| In millions, except per share items | Mar-31-23 | Jun-30-22 | Mar-31-22 | Dec-31-21 | Sep-30-21 | Jun-30-21 | Mar-31-21 | Dec-31-20 |
| | 10-Q | 10-Q | 10-Q | 10-K | 10-Q | 10-Q | 10-Q | 10-K |
| Operating activities: | | | | | | | | |
| Net loss | -50.7 | -64.5 | -42.4 | -18.4 | -17.2 | -11.1 | -11.6 | -415.6 |
| Adjustments to reconcile net loss to net cash used in operating activities: | | | | | | | | |
| Stock-based compensation expense | 42.1 | 36.3 | 26.0 | 26.9 | 26.0 | 26.9 | 16.2 | 14.3 |
| Depreciation and amortization | 6.5 | 6.5 | 6.2 | 5.8 | 5.7 | 4.9 | 4.8 | 3.9 |
| Amortization of right-of-use assets | 2.1 | 1.9 | 1.8 | 1.5 | 1.6 | 2.3 | 1.7 | 1.5 |
| Realized loss on marketable securities | 1.7 | | | | | | | |
| Other | 0.2 | | 0.2 | | | | | |
| Changes in operating assets and liabilities: | | | | | | | | |
| Accounts receivable | 26.3 | 0.3 | 8.7 | -6.8 | -19.4 | -1.6 | -6.2 | -15.2 |
| Inventory | -0.4 | -7.4 | -3.7 | -8.8 | -7.1 | -5.6 | -8.6 | -4.8 |
| Prepaid expenses and other current assets | -4.3 | -1.5 | -3.9 | 0.2 | -0.2 | 0.5 | -1.6 | -1.9 |
| Other noncurrent assets | -10.5 | 0.0 | 0.2 | 0.7 | 0.1 | 0.1 | 0.2 | -0.1 |
| Accounts payable | -0.8 | 7.4 | 2.9 | -1.1 | 2.5 | -1.2 | 10.9 | -4.5 |
| Accrued compensation and other related benefits | -15.1 | 5.3 | -13.3 | 4.5 | 6.1 | 4.4 | 1.3 | 4.2 |
| Deferred revenue | 1.1 | 1.4 | 0.2 | | 0.3 | 0.6 | 0.3 | |
| Accrued expenses and other current liabilities | -0.2 | -1.4 | -3.5 | 1.7 | 4.0 | 0.7 | -7.2 | 16.5 |
| Operating lease liability | -2.3 | -1.8 | -0.4 | 0.0 | 0.7 | -1.7 | -1.4 | -1.7 |
| Other noncurrent liabilities | 0.3 | 0.2 | 0.2 | -0.6 | 0.2 | -0.8 | -3.5 | -0.6 |
| Net cash used in operating activities | -4.1 | -17.0 | -20.8 | 5.8 | -26.2 | 3.1 | -4.1 | -130.2 |
| |
| Investing activities: | | | | | | | | |
| Purchases of property and equipment | -4.6 | -27.2 | -28.1 | -27.6 | -20.2 | -14.6 | -38.9 | -21.3 |
| Acquisition of intangible assets | -0.7 | | | | | | | -0.9 |
| Purchase of marketable securities | | -29.2 | -242.3 | | | | | |
| Proceeds from sales of marketable securities | 93.3 | 32.7 | 12.7 | | | | | |
| Proceeds from maturities of marketable securities | 31.9 | 9.1 | 0.3 | | | | | |
| Net cash provided by (used in) investing activities | 120.0 | -27.5 | -257.6 | -27.6 | -20.2 | -14.6 | -44.3 | -22.3 |
| |
| Financing activities: | | | | | | | | |
| Payments on financing arrangement | -5.8 | | -5.4 | | | | -5.0 | 0.0 |
| Issuance of common stock from exercise of stock options | 2.4 | 6.4 | 7.8 | 8.9 | 6.7 | 16.2 | 8.5 | 8.5 |
| Net cash (used in) provided by financing activities | -3.4 | 6.4 | 2.4 | 8.9 | 6.7 | 16.2 | 3.5 | 7.7 |
| Effect of exchange rate changes on cash, cash equivalents, and restricted cash | 0.0 | | 0.0 | | | | | |
| Net increase (decrease) in cash, cash equivalents, and restricted cash | 112.4 | | -276.0 | | | | | |
| |
| Supplemental disclosures of cash flow information: | | | | | | | | |
| Cash paid for interest | 0.4 | | 0.8 | | | | 1.2 | |
| Cash paid for taxes | 2.5 | 0.4 | 2.9 | 0.3 | 0.5 | 1.0 | 6.8 | 0.1 |
| Noncash investing and financing activities: | | | | | | | | |
| Purchases of property and equipment included in accounts payable and accrued expenses and other current liabilities | 30.7 | 11.7 | 15.0 | 4.3 | 5.2 | 4.7 | 2.8 | -11.2 |
| Right-of-use assets obtained in exchange for new operating lease liabilities | 6.9 | | 16.6 | 1.7 | 8.3 | 0.0 | 11.2 | 2.7 |
| Contingent consideration payable from business acquisition | | | 1.5 | | | 0.0 | 1.5 | |