| In millions, except per share items | Dec-31-22 | Dec-31-21 | Dec-31-20 | Dec-31-19 |
| | 10-K | 10-K | 10-K | 10-K |
| Cash flows from operating activities | | | | |
| Net loss | -114.0 | -38.8 | -32.6 | -51.4 |
| |
| Adjustments to reconcile net loss to net cash (used in) from operating activities: | | | | |
| Depreciation and amortization | 6.7 | 5.3 | 4.1 | 2.7 |
| Stock-based compensation expense, net | 95.3 | 17.0 | 5.3 | 3.6 |
| Other | 0.4 | 0.5 | 0.0 | 0.0 |
| Changes in operating assets and liabilities: | | | | |
| Disbursement prefunding | -38.4 | -18.1 | -69.7 | 17.1 |
| Customer funds receivable | -126.9 | -17.3 | -20.0 | -17.4 |
| Prepaid expenses and other assets | -4.6 | -12.6 | -2.0 | -2.2 |
| Operating lease right-of-use assets | 3.8 | 2.8 | 2.4 | 2.0 |
| Accounts payable | 5.5 | -3.0 | 4.0 | -1.5 |
| Customer liabilities | 43.0 | 16.1 | -29.1 | 54.2 |
| Accrued expenses and other liabilities | 26.3 | 26.1 | 25.9 | 3.5 |
| Operating lease liabilities | -4.1 | -3.3 | -2.5 | -2.2 |
| Net cash (used in) provided by operating activities | -105.1 | -18.4 | -114.2 | 8.4 |
| |
| Cash flows from investing activities | | | | |
| Purchases of property and equipment | -3.7 | -2.0 | -2.1 | -5.0 |
| Capitalized internal-use software costs | -3.4 | -2.6 | -2.3 | -2.2 |
| Cash paid for acquisition, net of acquired cash, cash equivalents, and restricted cash | -0.2 | | | |
| Net cash used in investing activities | -7.3 | -4.5 | -4.4 | -7.2 |
| |
| Cash flows from financing activities | | | | |
| Proceeds from exercise of stock options | 11.6 | 8.3 | 2.4 | 1.0 |
| Taxes paid related to net share settlement of equity awards | -0.1 | | | |
| Net cash provided by financing activities | 11.1 | 238.2 | 122.2 | 117.0 |
| |
| Supplemental disclosure of cash flow information | | | | |
| Cash paid for interest | 0.9 | 0.9 | 1.1 | 1.6 |
| Cash paid for income taxes | 2.3 | 0.8 | 0.4 | 0.2 |
| |
| Supplemental disclosure of noncash investing and financing activities | | | | |
| Operating lease right-of-use assets obtained in exchange for operating lease liabilities | 7.4 | 2.5 | 1.5 | 8.5 |
| Vesting of early exercised options | 0.7 | 0.5 | 0.2 | 0.0 |
| Noncash issuance of common stock in connection with ESPP | 3.5 | | | |
| Stock-based compensation expense capitalized to internal-use software | 1.8 | | | |
| |
| Reconciliation of cash, cash equivalents, and restricted cash | | | | |
| Cash and cash equivalents | | | | |
| Restricted cash included in prepaid expenses and other current assets | | | | |
| Restricted cash included in other noncurrent assets, net | | | | |