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CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)
Dec. 31, 2025
Dec. 31, 2024
Assets    
Accounts receivable, net of allowance for credit losses $ 4,610,000 $ 9,762,000
Due from T-Mobile, IP Transit Services Agreement, current portion, net of discount 10,401,000 16,915,000
Due from T-Mobile, IP Transit Services Agreement, noncurrent portion discount 2,255,000 12,122,000
Due from T-Mobile, Purchase Agreement, net of discount $ 4,006,000 $ 5,755,000
Liabilities and stockholders' equity    
Common stock, par value (in dollars per share) $ 0.001 $ 0.001
Common stock, shares authorized 75,000,000 75,000,000
Common stock, shares issued 50,062,158 49,034,925
Common stock, shares outstanding 50,062,158 49,034,925
Senior secured 2026 notes    
Liabilities and stockholders' equity    
Unamortized debt costs $ 375,000 $ 499,000
Senior unsecured 2027 notes    
Liabilities and stockholders' equity    
Unamortized debt costs 1,236,000 2,013,000
Unamortized debt discount 4,344,000 7,053,000
Secured IPv4 notes    
Liabilities and stockholders' equity    
Debt costs 8,863,000 6,702
Senior secured 2032 notes    
Liabilities and stockholders' equity    
Unamortized debt costs $ 2,020 $ 2,020