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Note 4 - Leases - Lease Cost (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Dec. 31, 2022
Right-of-use assets $ 733   $ 733   $ 868
Current lease obligation 179   179   189
Long-term lease obligation 658   658   794
Total lease liabilities 837   837   $ 983
Operating lease cost 49 $ 77 162 $ 177  
Short-term lease cost 312 2 731 6  
Sublease income 0 (21) 0 (54)  
Total lease costs $ 361 $ 58 $ 893 $ 129  
Weighted average lease term (years) (Year) 4 years 2 months 12 days 5 years 4 years 2 months 12 days 5 years  
Weighted average discount rate 4.25% 4.47% 4.25% 4.47%