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Note 12 - Leases - Components of Lease Expense and Other Lease Information (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Dec. 31, 2022
Operating Lease - Operating Cash Flows (Fixed Payments) $ 1,464 $ 938 $ 2,858 $ 1,874  
Operating Lease - Operating Cash Flows (Liability Reduction) 1,263 833 2,495 1,665  
New ROU Assets - Operating Leases $ 296 2,167 $ 3,117 3,545  
Weighted Average Discount Rate 4.88%   4.88%   3.09%
Weighted Average Remaining Lease Term (Year) 6 years 2 months 12 days   6 years 2 months 12 days   7 years 8 months 26 days
Fiber Internet Services [Member] | Operating Segments [Member]          
Operating Lease Cost (leases with a total term greater than 12 months) $ 1,347        
Short-term Lease Cost (leases with a total term of 12 months or less) 49        
Variable Lease Cost 449        
Total Lease Cost $ 1,845        
Mobile Services [Member] | Operating Segments [Member]          
Operating Lease Cost (leases with a total term greater than 12 months)   967 $ 2,638 1,815  
Short-term Lease Cost (leases with a total term of 12 months or less)   36 146 47  
Variable Lease Cost   154 916 257  
Total Lease Cost   $ 1,157 $ 3,700 $ 2,119