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Note 9 - 2020 Cash Incentive Bonus Plan (Details Textual) - Cash Incentive Bonus Plan [Member] $ in Thousands			6 Months Ended	12 Months Ended
	Mar. 06, 2025 USD ($)	Feb. 13, 2025 USD ($)	Jun. 30, 2025 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021	Mar. 31, 2021 USD ($)	Oct. 31, 2020 USD ($)
Performance Plan, Valuation Milestone Amount								$ 74,300
Performance Plan, Minimum Number of Days Valuation Milestone Must be Achieved and Maintained (Day)	20 days
Cash Incentive Bonus Award									$ 6,500
Cash Bonus Incentive, Incremental Amounts		11					11
Valuation Milestones Achieved			$ 0	$ 0	$ 0	$ 0
Payments for Cash Incentive Bonus		$ 0	$ 0
Maximum [Member]
Performance Plan, Valuation Milestone Amount	$ 5,000,000
Performance Plan, Merger Consideration Milestone	8,000,000
Minimum [Member]
Performance Plan, Valuation Milestone Amount	$ 200,000