| In millions, except per share items | Dec-31-22 | Dec-31-21 | Dec-31-20 | Dec-31-19 | Dec-31-18 | Dec-31-17 | Dec-31-16 | Dec-31-15 |
| | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K |
| Current assets: | | | | | | | | |
| Cash and cash equivalents | 173.7 | 137.3 | 74.1 | 87.6 | 41.0 | 86.6 | 86.7 | 91.7 |
| Short-term marketable securities | 147.6 | 268.0 | 281.9 | 211.3 | | | 289.6 | 222.2 |
| Accounts receivable, net of allowance of $668 and $736 as of June 30, 2023 and December 31, 2022, respectively | 121.8 | 109.0 | 100.2 | 78.0 | 75.8 | 64.4 | 47.0 | 42.3 |
| Prepaid expenses and other current assets | 30.2 | 32.1 | 19.1 | 18.7 | 14.0 | 16.5 | 9.8 | 7.9 |
| Total current assets | 473.3 | 546.4 | 475.3 | 395.6 | 379.0 | 369.4 | 300.7 | 229.2 |
| Long-term marketable securities | 59.2 | 111.2 | 98.5 | 119.5 | | | | |
| Property and equipment, net | 47.4 | 61.9 | 64.9 | 60.6 | 61.4 | 58.6 | 39.4 | 31.3 |
| Operating leases - right of use asset | 33.8 | 37.0 | 44.8 | 40.6 | | | | |
| Deferred tax assets, net | 45.4 | 25.1 | 15.8 | 18.8 | 26.4 | 25.1 | 16.6 | 16.1 |
| Intangible assets, net | 12.8 | 6.5 | 12.0 | 16.8 | 22.0 | 12.4 | 1.0 | 1.4 |
| Goodwill | 7.4 | 7.4 | 7.4 | 7.4 | 7.2 | 1.5 | 0.3 | 0.3 |
| Restricted cash | 2.7 | 1.2 | 1.2 | 1.2 | 1.2 | 1.2 | 1.2 | |
| Other noncurrent assets | 18.9 | 17.8 | 16.9 | 15.1 | 11.8 | 2.2 | 2.1 | 1.9 |
| Total assets | 700.9 | 814.6 | 736.8 | 675.6 | 585.7 | 537.5 | 407.0 | 323.5 |
| |
| Current liabilities: | | | | | | | | |
| Accounts payable | 2.8 | 1.3 | 0.7 | 0.8 | 5.6 | 1.1 | 2.1 | 2.4 |
| Accrued liabilities | 42.6 | 32.5 | 29.8 | 22.8 | 26.7 | 21.4 | 13.3 | 11.8 |
| Deferred revenues, current | 293.7 | 257.9 | 213.5 | 192.2 | | | | |
| Operating lease liabilities, current | 13.1 | 12.6 | 11.7 | 7.7 | | | | |
| Total current liabilities | 352.2 | 304.3 | 255.7 | 223.5 | 196.9 | 165.8 | 130.3 | 112.2 |
| Deferred revenues, noncurrent | 23.5 | 32.8 | 30.5 | 20.9 | | | | |
| Other noncurrent liabilities | 7.0 | 4.9 | 0.4 | 0.4 | 10.4 | 11.1 | 2.7 | 1.2 |
| Total liabilities | 411.8 | 377.8 | 332.3 | 288.8 | 227.7 | 194.0 | 148.6 | 127.9 |
| |
| Commitments and contingencies (Note 8) | | | | | | | | |
| Stockholders’ equity: | | | | | | | | |
| Common stock: $0.001 par value; 1 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Additional paid-in capital | 512.5 | 477.3 | 401.4 | 362.4 | 330.6 | 304.2 | 266.8 | 223.2 |
| Accumulated other comprehensive loss | -1.9 | 1.0 | -0.5 | 1.2 | -0.6 | -0.6 | -0.2 | -0.2 |
| Accumulated deficit | -221.4 | -41.7 | 3.6 | 23.2 | 28.0 | 39.9 | -8.3 | -27.5 |
| Total stockholders’ equity | 289.1 | 436.7 | 404.5 | 386.8 | 358.0 | 343.5 | 258.4 | 195.6 |
| Total liabilities and stockholders’ equity | 700.9 | 814.6 | 736.8 | 675.6 | 585.7 | 537.5 | 407.0 | 323.5 |