| In millions, except per share items | Sep-30-21 | Jun-30-21 | Mar-31-21 | Dec-31-20 | Sep-30-20 | Jun-30-20 | Mar-31-20 | Dec-31-19 |
| | 10-Q | 10-Q | 10-Q | 10-K | 10-Q | 10-Q | 10-Q | 10-K |
| Revenues | 157.6 | 120.3 | 102.7 | 93.8 | 95.1 | 100.8 | 112.2 | 118.4 |
| Revenue growth | 65.8% | 19.4% | -8.5% | -20.7% | -22.1% | -15.6% | 6.5% | 34.5% |
| Cost of goods sold | 3.1 | 2.4 | 2.5 | 2.8 | 3.1 | 3.1 | 2.8 | 2.6 |
| Gross profit | 154.5 | 117.9 | 100.2 | 91.1 | 92.0 | 97.7 | 109.4 | 115.8 |
| Gross margin | 98.0% | 98.0% | 97.5% | 97.1% | 96.8% | 96.9% | 97.5% | 97.8% |
| Selling, general and administrative [+] | 16.0 | 15.5 | 16.6 | 18.0 | 18.7 | 20.0 | 20.4 | 20.8 |
| General and administrative [+] | 16.0 | 15.5 | 16.6 | 18.0 | 18.7 | 20.0 | 20.4 | 20.8 |
| General and administrative expenses | 16.0 | 15.5 | 16.6 | 18.0 | 18.7 | 20.0 | 20.4 | 20.8 |
| Other operating expenses | 31.8 | 30.9 | 30.9 | 32.1 | 32.5 | 33.3 | 33.3 | 33.2 |
| EBITDA [+] | 106.7 | 71.5 | 52.7 | 41.0 | 40.9 | 44.5 | 55.7 | 61.8 |
| EBITDA growth | 161.0% | 60.7% | -5.3% | -33.7% | -39.2% | -33.4% | -2.0% | 41.3% |
| EBITDA margin | 67.7% | 59.4% | 51.3% | 43.7% | 43.0% | 44.1% | 49.6% | 52.2% |
| Depreciation and amortization | 46.8 | 43.7 | 43.4 | 46.6 | 49.7 | 52.5 | 53.9 | 50.7 |
| EBIT [+] | 59.9 | 27.7 | 9.3 | -5.6 | -8.8 | -8.0 | 1.7 | 11.1 |
| EBIT growth | -782.1% | -444.6% | 439.3% | -150.4% | -142.1% | -131.4% | -92.6% | -34.5% |
| EBIT margin | 38.0% | 23.1% | 9.1% | -6.0% | -9.2% | -8.0% | 1.5% | 9.4% |
| Non-recurring items [+] | | | | 37.0 | 17.2 | 14.1 | | |
| Asset impairment | | | | 37.0 | 17.2 | 14.1 | | |
| Interest expense | 7.9 | 7.4 | 7.0 | 7.0 | 7.4 | 7.6 | 9.3 | 11.0 |
| Interest expense | 7.9 | 7.4 | 7.0 | 7.0 | 7.4 | 7.6 | 9.3 | 11.0 |
| Other income (expense), net [+] | -96.0 | -29.7 | -8.9 | 4.6 | -3.9 | 11.0 | 23.4 | 13.2 |
| Gain (loss) on debt retirement | | | -0.9 | | | | | |
| Gain (loss) on derivative instruments | -95.1 | -28.8 | -8.0 | 4.4 | -4.0 | 10.8 | 25.2 | 15.0 |
| Pre-tax income | -63.9 | -32.2 | -43.6 | -45.1 | -37.2 | -18.8 | 15.9 | 13.3 |
| Income taxes | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Tax rate | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% |
| Net income | -63.9 | -32.2 | -43.6 | -45.1 | -37.2 | -18.8 | 15.9 | 13.3 |
| Net margin | -40.5% | -26.8% | -42.5% | -48.1% | -39.1% | -18.7% | 14.2% | 11.2% |
| |
| Basic EPS [+] | ($4.81) | ($2.48) | ($3.41) | ($3.59) | ($2.98) | ($1.52) | $1.29 | $1.09 |
| Growth | 61.5% | 63.0% | -364.4% | -429.5% | -261.3% | -182.7% | 102.2% | 618.6% |
| Diluted EPS [+] | ($4.69) | ($2.41) | ($3.32) | ($3.49) | ($2.81) | ($1.39) | $1.13 | $0.94 |
| Growth | 66.7% | 73.8% | -394.4% | -472.4% | -278.0% | -189.1% | 100.2% | 577.7% |
| |
| Shares outstanding (basic) [+] | 13.3 | 13.0 | 12.8 | 12.6 | 12.5 | 12.4 | 12.3 | 12.2 |
| Growth | 6.3% | 5.0% | 3.9% | 3.0% | 3.5% | 3.8% | 4.4% | 5.7% |
| Shares outstanding (diluted) [+] | 13.6 | 13.4 | 13.2 | 12.9 | 13.2 | 13.6 | 14.1 | 14.2 |
| Growth | 3.0% | -1.6% | -6.7% | -8.9% | -6.2% | -3.7% | 5.4% | 12.0% |
| |
| EBIT is a non-GAAP figure that excludes all non-recurring expenses: restructuring costs, asset impairments, IPR&D writeoffs, and other unusual charges. |