| 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 |
|---|
| Net loss | -48 | -65 | -42 | -33 | -28 | -55 | 77 | -38 | -119 | -50 | -31 |
|---|
| Depreciation and amortization | - | 17 | 23 | 22 | 23 | 26 | 20 | 16 | 17 | 18 | 18 |
|---|
| Goodwill impairment | - | - | - | - | - | - | 8 | - | 60 | - | - |
|---|
| Deferred income taxes | 1 | 1 | 1 | -2 | -0 | 0 | -1 | 0 | -2 | - | - |
|---|
| Bad debt expense and other reserves | - | - | - | - | - | 1 | 3 | 1 | 1 | 1 | 1 |
|---|
| Stock-based compensation | 29 | 43 | 25 | 32 | 37 | 38 | 23 | 20 | 18 | 14 | 12 |
|---|
| Changes in fair value | - | - | - | - | - | 0 | 0 | 0 | 0 | 1 | 0 |
|---|
| Amortization of lease right-of-use assets | - | - | - | - | - | - | - | - | 4 | 3 | 1 |
|---|
| Gain from equity method investment | - | - | - | - | - | -1 | -2 | -5 | 2 | - | - |
|---|
| Impairment of right-of-use assets | - | - | - | - | - | -1 | -2 | -2 | - | -2 | -7 |
|---|
| Gain on lease exit | - | - | - | - | - | - | - | - | - | 2 | - |
|---|
| Other Noncash Expense | - | - | - | - | - | - | - | 0 | 0 | 1 | 1 |
|---|
| Accounts receivable | 10 | 6 | 4 | 4 | 10 | -1 | -2 | -16 | -2 | 5 | -2 |
|---|
| Prepaid expenses and other assets | - | - | - | - | - | - | -1 | -3 | 0 | -1 | 1 |
|---|
| Accounts payable | 3 | 5 | -5 | 5 | 8 | -5 | -8 | -2 | -3 | -2 | 1 |
|---|
| Accrued employee expenses | 4 | -7 | 1 | -3 | -2 | 1 | 0 | -2 | 2 | -0 | -2 |
|---|
| Operating lease liabilities | - | - | - | - | - | -7 | -6 | -5 | -5 | -7 | -3 |
|---|
| Increase (Decrease) in Accrued Liabilities | 4 | -2 | 2 | -0 | -1 | 11 | -4 | -6 | -1 | 2 | 2 |
|---|
| Other liabilities | -0 | 1 | 2 | 1 | 0 | -0 | 0 | -0 | - | 0 | - |
|---|
| Net cash provided by (used in) operating activities | - | - | - | - | - | 20 | 39 | 14 | -29 | -22 | 8 |
|---|
| Purchase of property and equipment | 16 | 30 | 17 | 20 | 17 | 11 | 10 | 11 | 12 | 12 | 8 |
|---|
| Initial cash consideration | - | - | - | - | - | - | - | - | 16 | - | - |
|---|
| Cash paid for acquisition, net of cash acquired | - | - | - | - | 27 | - | - | - | 12 | - | - |
|---|
| Net cash used in investing activities | - | - | - | - | - | -34 | 102 | -4 | -8 | -12 | -8 |
|---|
| Payment of contingent consideration liability | - | - | - | - | - | - | 2 | 2 | - | 2 | 2 |
|---|
| Proceeds from Stock Options Exercised | 6 | 6 | 9 | 74 | 20 | 3 | 0 | 1 | 0 | 1 | 0 |
|---|
| Taxes paid related to net share settlement of equity awards | 1 | 1 | 1 | 3 | 3 | 3 | 4 | 5 | 3 | 3 | 3 |
|---|
| Payments for the repurchase of common stock | - | - | - | - | - | - | 43 | 32 | 30 | - | 20 |
|---|
| Net cash used in financing activities | - | - | - | - | - | -0 | -49 | -38 | -33 | -4 | -25 |
|---|
| Net decrease in cash, cash equivalents, and restricted cash | - | - | - | - | - | -15 | 92 | -28 | -70 | -39 | -25 |
|---|
| Income taxes | - | - | - | - | - | - | - | - | -0 | 0 | -0 |
|---|
| Share-Based Payment Arrangement, Amount Capitalized | 1 | 1 | 1 | 1 | 2 | 2 | 1 | 1 | 1 | 1 | 1 |
|---|
| Capital Expenditures Incurred but Not yet Paid | 1 | 2 | 1 | 2 | 0 | 0 | 1 | 1 | 1 | 1 | 1 |
|---|
| Changes in right-of-use assets for operating lease obligations | - | - | - | - | - | - | - | - | 3 | 0 | 1 |
|---|
| Increase (Decrease) in Operating Lease Liability | - | - | - | - | - | - | - | - | 4 | 0 | 1 |
|---|