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Note 6 - LEASES - Lease Cost (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Note 6 - Leases - Lease Cost (Details)          
Operating lease expense $ 448 $ 455 $ 1,417 $ 1,362  
Short-term lease and variable lease expense (1) 196 127 602 401  
Total lease expense $ 644 $ 582 $ 2,019 1,763  
Weighted average remaining lease term under operating ROU leases (in years) (Year) 6 years   6 years   6 years 4 months 24 days
Weighted average discount rate for operating lease liabilities 5.25%   5.25%   5.24%
Operating lease ROU assets obtained (in thousands)       $ 151