| Dec 31, 2011 | Dec 31, 2012 | Dec 31, 2013 | Dec 31, 2014 | 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 loss | -16 | -12 | -2 | -10 | -281 | -159 | -339 | -48 | -50 | -67 | -79 | -60 |
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| Impairment of goodwill | - | - | - | - | - | - | 224 | - | - | 46 | 78 | 63 |
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| Depreciation | 13 | 14 | 17 | 18 | 23 | 17 | 13 | 14 | 16 | 17 | 20 | 22 |
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| Non-cash operating lease expense | - | - | - | - | - | - | - | 6 | 5 | 6 | 5 | 5 |
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| Amortization expense of finance leases | - | - | - | - | - | - | 2 | 2 | 2 | 2 | 2 | 4 |
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| Stock-based compensation expense | 21 | 25 | 27 | 42 | 17 | 38 | 17 | 10 | 14 | 8 | 5 | 3 |
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| Amortization of intangible assets | 9 | 9 | 8 | 7 | 35 | 33 | 30 | 27 | 25 | 27 | 5 | 3 |
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| Impairment of right-of-use and long-lived assets | - | - | - | - | - | - | - | - | - | - | 2 | 1 |
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| Fair Value Adjustment of Warrants | - | - | - | - | - | - | 2 | -5 | 8 | -10 | -0 | -1 |
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| Deferred tax provision | -4 | 1 | 2 | -13 | -3 | 2 | -4 | 0 | -2 | -0 | -0 | -1 |
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| Other | - | - | - | - | - | -1 | 0 | -0 | -1 | -1 | -2 | -2 |
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| Accounts receivable | 10 | 5 | 23 | 17 | -15 | -5 | -3 | -2 | 2 | -3 | -5 | 2 |
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| Prepaid expenses and other assets | 2 | -1 | 1 | 3 | 33 | 4 | -2 | 6 | 1 | 1 | -2 | -2 |
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| Accounts payable, accrued expenses, and other liabilities | - | - | - | - | 85 | -5 | 10 | -17 | -4 | 7 | -4 | -11 |
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| Contract liability and customer advances | - | - | - | - | - | - | - | - | -11 | -2 | -6 | -5 |
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| Operating lease liabilities | - | - | - | - | - | - | -8 | -6 | -6 | -7 | -8 | -9 |
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| Net cash provided by operating activities | 27 | 45 | 45 | 49 | -56 | -73 | -5 | 1 | 10 | 35 | 29 | 18 |
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| Capitalized internal-use software costs | - | - | - | - | - | 10 | 12 | 15 | 15 | 17 | 22 | 23 |
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| Purchases of property and equipment | 7 | 8 | 5 | 8 | 10 | 4 | 3 | 0 | 1 | 1 | 2 | 1 |
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| Net cash used in investing activities | -10 | -8 | -4 | -12 | 18 | -14 | -10 | -16 | -15 | -18 | -24 | -24 |
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| Proceeds from secured term loan | - | - | - | - | - | - | - | - | - | - | - | 45 |
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| Proceeds from insurance financing | - | - | - | - | - | - | - | - | - | - | - | 2 |
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| Payments for dividends on convertible redeemable preferred stock | - | - | - | - | - | - | - | - | 5 | 16 | - | - |
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| Principal payments on insurance financing | - | - | - | - | - | - | - | - | - | - | - | 2 |
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| Principal payments on finance leases | - | - | - | - | - | - | 3 | 2 | 2 | 3 | 2 | 3 |
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| Contingent consideration payment at initial value | - | - | - | - | - | - | - | - | - | - | 1 | 4 |
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| Payments of debt issuance costs | 0 | - | 0 | - | - | 5 | - | - | - | - | - | 5 |
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| Payments of line of credit | - | 4 | 4 | - | - | - | - | - | - | - | - | 16 |
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| Other | - | - | - | - | - | - | - | - | -1 | -0 | -0 | -0 |
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| Net cash provided by (used in) financing activities | -12 | -14 | -33 | -59 | -8 | 93 | 32 | -2 | -22 | -18 | -3 | 18 |
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| Effect of exchange rate changes on cash, cash equivalents and restricted cash | - | - | - | - | - | -2 | -0 | 1 | -1 | -1 | 1 | -1 |
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| Net increase (decrease) in cash, cash equivalents and restricted cash | - | - | - | - | -43 | 5 | 17 | -16 | -28 | -2 | 2 | 11 |
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| Interest paid | - | - | - | - | - | 8 | 4 | 24 | 1 | 1 | 2 | 1 |
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| Income Taxes Paid, Net | 2 | 1 | 1 | 2 | 0 | 1 | 1 | 1 | 2 | 2 | 2 | 1 |
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| Operating Lease, Payments | - | - | - | - | - | - | - | - | 10 | 10 | 11 | 11 |
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| Operating cash flows from finance leases | - | - | - | - | - | - | - | - | 0 | 0 | 0 | 1 |
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| Issuance of Convertible Redeemable Preferred Stock, Value | - | - | - | - | - | - | - | - | - | - | - | 33 |
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| Temporary Equity Dividends Adjustment Noncash | - | - | - | - | - | - | - | - | 8 | 8 | 16 | 9 |
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| Right-of-Use Asset Obtained in Exchange for Finance Lease Liability | - | - | - | - | - | - | - | - | 3 | 1 | 3 | 8 |
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| Settlement of restricted stock unit liability | - | - | - | - | - | - | - | - | 7 | 2 | 3 | 2 |
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| Modification of operating right-of-use assets | - | - | - | - | - | - | - | - | - | - | - | 1 |
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| Capital Expenditures Incurred but Not yet Paid | - | 1 | 1 | 2 | 0 | 1 | 0 | 0 | - | 1 | 1 | 1 |
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| Accrued debt issuance costs | - | - | - | - | - | - | - | - | - | - | - | 1 |
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| Right-of-Use Asset Obtained in Exchange for Operating Lease Liability | - | - | - | - | - | - | - | - | 5 | 1 | 1 | - |
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