In millions, except per share items | Dec-31-22 | Dec-31-21 | Dec-31-20 | Dec-31-19 | Dec-31-18 | Dec-31-17 | Dec-31-16 | Dec-31-15 |
| 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K |
Net product sales | 53.9 | | | 3.3 | 26.3 | 25.1 | 57.4 | 16.1 |
Net product sales growth | | | -100.0% | -87.3% | 4.5% | -56.2% | 256.2% | -73.2% |
Operating costs and expenses: | | | | | | | | |
Cost of sales | 3.5 | | | | | | | |
Research and development | 36.9 | 39.1 | 25.9 | 24.1 | 36.5 | 32.9 | 65.0 | 76.6 |
Selling, general and administrative | 84.8 | 56.2 | 17.6 | 19.2 | 22.1 | 31.4 | 45.3 | 54.0 |
Other operating expenses | 8.5 | | 4.2 | | | | -5.1 | 0.3 |
Total operating costs and expenses | 133.7 | 95.3 | 47.8 | 44.1 | 59.2 | 64.7 | 106.6 | 132.8 |
Loss from operations | -79.8 | -95.3 | -47.8 | -40.7 | -32.9 | -39.5 | -49.2 | -116.7 |
Operating margin | -147.9% | | | -1217.1% | -125.1% | -157.2% | -85.6% | -723.9% |
|
Non-operating expenses: | | | | | | | | |
Interest expense, net | -13.1 | -2.4 | -0.8 | -1.0 | -1.2 | -1.9 | -2.6 | -2.1 |
Other non-operating expenses | -0.1 | -0.2 | 3.9 | | 4.3 | -0.1 | -0.5 | -0.9 |
Total non-operating expenses | -13.2 | -2.6 | -4.7 | -0.1 | 3.5 | -1.3 | -3.8 | -4.1 |
Net loss | -93.0 | -97.9 | -52.5 | -40.0 | -29.3 | -40.7 | -52.0 | -119.4 |
|
Net loss per common share: Basic (in dollars per share) | ($0.81) | ($1.09) | ($0.74) | ($0.69) | ($0.52) | ($1.24) | ($1.86) | ($6.51) |
Net loss per common share: Diluted (in dollars per share) | ($0.81) | ($1.09) | ($0.74) | ($0.69) | ($0.52) | ($1.24) | ($1.86) | ($6.51) |
|
Shares used in calculation of net loss per common share, basic (in shares) | 114.7 | 90.1 | 71.1 | 58.0 | 56.1 | 36.4 | 27.9 | 18.8 |
Shares used in calculation of net loss per common share, diluted (in shares) | 114.7 | 90.1 | 71.1 | 58.0 | 56.1 | 36.4 | 27.9 | 18.8 |