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Note 8 - Commitments and Contingencies - Lease Expense (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Dec. 31, 2023
Operating lease – expense $ 100 $ 100  
Operating lease from discontinued operations – expense 0 30  
Operating lease – included in operating cash flow 76 74  
Operating lease from discontinued operations – included in operating cash flow $ 0 $ 32  
Weighted-average remaining lease term (in years) (Year) 3 years 3 months 18 days   4 years
Weighted-average discount rate 5.00%   5.00%