| 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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| Net income (loss) | 7 | 7 | 2 | -16 | -5 | -5 | -25 | 0 | 67 | 45 | -104 | -89 | -28 | 10 |
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| Depreciation | 2 | 2 | 3 | 4 | 4 | 4 | 3 | 3 | 3 | 4 | 5 | 4 | 3 | 2 |
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| Capitalized Computer Software, Amortization | - | - | - | - | - | - | 1 | 2 | 4 | 8 | 13 | 17 | 17 | 14 |
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| Stock-based compensation expense | 7 | 6 | 8 | 6 | 7 | 7 | 10 | 13 | 23 | 25 | 33 | 20 | 23 | 20 |
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| Deferred income taxes | 6 | 1 | -1 | 9 | 0 | 0 | -0 | 3 | 16 | 9 | -22 | -18 | -3 | 9 |
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| Impairment charges | - | - | - | - | - | - | - | - | - | - | 46 | 12 | - | 8 |
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| Other non-cash items | - | - | - | - | - | 0 | 0 | -1 | 1 | -1 | -1 | -2 | -1 | -0 |
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| Accounts receivable | -3 | -4 | 0 | 4 | 1 | -0 | 1 | 2 | -1 | -1 | 4 | -3 | 1 | 13 |
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| Contract assets – commissions receivable | - | - | - | - | - | - | - | -51 | -243 | -205 | -116 | 24 | -34 | -82 |
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| Prepaid expenses and other assets | -3 | 1 | 2 | 1 | -1 | 0 | 2 | -0 | 0 | 6 | 8 | -13 | 2 | 4 |
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| Accounts payable | -2 | 4 | -2 | 2 | -3 | 2 | -2 | 1 | 20 | 12 | -23 | -7 | 0 | 16 |
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| Accrued compensation and benefits | 0 | 0 | 2 | -2 | 6 | -3 | 5 | 5 | 9 | -9 | -4 | 4 | 20 | 3 |
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| Accrued marketing expenses | 3 | -2 | 4 | 0 | 2 | -4 | -3 | 6 | 1 | 6 | 19 | -13 | -3 | -4 |
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| Deferred revenue | - | - | - | - | - | - | - | 0 | 2 | -2 | 0 | 0 | 1 | 1 |
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| Accrued expenses and other liabilities | - | - | - | - | - | - | - | - | 2 | 3 | 0 | -0 | -1 | 0 |
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| Net cash used in operating activities | 23 | 25 | 21 | 2 | 14 | 4 | -16 | -3 | -71 | -108 | -163 | -27 | -7 | -18 |
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| Capitalized internal-use software and website development costs | - | - | - | - | - | - | - | 6 | 10 | 16 | 17 | 15 | 9 | 11 |
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| Purchases of property and equipment and other assets | 2 | 4 | 7 | 4 | 3 | 4 | 2 | 5 | 7 | 8 | 4 | 0 | 2 | 2 |
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| Purchases of marketable securities | - | - | - | - | - | - | - | - | - | 181 | 103 | 8 | 55 | 97 |
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| Proceeds from redemption and maturities of marketable securities | - | - | - | - | - | - | - | - | - | 131 | 111 | 50 | 49 | 61 |
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| Net cash used in investing activities | -7 | -10 | -7 | -8 | -3 | -4 | -5 | -26 | -17 | -73 | -13 | 26 | -16 | -48 |
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| Payment of debt issuance costs | - | - | - | - | - | - | - | 1 | 1 | - | - | - | - | 1 |
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| Proceeds from Stock Options Exercised | 1 | 8 | 9 | 4 | 2 | 0 | 1 | 3 | 6 | 2 | 9 | 2 | 1 | 0 |
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| Share-Based Payment Arrangement, Cash Used to Settle Award | -1 | -1 | -1 | -4 | -1 | -1 | -2 | -5 | -14 | -20 | -9 | -3 | -3 | -3 |
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| Principal payments in connection with leases | - | - | - | - | - | - | - | - | 0 | 0 | 0 | 0 | 0 | 0 |
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| Payments of preferred stock dividends | - | - | - | - | - | - | - | - | - | - | - | - | 4 | 6 |
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| Net cash used in financing activities | -20 | 2 | -47 | -49 | 1 | -1 | -1 | 2 | 102 | 201 | 213 | 64 | -6 | -10 |
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| Effect of exchange rate changes on cash, cash equivalents and restricted cash | - | - | - | - | - | - | - | -0 | 0 | 0 | 0 | -0 | -0 | -0 |
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| Net decrease in cash, cash equivalents and restricted cash | - | - | - | - | - | - | - | -27 | 14 | 20 | 38 | 62 | -29 | -77 |
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| Cash paid for interest | - | - | - | - | - | - | - | - | 0 | - | - | 5 | 9 | 9 |
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| Cash payments for income taxes, net | 2 | 2 | 0 | 0 | 0 | 1 | 0 | 0 | - | 1 | 0 | - | 0 | 0 |
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