| In millions, except per share items | Jun-30-23 | Mar-31-23 | Dec-31-22 | Sep-30-22 | Jun-30-22 | Mar-31-22 | Dec-31-21 | Sep-30-21 |
| | 10-Q | 10-Q | 10-K | 10-Q | 10-Q | 10-Q | 10-K | 10-Q |
| Current assets: | | | | | | | | |
| Cash and cash equivalents | 186.1 | 193.9 | 173.7 | 193.9 | 121.0 | 166.3 | 137.3 | 145.7 |
| Short-term marketable securities | 163.1 | 139.9 | 147.6 | 191.4 | 298.1 | 290.9 | 268.0 | 199.9 |
| Accounts receivable, net of allowance of $668 and $736 as of June 30, 2023 and December 31, 2022, respectively | 124.9 | 101.8 | 121.8 | 98.7 | 97.7 | 89.3 | 109.0 | 84.3 |
| Prepaid expenses and other current assets | 34.0 | 29.2 | 30.2 | 38.7 | 35.0 | 26.8 | 32.1 | 22.9 |
| Total current assets | 508.2 | 464.7 | 473.3 | 522.7 | 551.7 | 573.2 | 546.4 | 452.9 |
| Long-term marketable securities | 38.8 | 44.6 | 59.2 | 71.0 | 80.1 | 82.4 | 111.2 | 136.1 |
| Property and equipment, net | 40.4 | 45.2 | 47.4 | 53.9 | 57.8 | 63.4 | 61.9 | 63.3 |
| Operating leases - right of use asset | 28.0 | 30.7 | 33.8 | 31.5 | 33.5 | 34.6 | 37.0 | 37.8 |
| Deferred tax assets, net | 54.9 | 49.9 | 45.4 | 39.8 | 35.4 | 30.0 | 25.1 | 31.4 |
| Intangible assets, net | 11.3 | 12.0 | 12.8 | 2.0 | 3.4 | 4.8 | 6.5 | 8.3 |
| Goodwill | 7.4 | 7.4 | 7.4 | 7.4 | 7.4 | 7.4 | 7.4 | 7.4 |
| Restricted cash | 2.7 | 2.7 | 2.7 | 1.2 | 1.2 | 1.2 | 1.2 | 1.2 |
| Other noncurrent assets | 17.9 | 18.5 | 18.9 | 18.0 | 18.4 | 17.6 | 17.8 | 17.9 |
| Total assets | 709.6 | 675.8 | 700.9 | 747.6 | 789.0 | 814.6 | 814.6 | 756.2 |
| |
| Current liabilities: | | | | | | | | |
| Accounts payable | 2.2 | 1.7 | 2.8 | 1.3 | 2.1 | 2.5 | 1.3 | 1.1 |
| Accrued liabilities | 52.6 | 41.8 | 42.6 | 42.8 | 38.0 | 37.1 | 32.5 | 33.9 |
| Deferred revenues, current | 302.4 | 296.5 | 293.7 | 278.9 | 275.7 | 266.9 | 257.9 | 237.5 |
| Operating lease liabilities, current | 11.9 | 12.9 | 13.1 | 11.0 | 11.5 | 12.0 | 12.6 | 12.2 |
| Total current liabilities | 369.1 | 353.0 | 352.2 | 334.0 | 327.4 | 318.5 | 304.3 | 284.7 |
| Deferred revenues, noncurrent | 34.8 | 21.9 | 23.5 | 24.2 | 28.4 | 31.1 | 32.8 | 27.5 |
| Operating lease liabilities, noncurrent | 22.9 | 25.9 | | | | | | |
| Other noncurrent liabilities | 5.8 | 7.1 | 7.0 | 5.3 | 5.1 | 5.0 | 4.9 | 3.7 |
| Total liabilities | 432.6 | 407.9 | 411.8 | 392.4 | 392.2 | 387.9 | 377.8 | 353.2 |
| |
| Commitments and contingencies (Note 8) | | | | | | | | |
| Stockholders’ equity: | | | | | | | | |
| Preferred stock: $0.001 par value; 20,000 shares authorized, no shares issued and outstanding as of June 30, 2023 and December 31, 2022 | | | | | | | | |
| 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 | 534.0 | 521.7 | 512.5 | 510.6 | 493.7 | 485.7 | 477.3 | 433.8 |
| Accumulated other comprehensive loss | -1.7 | -1.6 | -1.9 | 0.0 | -0.6 | -0.7 | 1.0 | 0.8 |
| Accumulated deficit | -255.3 | -252.4 | -221.4 | -155.5 | -96.3 | -58.4 | -41.7 | -31.7 |
| Total stockholders’ equity | 277.0 | 267.8 | 289.1 | 355.2 | 396.8 | 426.6 | 436.7 | 403.0 |
| Total liabilities and stockholders’ equity | 709.6 | 675.8 | 700.9 | 747.6 | 789.0 | 814.6 | 814.6 | 756.2 |