| 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 |
|---|
| Subscription, maintenance and support | - | - | - | - | - | - | - | - | - | 215 | 213 | 233 | 254 |
|---|
| Subscription and Circulation | - | - | - | - | - | - | - | - | 141 | 170 | 178 | 204 | 234 |
|---|
| Maintenance | - | - | - | - | - | - | - | - | 58 | 45 | 35 | 29 | 20 |
|---|
| Service | - | - | - | - | - | - | - | - | 47 | 37 | 38 | 44 | 50 |
|---|
| Revenue from Contract with Customer, Including Assessed Tax | - | - | - | - | - | - | - | - | - | 252 | 251 | 276 | 304 |
|---|
| Subscription, maintenance and support | - | - | - | - | - | - | - | - | - | 62 | 62 | 63 | 65 |
|---|
| Subscription and Circulation | - | - | - | - | - | - | - | - | 42 | 52 | 53 | 55 | 57 |
|---|
| Maintenance | - | - | - | - | - | - | - | - | 11 | 10 | 9 | 8 | 8 |
|---|
| Service | - | - | - | - | - | - | - | - | 46 | 43 | 43 | 47 | 50 |
|---|
| Cost of Goods and Services Sold | - | - | - | - | - | - | - | - | 99 | 105 | 105 | 110 | 115 |
|---|
| Gross profit | 70 | 84 | 102 | 128 | 107 | 90 | 100 | 120 | 151 | 148 | 146 | 166 | 188 |
|---|
| Selling and Marketing Expense | - | - | - | 62 | 74 | 64 | 68 | 72 | 90 | 87 | 86 | 95 | 92 |
|---|
| Research and development | 26 | 28 | 32 | 43 | 47 | 53 | 56 | 56 | 67 | 76 | 82 | 93 | 89 |
|---|
| General and Administrative Expense | - | - | - | 38 | 39 | 39 | 40 | 41 | 47 | 51 | 50 | 54 | 57 |
|---|
| Business Combination, Acquisition Related Costs | - | - | 2 | 3 | - | - | 1 | 0 | 1 | - | 2 | - | - |
|---|
| Tangible Asset Impairment Charges | - | - | - | 4 | 3 | - | - | - | - | - | - | 2 | - |
|---|
| Income from operations | 9 | 8 | 4 | -22 | -55 | -65 | -65 | -49 | -53 | -66 | -74 | -78 | -51 |
|---|
| Convertible debt interest and amortization | - | - | - | - | 9 | 9 | 13 | 17 | 15 | 11 | 6 | 6 | 6 |
|---|
| Other Nonoperating Income (Expense) | - | -0 | -0 | -3 | -1 | -0 | 0 | 2 | -0 | 1 | 0 | 3 | -0 |
|---|
| Nonoperating Income (Expense) | - | - | - | - | - | - | - | - | - | - | - | - | 1 |
|---|
| Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest, Total | 9 | 8 | 3 | -25 | -65 | -75 | -78 | -64 | -68 | -76 | -80 | -81 | -55 |
|---|
| Income Tax Expense (Benefit) | 2 | 3 | -0 | 12 | 1 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 |
|---|
| Net Income (Loss) Attributable to Parent | 6 | 5 | 3 | -37 | -66 | -75 | -78 | -64 | -69 | -77 | -81 | -82 | -56 |
|---|
| Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax | - | - | - | -2 | -2 | -1 | 2 | -1 | -1 | 0 | -1 | -1 | 0 |
|---|
| Other Comprehensive Income (Loss), Net of Tax | - | - | - | -2 | -2 | -1 | 2 | -1 | -1 | 0 | -1 | -1 | 0 |
|---|
| Comprehensive income (loss) | - | 5 | 3 | -39 | -68 | -76 | -76 | -65 | -70 | -77 | -82 | -83 | -56 |
|---|
| Income (Loss) from Continuing Operations, Per Outstanding Share, Basic and Diluted, Net of Tax | - | - | - | - | - | - | - | - | - | - | - | -1.82 | -1.22 |
|---|