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Note 18 - Commitments and Contingencies (Details Textual) - USD ($)
12 Months Ended 312 Months Ended
Jan. 07, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2016
Dec. 31, 2047
Feb. 09, 2015
Contractual Obligation, Term (Year)   10 years        
Purchase Commitment, Remaining Minimum Amount Committed   $ 45,200,000        
Long-term Debt, Total   191,400,000        
Lease, Cost, Total   3,720,000 $ 3,285,000      
Ting Fiber Inc. [Member] | Forecast [Member]            
Lease, Cost, Total         $ 593,000,000  
Ting Fiber Inc. [Member] | Subsequent Event [Member]            
Debt Instrument, Term (Year) 25 years          
City of Westminster, Maryland [Member] | Loan to Finance WFN Construction [Member]            
Line of Credit Facility, Maximum Borrowing Capacity       $ 21,000,000.0    
Debt Instrument, Term of Interest Only Payments (Year)       5 years    
Debt Instrument, Term (Year)       30 years    
Long-term Debt, Total   $ 16,200,000        
Guarantee Obligations [Member] | Lease and Network Operations Agreement [Member] | Ting Fiber Inc. [Member]            
Loss Contingency, Debt Service Guarantee, Revenue Shortfall Difference, Lower Threshold           $ 50,000
Loss Contingency, Debt Service Guarantee, Revenue Shortfall Difference, Upper Threshold           $ 150,000