v3.25.4
Note 3 - Property and Equipment (Details Textual) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Property, Plant and Equipment, Gross $ 415,506 $ 487,791  
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment 133,551 156,742  
Asset Impairment Charges 11,500    
Impairment of Long-Lived Assets to be Disposed of 10,724 17,726 $ 0
Operating Lease, Impairment Loss 700    
Cost of Revenue Property and Equipment Impairment   1,400  
Property, Plant and Equipment, Fully Depreciated Writedown     4,800
Total Consideration, Sold Property and Equipment and Intangibles 20,800    
Proceeds from Sale of Property, Plant, and Equipment and Intangibles 1,000    
Gain (Loss) on Disposition of Assets 5,882 (0) $ (0)
Property, Plant and Eqiuipmet and Intangible Assets [Member]      
Disposal Group Including Discontinued Operation Assets Sold, BookValue 15,000    
Gain (Loss) on Disposition of Assets 5,900    
Fiber Network [Member]      
Property, Plant and Equipment, Gross [1] 272,713 272,959  
Fiber Network [Member] | Greenwood Village Fiber-to-the-premises Grant [Member]      
Property, Plant and Equipment, Gross 100 1,600  
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment 100 100  
Asset under Construction [Member]      
Property, Plant and Equipment, Gross 8,246 25,810  
Impaired Assets to be Disposed of by Method Other than Sale, Carrying Value of Asset 14,900 33,600  
Property, Plant, and Equipment, Salvage Value 4,900 $ 15,900  
Impairment of Long-Lived Assets to be Disposed of 10,000    
Specific Network Assets Damaged [Member]      
Asset Impairment Charges $ 800    
[1] Fiber network is presented net of $0.1 million government grants (2024: $1.6 million), with an impact of $0.1 million on accumulated depreciation (2024: $0.1 million).