| In millions, except per share items | Dec-31-22 | Dec-31-21 | Dec-31-20 | Dec-31-19 | Dec-31-18 | Dec-05-18 | Dec-31-17 | Dec-31-16 |
| | 10-K | 10-K | 10-K | 10-K | 10-K | 8-K | 10-K | 10-K |
| Assets | | | | | | | | |
| Current assets: | | | | | | | | |
| Cash and cash equivalents | 69.9 | 59.4 | 69.7 | 72.8 | 67.9 | 67.9 | 50.6 | 13.2 |
| Marketable investments | 118.2 | 195.5 | 195.2 | 116.6 | 133.0 | | 164.0 | 115.5 |
| Accounts receivable, net of allowance for credit losses | 203.4 | 133.9 | 114.6 | 105.9 | 81.9 | 81.9 | 58.0 | 43.3 |
| Inventories | 334.0 | 263.5 | 219.5 | 153.0 | 115.7 | 115.7 | 94.9 | 73.0 |
| Prepaid expenses and other current assets | 30.3 | 29.2 | 18.7 | 14.9 | 12.2 | 12.2 | 14.7 | 18.7 |
| Total current assets | 755.7 | 681.5 | 617.7 | 463.1 | 410.7 | 410.7 | 382.2 | 263.8 |
| Property and equipment, net | 65.0 | 58.9 | 48.2 | 51.8 | 35.4 | 35.4 | 30.9 | 21.5 |
| Operating lease right-of-use assets | 192.6 | 132.0 | 41.2 | 43.7 | | | | |
| Finance lease right-of-use assets | 33.3 | 36.3 | 38.1 | 39.9 | | | | |
| Intangible assets, net | 81.2 | 90.6 | 10.6 | 25.4 | 27.2 | 27.2 | 23.8 | |
| Goodwill | 166.0 | 166.4 | 8.4 | 7.7 | 7.8 | 7.8 | 8.2 | |
| Deferred taxes | 64.2 | 65.7 | 50.1 | 31.3 | 32.9 | 32.9 | 26.7 | 22.5 |
| Other non-current assets | 12.8 | 13.0 | 8.7 | 2.9 | 0.9 | 0.9 | 1.0 | 0.5 |
| Total assets | 1,370.9 | 1,244.3 | 823.0 | 665.9 | 515.0 | 515.0 | 476.7 | 308.3 |
| |
| Liabilities and Stockholders’ Equity | | | | | | | | |
| Current liabilities: | | | | | | | | |
| Accounts payable | 26.7 | 13.4 | 14.1 | 15.1 | 8.2 | 8.2 | 6.8 | 4.1 |
| Accrued liabilities | 106.3 | 99.8 | 85.8 | 67.6 | 57.9 | 57.9 | 44.8 | 31.7 |
| Current operating lease liabilities | 10.0 | 8.3 | 4.7 | 4.1 | | | | |
| Current finance lease liabilities | 1.9 | 1.7 | 1.3 | 4.2 | | | | |
| Total current liabilities | 144.9 | 123.2 | 105.9 | 91.0 | 66.1 | 66.1 | 51.6 | 35.8 |
| Non-current operating lease liabilities | 199.0 | 137.0 | 44.2 | 47.2 | | | | |
| Non-current finance lease liabilities | 24.9 | 26.5 | 27.1 | 26.7 | | | | |
| Other non-current liabilities | 3.3 | 3.6 | 8.0 | 15.3 | 18.9 | 18.9 | 18.5 | 0.8 |
| Total liabilities | 372.0 | 290.3 | 185.2 | 180.3 | 92.6 | 92.6 | 76.3 | 41.7 |
| |
| Commitments and contingencies (Note 10) | | | | | | | | |
| Stockholders’ equity: | | | | | | | | |
| Preferred stock, $.001 par value per share - 5,000,000 shares authorized, none issued and outstanding at December 31, 2022 and December 31, 2021 | | | | | | | | |
| Common stock, $0.001 par value per share | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Additional paid-in capital | 963.0 | 910.6 | 598.3 | 430.7 | 415.1 | 415.1 | 396.8 | 273.9 |
| Accumulated other comprehensive loss | -8.1 | -2.6 | 2.5 | -2.3 | -1.9 | -1.9 | 1.6 | -4.7 |
| Retained earnings | 43.9 | 45.9 | 40.6 | 57.5 | 9.1 | 9.1 | 2.0 | -2.7 |
| Total stockholders’ equity | 998.9 | 953.9 | 637.8 | 485.6 | 422.4 | | 400.4 | |
| Total liabilities and stockholders’ equity | 1,370.9 | 1,244.3 | 823.0 | 665.9 | 515.0 | 515.0 | 476.7 | 308.3 |