| In millions, except per share items | Jun-30-23 | Mar-31-23 | Dec-31-22 | Jun-30-22 | Mar-31-22 | Dec-31-21 | Sep-30-21 | Jun-30-21 |
| | 10-Q | 10-Q | 10-K | 10-Q | 10-Q | 10-K | 10-Q | 10-Q |
| Assets | | | | | | | | |
| Current assets: | | | | | | | | |
| Cash and cash equivalents | 14.9 | 4.1 | 5.1 | 27.2 | 24.0 | 24.6 | 140.7 | 332.6 |
| Investments | 62.2 | 91.7 | 108.1 | 160.2 | 192.4 | 226.0 | 185.3 | |
| Accounts receivable, net | 7.6 | 6.8 | 7.0 | 4.9 | 5.5 | 4.9 | 3.0 | 2.8 |
| Inventory | 32.5 | 33.1 | 29.8 | 20.6 | 16.3 | 12.4 | 9.0 | 4.9 |
| Prepaid expenses and other current assets | 5.4 | 6.9 | 9.7 | 3.5 | 4.1 | 5.9 | 4.0 | 1.7 |
| Total current assets | 122.6 | 142.6 | 157.3 | 216.3 | 242.4 | 272.4 | 342.0 | 342.0 |
| Restricted cash | 0.4 | 0.4 | 0.4 | | | | | |
| Property and equipment, net | 20.3 | 19.1 | 18.0 | 13.9 | 12.7 | 10.3 | 8.6 | 6.1 |
| Operating lease right-of-use assets | 6.7 | 7.1 | 7.2 | 6.4 | 6.8 | 6.7 | | |
| Finance lease right-of-use assets | 3.6 | 3.7 | | | | | | |
| Intangible assets, net | 37.6 | 39.4 | 41.1 | 24.0 | 25.4 | 26.8 | 1.2 | 1.3 |
| Goodwill | 77.3 | 77.3 | 77.3 | 56.3 | 56.3 | 56.2 | 7.2 | 7.2 |
| Other long-term assets | 3.0 | 2.8 | 2.4 | 0.8 | 0.8 | 0.7 | 0.6 | 0.3 |
| Total assets | 271.4 | 292.2 | 307.5 | 321.6 | 348.2 | 377.1 | 359.7 | 356.8 |
| |
| Liabilities and stockholders’ equity | | | | | | | | |
| Current liabilities: | | | | | | | | |
| Accounts payable | 11.9 | 15.8 | 12.5 | 7.7 | 6.6 | 10.8 | 7.9 | 3.7 |
| Accrued expenses | 16.0 | 16.1 | 17.2 | 14.5 | 8.9 | 8.6 | 9.4 | 6.5 |
| Contract liabilities | 1.0 | 1.1 | | | | | | |
| Operating lease liability | 2.0 | 2.2 | 2.3 | 1.8 | 1.7 | 1.5 | | |
| Finance lease liability | 0.3 | 0.3 | | | | | | |
| Contingent consideration | 10.0 | 9.5 | 9.4 | 9.2 | | | | |
| Total current liabilities | 33.5 | 38.1 | 35.9 | 27.9 | 18.7 | 21.8 | 17.7 | 10.7 |
| Operating lease liability, net of current portion | 4.8 | 5.0 | 5.5 | 5.1 | 5.5 | 5.3 | | |
| Finance lease liability, net of current portion | 3.6 | 3.6 | | | | | | |
| Contingent consideration, net of current portion | 14.6 | 13.7 | 13.0 | | | 9.1 | | |
| Long-term contract liabilities | 0.2 | 0.2 | | | | | | |
| Total liabilities | 56.6 | 60.7 | 58.1 | 36.8 | 37.0 | 40.0 | 18.1 | 10.9 |
| |
| Commitments and contingencies (Note 6) | | | | | | | | |
| Stockholders’ equity: | | | | | | | | |
| Common stock | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Additional paid-in capital | 639.8 | 618.0 | 599.2 | 564.9 | 558.9 | 553.7 | 534.8 | 518.3 |
| Accumulated deficit | -424.8 | -385.8 | -348.7 | -278.2 | -246.1 | -216.1 | -193.2 | -172.4 |
| Accumulated other comprehensive loss | -0.3 | -0.7 | -1.1 | -1.9 | -1.6 | -0.5 | -0.1 | |
| Total stockholders’ equity | 214.8 | 231.5 | 249.4 | 284.7 | 311.2 | 337.1 | 341.6 | 345.9 |
| Total liabilities and stockholders’ equity | 271.4 | 292.2 | 307.5 | 321.6 | 348.2 | 377.1 | 359.7 | 356.8 |