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Note 5 - Commitments and Contingencies - Supplemental Balance Sheet Information Related to Leases (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Operating lease right-of-use assets $ 2,449 $ 2,462
Current portion of operating lease liability 338 260
Operating lease liability 2,189 2,318
Total operating lease liability 2,527 2,578
Total finance lease liability 2,982  
Property, Plant and Equipment [Member]    
Property and equipment, at cost 3,045 2,317
Accumulated depreciation (112) (376)
Property and equipment, net 2,933 1,941
Other Current Liabilities [Member]    
Other current liability 71 550
Other Noncurrent Liabilities [Member]    
Other long term liabilities 2,911 720
Other Liabilities [Member]    
Total finance lease liability $ 2,982 $ 1,270