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Note 5 - Commitments and Contingencies - Non-cash Flow Information Related to ROU Asset and Lease Liabilities (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Accretion of the lease liability $ 249 $ 340
Amortization of right-of-use assets $ 293 $ 333
Operating leases (in years) (Year) 4 years 2 months 12 days 5 years 2 months 12 days
Finance leases (in years) (Year) 13 years 14 years
Operating leases 14.10% 14.20%
Finance leases 13.20% 13.20%