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Note 1 - Summary of Significant Accounting Policies - Estimated Future Annual Amortization Expense (Details) - USD ($)
$ in Thousands
Mar. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Total $ 382 $ 422 $ 501
Finite-lived Intangible Assets, Excluding Projects in Process [Member]      
Remainder of 2023 119    
2024 87    
2025 14    
2026 14    
Thereafter 37    
Total $ 271