Note 10 - Stockholders' Equity and Stock-based Compensation (Details Textual) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2024	Mar. 31, 2023
Share-Based Payment Arrangement, Expense	$ 0.4	$ 0.6
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)	0
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in shares)	0	0
Restricted Stock Units (RSUs) [Member]
Stock Issued During Period, Shares, Restricted Stock Award, Gross (in shares)	11,623	13,587
Participant [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Grant Limit (in shares)	2,000,000
Non Employee Board Member [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Grant Limit (in shares)	100,000
Amended And Restated2019 Long Term Incentive Plan [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares)	5,500,000	4,000,000

Number of grant limit under share-based compensation arrangement.

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

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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).

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Number of shares authorized for issuance under share-based payment arrangement.

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Total number of shares issued during the period, including shares forfeited, as a result of Restricted Stock Awards.

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Number of share options (or share units) exercised during the current period.

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