvested, Number of Shares (in shares)	266,666			266,666
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	$ 900,000			$ 900,000
Continued Service of the Chairman of the Board [Member] | Share-Based Payment Arrangement, Tranche One [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested, Number of Shares (in shares)						133,334
Continued Service of the Chairman of the Board [Member] | Share-Based Payment Arrangement, Tranche Two [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested, Number of Shares (in shares)						133,333
Continued Service of the Chairman of the Board [Member] | Share-Based Payment Arrangement, Tranche Three [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested, Number of Shares (in shares)						133,333
Restricted Stock [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)				3 years
Share-Based Payment Arrangement, Expense	300,000		400,000	$ 700,000	1,200,000
Share-Based Payment Arrangement, Option [Member]
Share-Based Payment Arrangement, Expense	$ 1,300,000		$ 400,000	$ 1,900,000	$ 600,000

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
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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

+ References

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- Definition

Agreed-upon price for the exchange of the underlying asset relating to the share-based payment award.

+ References

No definition available.

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- Definition

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The risk-free interest rate assumption that is used in valuing an option on its own shares.

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- Definition

The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

+ References

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Net number of share options (or share units) granted during the period.

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- Definition

Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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