| 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 | 124 | 141 | 107 | 51 | 63 | 62 | 40 | 13 | 23 | 44 | 82 | 144 | 116 | 39 |
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| Short-term marketable securities | - | - | - | - | - | - | - | - | - | 50 | 41 | - | 6 | 43 |
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| Accounts receivable | 8 | 4 | 5 | 8 | 10 | 9 | 10 | 4 | 2 | 2 | 6 | 3 | 4 | 17 |
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| Contract assets – commissions receivable – current | - | - | - | - | - | - | - | - | - | 219 | 255 | 243 | 245 | 242 |
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| Prepaid expenses and other current assets | - | 7 | 8 | 6 | 5 | 5 | 5 | 5 | 8 | 17 | 24 | 11 | 12 | 13 |
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| Total current assets | 140 | 156 | 124 | 66 | 78 | 76 | 55 | 156 | 208 | 331 | 408 | 401 | 382 | 354 |
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| Contract assets – commissions receivable – non-current | - | - | - | - | - | - | - | - | - | 573 | 653 | 642 | 674 | 758 |
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| Property and equipment, net | 5 | 6 | 10 | 10 | 7 | 6 | 5 | 8 | 11 | 15 | 12 | 6 | 5 | 4 |
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| Operating lease right-of-use assets | - | - | - | - | - | - | - | - | 37 | 43 | 37 | 27 | 23 | 12 |
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| Restricted cash | - | - | - | - | - | - | - | - | 3 | 3 | 3 | 3 | 3 | 3 |
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| Other assets | 6 | 8 | 6 | 6 | 5 | 4 | 7 | 11 | 18 | 26 | 34 | 35 | 27 | 24 |
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| Total assets | 178 | 196 | 166 | 107 | 113 | 109 | 89 | 439 | 742 | 1,040 | 1,149 | 1,113 | 1,113 | 1,155 |
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| Accounts payable | 2 | 6 | 4 | 6 | 3 | 5 | 3 | 6 | 25 | 37 | 14 | 7 | 7 | 23 |
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| Accrued compensation and benefits | 8 | 8 | 10 | 8 | 14 | 11 | 15 | 21 | 30 | 21 | 16 | 21 | 41 | 44 |
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| Accrued marketing expenses | 6 | 4 | 8 | 9 | 11 | 7 | 4 | 11 | 12 | 18 | 36 | 24 | 20 | 17 |
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| Lease liabilities – current | - | - | - | - | - | - | - | - | 5 | 5 | 6 | 6 | 7 | 8 |
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| Other current liabilities | 2 | 2 | 3 | 3 | 3 | 4 | 3 | 2 | 2 | 4 | 3 | 3 | 3 | 4 |
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| Total current liabilities | 18 | 21 | 27 | 27 | 32 | 28 | 27 | 61 | 113 | 84 | 75 | 61 | 79 | 96 |
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| Long-term debt | - | - | - | - | - | - | - | 5 | - | - | - | 66 | 68 | 68 |
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| Deferred income taxes – non-current | - | - | - | - | - | - | - | 48 | 64 | 72 | 51 | 32 | 30 | 39 |
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| Lease liabilities – non-current | - | - | - | - | - | - | - | - | 34 | 41 | 36 | 34 | 28 | 21 |
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| Other non-current liabilities | - | - | - | - | - | - | - | - | 3 | 4 | 5 | 5 | 5 | 5 |
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| Total liabilities | - | - | - | - | - | - | - | - | - | - | 167 | 198 | 209 | 229 |
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| Commitments and Contingencies | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
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| Temporary Equity, Carrying Amount, Attributable to Parent | - | - | - | - | - | - | - | - | - | - | 233 | 263 | 298 | 338 |
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| Preferred Stock, Value, Issued | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
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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 | 215 | 233 | 252 | 259 | 267 | 273 | 282 | 298 | 455 | 721 | 756 | 777 | 799 | 773 |
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| Treasury stock, at cost: 13,379 and 12,828 shares as of December 31, 2024 and 2023, respectively | - | - | - | - | - | - | - | - | - | - | - | 200 | 200 | 200 |
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| Retained earnings | 22 | 29 | 30 | 14 | 9 | 5 | -21 | 205 | 272 | 316 | 193 | 74 | 7 | 15 |
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| Accumulated other comprehensive loss | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | -0 | -0 | -0 |
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| Total stockholders’ equity | 156 | 171 | 133 | 73 | 76 | 78 | 61 | 303 | 527 | 838 | 750 | 651 | 606 | 588 |
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| Total liabilities, convertible preferred stock and stockholders’ equity | 178 | 196 | 166 | 107 | 113 | 109 | 89 | 439 | 742 | 1,040 | 1,149 | 1,113 | 1,113 | 1,155 |
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