In millions, except per share items | Dec-31-21 | Dec-31-20 | Dec-31-19 | Dec-31-18 | Dec-31-17 | Dec-31-16 | Dec-31-15 | Dec-31-14 |
| 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K |
Net income | -29.9 | -33.4 | -37.6 | -35.4 | -29.1 | -29.8 | -28.4 | -14.2 |
Depreciation and amortization [+] | 1.8 | 1.4 | 0.7 | 0.8 | 2.6 | 2.5 | 2.5 | 3.0 |
Depreciation | 1.8 | 1.4 | 0.7 | 0.8 | 2.6 | 2.5 | 2.5 | 3.0 |
Asset impairment charges | | | | 0.5 | 0.1 | | 0.1 | 0.2 |
Stock-based compensation | 1.9 | 1.6 | 1.6 | 1.2 | 0.7 | 1.2 | 0.7 | 0.2 |
Change in working capital [+] | 0.4 | -1.5 | 0.6 | 2.7 | 0.2 | 0.3 | 0.3 | -1.5 |
Accounts receivable | | | | | | | 0.1 | -0.1 |
Other current assets | -0.1 | 0.0 | 0.1 | 0.0 | 0.0 | 0.0 | -0.2 | 0.2 |
Accounts payable | 0.6 | -1.5 | 1.8 | 0.1 | 0.0 | 0.2 | 0.7 | -2.6 |
Accrued expenses | | | | | | 0.1 | 0.0 | -1.1 |
Deferred revenues | | | | | | | -0.2 | -1.0 |
Other | -0.1 | 0.0 | -1.3 | 2.6 | 0.2 | 0.1 | -0.2 | 3.2 |
Other operating activities | -1.7 | 0.1 | -0.1 | 1.1 | -1.2 | 0.1 | 0.7 | 1.4 |
Cash from operations | -27.6 | -31.7 | -34.8 | -29.1 | -26.8 | -25.7 | -24.2 | -10.9 |
|
Capital expenditures [+] | -5.4 | -8.5 | -11.8 | -5.5 | -1.2 | 0.0 | -0.4 | -1.2 |
Purchases of property and equipment | -5.4 | -8.5 | -11.8 | -5.5 | -1.2 | | -0.4 | -1.2 |
Sales of property and equipment | | | | 0.0 | 0.0 | 0.1 | | |
Purchases of short-term investments, net | | | 13.9 | -13.7 | 0.0 | 30.2 | -30.5 | |
Purchases of short-term investments | | | -3.5 | -29.8 | -8.3 | | -42.6 | |
Sales of short-term investments | | | 17.4 | 16.1 | 8.3 | 30.2 | 12.1 | |
Other cash from investing | | | | | | 0.0 | 0.0 | 0.0 |
Cash from investing | -5.4 | -8.5 | 2.2 | -19.2 | -1.2 | 30.3 | -30.9 | -1.1 |
|
Issuance of common stock, net | | | | | 26.6 | | 47.1 | |
Option exercises | | | | | 0.1 | 0.0 | 0.0 | 0.0 |
Other cash from financing | 8.8 | 69.2 | 29.8 | 45.8 | -1.5 | 3.8 | 13.4 | 7.4 |
Cash from financing | 8.8 | 69.2 | 29.8 | 45.8 | 25.0 | 3.8 | 60.5 | 7.3 |
|
Free cash flow | -33.0 | -40.2 | -46.6 | -34.6 | -28.1 | -25.7 | -24.6 | -12.1 |
Per share (diluted) | ($0.29) | ($0.59) | ($2.84) | ($3.66) | ($16.23) | ($37.33) | ($2.15) | ($2.36) |
|
Cash paid for interest | 0.6 | 1.0 | 0.8 | 0.9 | 0.9 | 1.2 | 3.6 | 0.2 |
Cash paid for income taxes | | | 0.0 | | | | | |