Note 8 - Long-term Debt - Future Maturities of Long-term Debt (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
2023	$ 77
2024	81
2025	87
2026	92
2027	89
Total long-term debt	$ 426	$ 1,766

Amount, excluding unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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