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Note 1 - Summary of Significant Accounting Policies - Estimated Future Annual Amortization Expense (Details) - USD ($)
$ in Thousands
Sep. 30, 2022
Dec. 31, 2021
[1]
Dec. 31, 2020
2025 $ 14    
Thereafter 49    
Total 433 $ 501 $ 1,173
Finite-lived Intangible Assets, Excluding Projects in Process [Member]      
Remainder of 2022 40    
2023 159    
2024 86    
Total $ 348    
[1] The condensed consolidated balance sheet at December 31, 2021 has been derived from the audited financial statements at that date