| In millions, except per share items | Dec-31-20 | Dec-31-19 | Dec-31-18 | Dec-31-17 | Dec-31-16 | Dec-31-15 | Dec-31-14 | Dec-31-13 |
| | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K |
| Revenues | 237.4 | 263.8 | 250.8 | 204.4 | 159.3 | 139.6 | 119.3 | 106.7 |
| Revenue growth | -10.0% | 5.2% | 22.7% | 28.3% | 14.1% | 17.0% | 11.8% | 4.1% |
| Cost of goods sold | 114.8 | 119.6 | 113.6 | 47.6 | 42.3 | 33.5 | 25.5 | 18.4 |
| Gross profit | 122.6 | 144.2 | 137.2 | 156.8 | 117.0 | 106.1 | 93.8 | 88.3 |
| Gross margin | 51.7% | 54.7% | 54.7% | 76.7% | 73.4% | 76.0% | 78.6% | 82.8% |
| Selling, general and administrative [+] | 127.5 | 143.3 | 136.5 | 147.2 | 117.6 | 105.0 | 33.8 | 76.6 |
| Sales and marketing | | | | 20.9 | 18.7 | 19.7 | 16.4 | 14.2 |
| General and administrative [+] | | | | 126.3 | 98.8 | 85.3 | 17.5 | 15.1 |
| General and administrative expenses | | | | 35.6 | 29.7 | 22.4 | 17.5 | 15.1 |
| Telecommunications expense | | | | 90.7 | 69.1 | 63.0 | | 47.2 |
| Other selling, general and administrative | | | | | | | | 47.2 |
| Research and development | | | | 26.8 | 22.1 | 19.1 | 14.9 | 11.4 |
| Other operating expenses | | | | | 3.4 | 3.6 | 63.1 | 2.3 |
| Adjusted EBITDA | 81.1 | 80.3 | 91.8 | 66.1 | 39.4 | 29.6 | 20.3 | 23.8 |
| Adjusted EBITDA margin | 34.2% | 30.5% | 36.6% | 32.3% | 24.7% | 21.2% | 17.0% | 22.3% |
| Stock-based compensation | 7.6 | 8.6 | 12.3 | 14.2 | 12.8 | 9.4 | 7.2 | 4.5 |
| EBITDA [+] | 73.5 | 71.7 | 79.6 | 51.9 | 26.6 | 20.2 | 13.1 | 19.3 |
| EBITDA growth | 2.4% | -9.8% | 53.3% | 95.4% | 31.2% | 54.1% | -31.9% | -30.9% |
| EBITDA margin | 31.0% | 27.2% | 31.7% | 25.4% | 16.7% | 14.5% | 11.0% | 18.1% |
| Depreciation | 78.3 | 70.9 | 78.8 | 69.1 | 49.2 | 38.3 | 27.4 | 18.9 |
| EBITA | -4.8 | 0.9 | 0.7 | -17.2 | -22.6 | -18.1 | -14.3 | 0.4 |
| EBITA margin | -2.0% | 0.3% | 0.3% | -8.4% | -14.2% | -12.9% | -12.0% | 0.3% |
| Amortization of intangibles | 4.3 | 4.6 | 3.7 | 3.5 | 3.4 | 3.6 | 3.7 | 2.3 |
| EBIT [+] | -9.1 | -3.7 | -3.0 | -20.7 | -26.1 | -21.6 | -18.0 | -1.9 |
| EBIT growth | 146.1% | 23.6% | -85.5% | -20.7% | 20.6% | 20.0% | 851.7% | -117.5% |
| EBIT margin | -3.8% | -1.4% | -1.2% | -10.1% | -16.4% | -15.5% | -15.1% | -1.8% |
| Interest expense, net [+] | 8.4 | 6.6 | 1.7 | 0.2 | 0.2 | 0.0 | -0.1 | -0.2 |
| Interest expense | 9.0 | 8.6 | 2.4 | 0.2 | 0.2 | 0.1 | 0.0 | 0.0 |
| Interest income | 0.6 | 2.0 | 0.7 | 0.0 | 0.0 | 0.1 | 0.1 | 0.2 |
| Other income (expense), net | 0.0 | 0.0 | -0.2 | 0.0 | -0.3 | -0.1 | -0.1 | -0.1 |
| Pre-tax income | -17.6 | -10.3 | -4.9 | -20.9 | -26.6 | -21.7 | -18.1 | -1.9 |
| Income taxes | 0.2 | 0.0 | -5.2 | -2.1 | 0.4 | 0.5 | 0.7 | 1.5 |
| Tax rate | | 0.3% | 105.5% | 10.0% | | | | |
| Minority interest | -0.6 | 0.0 | 1.5 | 0.6 | 0.3 | 0.1 | 0.8 | 0.7 |
| Net income | -17.1 | -10.3 | -1.2 | -19.4 | -27.3 | -22.3 | -19.5 | -4.0 |
| Net margin | -7.2% | -3.9% | -0.5% | -9.5% | -17.2% | -16.0% | -16.4% | -3.7% |
| |
| Basic EPS [+] | ($0.38) | ($0.23) | ($29.00) | ($486.29) | ($0.72) | ($0.60) | ($0.55) | ($0.11) |
| Growth | 64.3% | -99.2% | -94.0% | 67556.4% | 18.8% | 10.8% | 389.6% | -153.2% |
| Diluted EPS [+] | ($0.38) | ($0.23) | ($0.03) | ($0.49) | ($0.72) | ($0.60) | ($0.55) | ($0.11) |
| Growth | 64.3% | 707.3% | -94.0% | -32.3% | 18.8% | 10.8% | 389.6% | -157.1% |
| |
| Shares outstanding (basic) [+] | 44.4 | 44.0 | 0.0 | 0.0 | 38.0 | 36.8 | 35.8 | 35.6 |
| Growth | 1.1% | 104442.9% | 5.6% | -99.9% | 3.2% | 3.1% | 0.5% | 2.3% |
| Shares outstanding (diluted) [+] | 44.4 | 44.0 | 42.1 | 39.8 | 38.0 | 36.8 | 35.8 | 35.6 |
| Growth | 1.1% | 4.5% | 5.6% | 4.7% | 3.2% | 3.1% | 0.5% | -4.7% |
| |
| EBIT is a non-GAAP figure that excludes all non-recurring expenses: restructuring costs, asset impairments, IPR&D writeoffs, and other unusual charges. |