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Note 12 - Stock-Based Compensation (Details Textual) - USD ($) $ / shares in Units, shares in Millions, $ in Millions			12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	$ 4.7		$ 4.7
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)			1 year 7 months 6 days
Vesting Rate of the Targeted Shareholder Return			100.00%
Minimum Vesting Rate of the Targeted Shareholder Return, Percentage			0.00%
Maximum Vesting Rate of the Targeted Shareholder Return, Percentage			150.00%
Share Price (in dollars per share)	$ 5.35		$ 5.35
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period, Intrinsic Value			$ 0.6	$ 0.1
Share-Based Compensation Arrangement by Share-Based Payment Award, Discount from Market Price, Offering Date			15.00%
Stock Issued During Period, Shares, Employee Stock Purchase Plans (in shares)	0.1	0.2
2021 Incentive Plan [Member]
Employee Stock Ownership Plan, Shares Available for Issuance (in shares)	3.1		3.1
Employee Stock Purchase Plan [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares)	0.3		0.3

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- Definition

Number of shares available for issuance under an employee stock ownership plan.

+ References

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- Definition

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- Definition

Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (i)
-Publisher FASB
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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

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- Definition

Discount rate from fair value on offering date that participants pay for shares.

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- Definition

The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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- Definition

Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

+ References

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Price of a single share of a number of saleable stocks of a company.

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Number of shares issued during the period as a result of an employee stock purchase plan.

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