COGENT COMMUNICATIONS HOLDINGS, INC.CCOI
| Dec 31, 2011 | Dec 31, 2012 | Dec 31, 2013 | Dec 31, 2014 | Dec 31, 2015 | Dec 31, 2016 | Dec 31, 2017 | Dec 31, 2018 | Dec 31, 2019 | Dec 31, 2020 | Dec 31, 2021 | Dec 31, 2022 | Dec 31, 2023 | Dec 31, 2024 |
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| Cash and cash equivalents | 238 | 247 | 305 | 288 | 204 | 274 | 247 | 276 | 399 | 371 | 320 | 224 | 75 | 198 |
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| Restricted cash | - | - | - | - | - | - | - | - | - | - | - | - | - | 7 |
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| Accounts Receivable, after Allowance for Credit Loss, Current | 25 | 24 | 31 | 33 | 31 | 34 | 39 | 42 | 40 | 44 | 42 | 44 | 135 | 97 |
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| Business Combination, Amount Due From Seller, Under IP Transit Services Agreement, Net Of Discount, Current | - | - | - | - | - | - | - | - | - | - | - | - | 179 | 83 |
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| Due from T-Mobile, Transition Services Agreement | - | - | - | - | - | - | - | - | - | - | - | - | 5 | 0 |
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| Prepaid expenses and other current assets | 10 | 10 | 19 | 19 | 17 | 20 | 20 | 33 | 36 | 41 | 39 | 46 | 81 | 74 |
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| Total current assets | 273 | 281 | 354 | 340 | 251 | 328 | 306 | 350 | 476 | 456 | 410 | 366 | 514 | 482 |
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| Property and equipment | 836 | 889 | 985 | 1,048 | 1,070 | 1,136 | 1,234 | 1,301 | 1,367 | 1,516 | 1,620 | 1,715 | 2,947 | 3,320 |
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| Accumulated depreciation and amortization | 528 | 578 | 644 | 687 | 710 | 775 | 852 | 925 | 998 | 1,086 | 1,162 | 1,170 | 1,410 | 1,656 |
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| Total property and equipment, net | 308 | 311 | 341 | 361 | 360 | 362 | 381 | 375 | 369 | 430 | 458 | 544 | 1,538 | 1,664 |
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| Lease, Right-of-Use Asset | - | - | - | - | - | - | - | - | 73 | 100 | 102 | 82 | 362 | 324 |
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| IPv4 intangible assets | - | - | - | - | - | - | - | - | - | - | - | - | - | 458 |
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| Other intangible assets, net | - | - | - | - | - | - | - | - | - | - | - | - | - | 13 |
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| Due from T-Mobile, IP Transit Services Agreement, net of discount of $12,132 and $27,916, respectively | - | - | - | - | - | - | - | - | - | - | - | - | 264 | 180 |
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| Due from T-Mobile, Purchase Agreement, net of discount of $5,755 and $13,725, respectively | - | - | - | - | - | - | - | - | - | - | - | - | 39 | 22 |
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| Deposits and other assets | - | - | - | - | - | - | - | 11 | 14 | 14 | 15 | 18 | 23 | 30 |
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| Total assets | 598 | 607 | 755 | 762 | 663 | 738 | 711 | 740 | 932 | 1,000 | 985 | 1,010 | 3,212 | 3,173 |
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| Accounts payable | 14 | 15 | 14 | 13 | 12 | 12 | 12 | 9 | 11 | 10 | 12 | 27 | 48 | 40 |
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| Accrued Liabilities, Current | 22 | 27 | 31 | 32 | 38 | 47 | 48 | 51 | 51 | 51 | 39 | 64 | 121 | 135 |
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| Due to T-Mobile - Transition Services Agreement | - | - | - | - | - | - | - | - | - | - | - | - | 67 | 1 |
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| Due to T-Mobile - Purchase Agreement | - | - | - | - | - | - | - | - | - | - | - | - | 5 | - |
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| Operating Lease, Liability, Current | - | - | - | - | - | - | - | - | 10 | 11 | 12 | 12 | 68 | 57 |
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| Finance Lease, Liability, Current | - | - | - | - | - | - | - | - | 8 | 16 | 17 | 17 | 65 | 21 |
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| Total current liabilities | 48 | 52 | 144 | 60 | 69 | 68 | 75 | 75 | 90 | 94 | 81 | 120 | 373 | 253 |
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| Senior secured 2026 Notes | - | - | - | - | - | - | - | - | - | - | - | 498 | 498 | 499 |
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| Secured IPv4 notes | - | - | - | - | - | - | - | - | - | - | - | - | - | 199 |
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| Secured notes | - | - | - | - | - | 373 | 374 | 444 | - | - | - | - | - | - |
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| Senior unsecured 2027 Notes | - | - | - | - | - | - | - | - | - | - | - | - | 447 | 741 |
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| Unsecured Long-term Debt, Noncurrent | - | - | - | 200 | 197 | 187 | 187 | 188 | - | - | - | - | - | - |
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| Operating Lease, Liability, Noncurrent | - | - | - | - | - | - | - | - | 87 | 111 | 112 | 95 | 330 | 302 |
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| Finance Lease, Liability, Noncurrent | - | - | - | - | - | - | - | - | 162 | 203 | 229 | 287 | 420 | 517 |
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| Deferred income tax liabilities | - | - | - | - | - | - | - | - | - | - | - | - | 471 | 398 |
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| Other long-term liabilities | 11 | 10 | 20 | 22 | 31 | 28 | 28 | 25 | 15 | 15 | 45 | 83 | 62 | 40 |
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| Total liabilities | 434 | 447 | 562 | 678 | 675 | 791 | 813 | 889 | 1,136 | 1,294 | 1,358 | 1,529 | 2,602 | 2,950 |
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| Common Stock, Value, Issued | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
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| Additional paid-in capital | 489 | 497 | 508 | 461 | 434 | 443 | 457 | 471 | 493 | 516 | 548 | 575 | 607 | 630 |
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| Accumulated other comprehensive loss | - | - | - | - | - | - | - | - | -12 | -1 | -11 | -19 | -14 | -31 |
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| Accumulated (deficit) earnings | -324 | -338 | -317 | -370 | -432 | -479 | -555 | -609 | -685 | -808 | -910 | -1,075 | 17 | -376 |
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| Total stockholders' equity | 164 | 160 | 193 | 84 | -12 | -53 | -103 | -149 | -204 | -293 | -373 | -519 | 610 | 223 |
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| Total liabilities and stockholders' equity | 598 | 607 | 755 | 762 | 663 | 738 | 711 | 740 | 932 | 1,000 | 985 | 1,010 | 3,212 | 3,173 |
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