| 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 | 8-K |
| Assets | | | | | | | | |
| Current assets | | | | | | | | |
| Cash and cash equivalents | 85.7 | 90.7 | 124.2 | 181.8 | 243.2 | 269.1 | 288.6 | 296.7 |
| Short-term investments | 50.4 | 60.8 | 43.7 | | | | | |
| Accounts receivable, net of allowance for expected credit losses ($183 and $1,559, respectively) | 27.1 | 26.1 | 29.3 | 30.1 | 26.6 | 22.8 | 26.8 | 24.1 |
| Inventory | 29.6 | 29.3 | 26.4 | 24.6 | 19.3 | 12.8 | 10.4 | 11.3 |
| Prepaid expenses | 1.0 | 2.3 | 2.8 | 3.6 | 1.3 | 3.6 | 3.9 | 5.4 |
| Other current assets | 3.3 | 3.4 | 3.3 | 2.9 | 2.5 | 1.9 | 0.5 | 0.5 |
| Total current assets | 197.0 | 212.5 | 229.8 | 243.1 | 293.0 | 310.3 | 330.2 | 338.0 |
| Property and equipment, net | 18.4 | 19.1 | 18.3 | 13.4 | 6.9 | 6.7 | 6.3 | 5.3 |
| Intangible assets, net | 16.6 | 17.4 | 17.6 | 15.4 | 2.2 | | | |
| Goodwill | 30.2 | 31.2 | 31.1 | 31.2 | 4.5 | | | |
| Right-of-use assets | 39.3 | 44.6 | | | | | | |
| Other assets | 3.3 | 3.0 | 3.1 | 3.2 | 2.9 | 1.0 | 0.8 | 0.8 |
| Total assets | 304.9 | 327.9 | 345.9 | 351.9 | 356.1 | 329.7 | 337.3 | 344.1 |
| |
| Liabilities and Stockholders' Equity | | | | | | | | |
| Current liabilities | | | | | | | | |
| Accounts payable | 11.6 | 10.5 | 14.4 | 10.8 | 10.5 | 6.7 | 11.4 | 2.2 |
| Accrued expenses | 7.9 | 11.5 | 9.7 | 9.9 | 9.5 | 8.0 | 7.4 | 13.6 |
| Deferred revenue | 8.8 | 9.2 | 8.9 | 6.8 | 5.8 | 6.4 | 6.3 | |
| Lease liabilities | 7.8 | 8.0 | 8.0 | 7.8 | 7.7 | 3.0 | | |
| Other current liabilities | 0.1 | | | 0.0 | 0.1 | 0.1 | 0.3 | 0.3 |
| Total current liabilities | 36.2 | 39.1 | 41.0 | 35.3 | 33.5 | 24.0 | 25.4 | 21.7 |
| Long-term deferred revenue | 5.8 | 5.8 | 5.4 | 4.5 | 4.1 | 3.8 | 3.7 | |
| Contingent earnout liability | 2.4 | 1.6 | 2.4 | 8.7 | 8.1 | 34.8 | 59.7 | |
| Long-term lease liabilities | 38.2 | 39.4 | | | | | | |
| Other liabilities | 3.3 | 3.9 | 4.0 | 4.9 | 2.6 | 2.0 | 2.6 | 4.3 |
| Total liabilities | 85.8 | 89.8 | 93.4 | 93.8 | 89.8 | 75.3 | 93.1 | 111.0 |
| |
| Commitments and contingencies (Note 15) | | | | | | | | |
| Stockholders' equity | | | | | | | | |
| Common stock | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |
| Additional paid-in capital | 358.6 | 357.0 | 352.6 | 350.0 | 333.7 | 325.9 | 319.9 | 309.9 |
| Accumulated deficit | -139.1 | -120.1 | -101.1 | -90.4 | -67.4 | -71.5 | -75.7 | -76.8 |
| Accumulated other comprehensive income | -0.5 | 1.2 | 1.1 | -1.6 | | | | |
| Total stockholders' equity | 219.1 | 238.1 | 252.6 | 258.1 | 266.4 | 254.4 | 244.2 | 233.1 |
| Total liabilities and stockholders' equity | 304.9 | 327.9 | 345.9 | 351.9 | 356.1 | 329.7 | 337.3 | |