Note 4 - Leases - Components of Lease Expense (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Operating lease expense	$ 281	$ 293	$ 565	$ 598
Financing lease expense	8	8	16	16
Short Term lease expense	3	17	6	21
Total lease expense	$ 292	$ 318	$ 587	$ 635
Weighted Average Remaining Lease Term (Years) - operating leases (Year)	5 years 7 months 24 days	6 years 8 months 1 day	5 years 7 months 24 days	6 years 8 months 1 day
Weighted Average Remaining Lease Term (Years) - financing leases (Year)	3 months 29 days	1 year 3 months 29 days	3 months 29 days	1 year 3 months 29 days
Weighted Average Discount Rate - operating leases	3.20%	3.22%	3.20%	3.22%
Weighted Average Discount Rate - financing leases	5.00%	5.00%	5.00%	5.00%
Operating cash flows from operating leases			$ 311	$ 622
Operating cash flows from financing lease			1	2
Financing cash flows from financing lease			$ 10	$ 9

Amount of interest expense on finance lease liability.

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Amount of interest paid on finance lease liability.

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Amount of cash outflow for principal payment on finance lease.

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

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

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Amount of lease cost recognized by lessee for lease contract.

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Amount of operating lease expense. Excludes sublease income.

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Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use.

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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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