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Note 10 - Stockholders' Equity and Stock-based Compensation (Details Textual) - USD ($) $ in Thousands		1 Months Ended	3 Months Ended		6 Months Ended		41 Months Ended
	Jan. 31, 2025	Jan. 31, 2025	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Jan. 31, 2025	Sep. 30, 2023	Mar. 31, 2023
Share-Based Payment Arrangement, Expense			$ 0	$ 400	$ 400	$ 800
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)					11,287	11,623
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
Former President and Chief Executive Officer [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested, Number of Shares (in shares)							1,600,000
Former President and Chief Executive Officer [Member] | Separation and Consulting Agreement [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Nonvested, Number of Shares (in shares)	147,525	147,525					147,525
Former President and Chief Executive Officer [Member] | Restricted Stock Units (RSUs) [Member] | Separation and Consulting Agreement [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number (in shares)	7,765	7,765					7,765
Former President and Chief Executive Officer [Member] | Share-Based Payment Arrangement, Option [Member]
Share-Based Payment Arrangement, Plan Modification, Incremental Cost	$ 400
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)	6 years
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate		4.00%
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Payments		$ 0
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term (Month)		5 months 15 days
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Weighted Average Volatility Rate		50.00%
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		5,500,000			5,500,000	4,000,000

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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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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.

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The estimated amount of dividends to be paid to holders of the underlying shares (expected dividends) over the option's term. Dividends are taken into account because payment of dividends to shareholders reduces the fair value of the underlying shares, and option holders generally do not receive dividends.

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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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Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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