| 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 |
|---|
| Cash and cash equivalents | 53 | 18 | 24 | 26 | 27 | 29 | 140 | 87 | 66 | 148 | 160 |
|---|
| Short-term investments | 22 | 25 | 30 | 38 | 55 | 70 | 90 | 126 | 157 | 130 | 147 |
|---|
| Accounts and other receivables | 8 | 8 | 10 | 20 | 32 | 54 | 99 | 165 | 232 | 268 | 274 |
|---|
| Prepaid Expense and Other Assets | 1 | 2 | 2 | 3 | 5 | 6 | 8 | 12 | 14 | 17 | 16 |
|---|
| Total current assets | 85 | 54 | 65 | 87 | 118 | 159 | 337 | 391 | 469 | 562 | 597 |
|---|
| Restricted cash | - | - | 1 | 1 | 1 | 1 | 6 | 13 | 19 | 23 | 39 |
|---|
| Long-term investments | 1 | 2 | 3 | 3 | 4 | 4 | 6 | 7 | 8 | 13 | 0 |
|---|
| Property, Plant and Equipment, Net | 8 | 10 | 8 | 8 | 70 | 70 | 73 | 78 | 91 | 104 | 102 |
|---|
| Intangible assets, net | 5 | 5 | 5 | 5 | 8 | 8 | 27 | 23 | 24 | 19 | 13 |
|---|
| Other long-term assets | - | 0 | 0 | 3 | 7 | 15 | 17 | 18 | 19 | 19 | 18 |
|---|
| Goodwill | - | - | - | - | - | - | 33 | 33 | 42 | 44 | 37 |
|---|
| Total assets | 98 | 71 | 82 | 106 | 208 | 257 | 498 | 563 | 672 | 783 | 807 |
|---|
| Accounts payable | 2 | 1 | 2 | 3 | 3 | 4 | 6 | 9 | 9 | 11 | 12 |
|---|
| Accrued Liabilities, Current | 5 | 4 | 4 | 8 | 11 | 14 | 23 | 28 | 33 | 34 | 33 |
|---|
| Reserve for veterinary invoices | 5 | 6 | 10 | 13 | 16 | 21 | 29 | 40 | 44 | 63 | 52 |
|---|
| Deferred revenue | 9 | 11 | 13 | 23 | 33 | 53 | 93 | 147 | 203 | 235 | 252 |
|---|
| Long-Term Debt, Current Maturities | - | - | - | - | - | - | - | - | 1 | 1 | 1 |
|---|
| Total current liabilities | 23 | 24 | 31 | 46 | 63 | 92 | 150 | 224 | 290 | 344 | 350 |
|---|
| Long-Term Debt | - | - | - | - | - | - | - | - | 68 | 128 | 128 |
|---|
| Deferred tax liabilities | - | - | - | - | - | - | 5 | 3 | 3 | 3 | 2 |
|---|
| Other liabilities | 0 | 1 | 1 | 1 | 1 | 2 | 3 | 4 | 5 | 4 | 4 |
|---|
| Total liabilities | 39 | 26 | 38 | 57 | 78 | 120 | 158 | 230 | 366 | 479 | 484 |
|---|
| Common Stock, Value, Outstanding | - | - | - | - | - | - | - | - | - | - | - |
|---|
| Preferred Stock, Value, Outstanding | - | - | - | - | - | - | - | - | - | - | - |
|---|
| Additional paid-in capital | 119 | 123 | 130 | 135 | 220 | 233 | 439 | 467 | 500 | 536 | 568 |
|---|
| Accumulated other comprehensive income (loss) | 0 | -1 | -0 | -0 | -1 | 0 | 3 | 3 | -6 | 0 | -3 |
|---|
| Accumulated deficit | -57 | -74 | -81 | -83 | -84 | -86 | -91 | -127 | -172 | -216 | -226 |
|---|
| Treasury stock, at cost | 3 | 3 | 3 | 3 | 6 | 11 | 11 | 11 | 17 | 17 | 17 |
|---|
| Total stockholders' equity | 59 | 45 | 45 | 48 | 129 | 137 | 340 | 332 | 305 | 304 | 323 |
|---|
| Total liabilities and stockholders’ equity | 98 | 71 | 82 | 106 | 208 | 257 | 498 | 563 | 672 | 783 | 807 |
|---|
| Common Stock, Par or Stated Value Per Share | - | - | - | - | - | - | - | - | 0 | 0 | 0 |
|---|
| Preferred Stock, Par or Stated Value Per Share | - | - | - | - | - | - | - | - | 0 | 0 | 0 |
|---|