Note 4 - Leases - Lease Cost (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Right-of-use asset	$ 400		$ 400		$ 528
Current lease obligation	206		206		196
Long-term lease obligation	259		259		415
Total lease liabilities	465		465		$ 611
Operating lease cost	49	$ 49	146	$ 146
Short-term lease cost	34	27	94	377
Total lease costs	$ 83	$ 76	$ 240	$ 523
Weighted average lease term (years) (Year)	2 years 2 months 12 days	3 years 2 months 12 days	2 years 2 months 12 days	3 years 2 months 12 days
Weighted average discount rate	4.25%	4.25%	4.25%	4.25%

Amount of lease cost recognized by lessee for lease contract.

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Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability.

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Present value of lessee's discounted obligation for lease payments from operating lease.

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Present value of lessee's discounted obligation for lease payments from operating lease, classified as current.

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Present value of lessee's discounted obligation for lease payments from operating lease, classified as noncurrent.

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- Definition

Amount of lessee's right to use underlying asset under operating lease.

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Weighted average discount rate for operating lease calculated at point in time.

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Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount of short-term lease cost, excluding expense for lease with term of one month or less.

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