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Note 5 - Commitments and Contingencies - Supplemental Balance Sheet Information Related to Leases (Details) - USD ($)
$ in Thousands
Mar. 31, 2023
Dec. 31, 2022
Operating lease right-of-use assets $ 2,355 $ 2,449
Current portion of operating lease liability 355 338
Operating lease liability 2,095 2,189
Total operating lease liabilities 2,450 2,527
Total finance lease liabilities 2,989  
Property, Plant and Equipment [Member]    
Property and equipment, at cost 3,045 3,045
Accumulated depreciation (143) (112)
Property and equipment, net 2,902 2,933
Other Current Liabilities [Member]    
Other current liability (5) 71
Other Noncurrent Liabilities [Member]    
Other long term liabilities 2,994 2,911
Other Liabilities [Member]    
Total finance lease liabilities $ 2,989 $ 2,982