In millions, except per share items | Dec-31-22 | Dec-31-21 | Dec-31-20 | Dec-31-19 | Dec-31-18 | Dec-31-17 |
| 10-K | 10-K | 10-K | 10-K | 10-K | 10-K |
Net income | -196.4 | -236.1 | -175.8 | -101.8 | -84.7 | -54.9 |
Depreciation and amortization | 27.7 | 23.5 | 18.8 | 13.4 | 9.3 | 5.6 |
Stock-based compensation | 46.1 | 48.8 | 24.3 | 7.7 | 2.9 | 1.9 |
Change in working capital [+] | 94.7 | 29.9 | 39.3 | 26.4 | 25.6 | 14.8 |
Accounts receivable | -6.1 | -1.6 | -0.3 | -1.6 | -1.6 | -4.2 |
Inventories | 28.0 | -28.7 | -20.4 | -11.6 | -3.7 | -3.9 |
Other current assets | -3.0 | -4.0 | -3.4 | -4.1 | -5.3 | -2.4 |
Accounts payable | 4.9 | -10.0 | 2.8 | 6.0 | -2.6 | -0.1 |
Other | 70.7 | 74.2 | 60.7 | 37.7 | 38.8 | 25.4 |
Other operating activities | -63.6 | -8.3 | -41.0 | -0.2 | -0.3 | -6.0 |
Cash from operations | -91.6 | -142.2 | -134.4 | -54.5 | -47.2 | -38.6 |
|
Capital expenditures [+] | -36.9 | -47.4 | -26.9 | -34.0 | -19.1 | -14.1 |
Purchases of property and equipment | -22.9 | -37.5 | -18.3 | -24.8 | -13.4 | -11.6 |
Capitalized product costs | -14.1 | -10.0 | -8.7 | -9.3 | -5.7 | -2.5 |
Sales of short-term investments, net [+] | | 4.0 | 204.9 | -181.3 | -14.8 | 2.8 |
Purchases of short-term investments | | | -73.3 | -220.6 | -31.5 | -27.5 |
Sales of short-term investments | | 4.0 | 278.2 | 39.3 | 16.6 | 30.3 |
Cash from investing | -36.9 | -43.4 | 178.0 | -215.4 | -33.9 | -11.3 |
|
Issuance of common stock, net | 1.4 | 2.3 | 1.0 | 315.5 | | |
Financing costs | | | | | -0.5 | |
Other cash from financing | 2.7 | 250.6 | 151.8 | 63.1 | 105.5 | 46.7 |
Cash from financing | 4.1 | 252.9 | 152.8 | 378.7 | 106.1 | 46.7 |
|
Free cash flow | -114.4 | -179.6 | -152.7 | -79.3 | -60.6 | -50.2 |
Per share (diluted) | ($1.34) | ($2.07) | ($1.84) | ($1.86) | ($7.93) | ($6.47) |
|
Cash paid for interest | 8.1 | 6.6 | 0.0 | 0.6 | 0.7 | 0.7 |
Cash paid for income taxes | 0.3 | 0.1 | 0.1 | 0.1 | 0.0 | 0.0 |