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 |
Assets | | | | | | | | |
Current assets: | | | | | | | | |
Cash and cash equivalents | 57.7 | 50.6 | 52.2 | 87.6 | 61.2 | 213.6 | 101.1 | 57.8 |
Marketable securities | 226.6 | 265.3 | 293.6 | 285.9 | 333.5 | 211.1 | 53.2 | 63.0 |
Prepaid expenses and other current assets | 6.2 | 4.7 | 5.6 | 4.2 | 5.3 | 5.1 | 5.3 | 3.1 |
Total current assets | 290.5 | 320.7 | 351.4 | 377.8 | 400.1 | 429.8 | 459.6 | 124.0 |
Property and equipment, net | 14.6 | 15.2 | 15.3 | 15.9 | 16.5 | | 17.6 | |
Restricted cash | 1.7 | 1.7 | 1.7 | 0.0 | 1.7 | | 1.7 | |
Other assets | 1.2 | 2.4 | 2.4 | 2.4 | 2.4 | 2.4 | 2.4 | 2.4 |
Operating lease right-of-use assets | 31.6 | 32.9 | 34.1 | 36.2 | 36.3 | | 38.5 | |
Total assets | 339.6 | 372.9 | 404.9 | 433.9 | 456.9 | 488.3 | 519.8 | 186.1 |
|
Liabilities and Stockholders’ Equity (Deficit) | | | | | | | | |
Current liabilities: | | | | | | | | |
Accounts payable | 6.9 | 7.3 | 5.4 | 5.3 | 3.6 | 5.1 | 3.8 | 3.8 |
Accrued expenses and other current liabilities | 8.1 | 8.8 | 11.0 | 10.1 | 8.1 | 7.0 | 9.6 | 7.2 |
Operating lease liabilities | 7.7 | 6.3 | 6.0 | 6.7 | 5.7 | | 7.0 | |
Deferred revenue | 33.9 | 33.3 | 32.8 | 33.2 | 30.6 | | 28.3 | |
Total current liabilities | 56.6 | 55.8 | 55.2 | 55.2 | 48.0 | 48.2 | 48.7 | 19.3 |
Operating lease liabilities, net of current portion | 40.3 | 43.5 | 45.5 | 46.5 | 49.1 | | 51.3 | |
Deferred revenue, net of current portion | 292.0 | 298.2 | 304.0 | 307.8 | 312.1 | | 322.7 | |
Other liabilities | | | 0.0 | 0.1 | 0.1 | 0.1 | 0.1 | 0.2 |
Total liabilities | 388.9 | 397.5 | 404.8 | 409.6 | 409.3 | 415.9 | 422.9 | 105.1 |
|
Commitments and contingencies (Note 10) | | | | | | | | |
Stockholders’ equity (deficit): | | | | | | | | |
Common stock | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
Additional paid-in capital | 386.5 | 381.9 | 377.2 | 373.4 | 369.3 | 364.8 | 361.1 | 316.1 |
Accumulated other comprehensive loss | -2.7 | -2.9 | -4.0 | -4.9 | -3.2 | -1.2 | 0.0 | 0.0 |
Accumulated deficit | -433.1 | -403.6 | -373.1 | -344.3 | -318.5 | -291.2 | -264.3 | -235.1 |
Total stockholders’ equity (deficit) | -49.4 | -24.6 | 0.1 | 24.3 | 47.6 | 72.4 | 96.9 | 81.0 |
Total liabilities and stockholders’ equity (deficit) | 339.6 | 372.9 | 404.9 | 433.9 | 456.9 | 488.3 | 519.8 | 186.1 |