In millions, except per share items | Jun-30-21 | Mar-31-21 | Dec-31-20 | Sep-30-20 | Jun-30-20 | Jun-05-20 | Mar-31-20 | Mar-05-20 |
| 10-Q | 8-K | 10-K | 10-Q | 10-Q | 8-K | 10-Q | 8-K |
Net sales | 33.3 | 26.5 | 20.2 | 13.1 | 3.7 | | 1.7 | |
Net sales growth | 800.3% | 1459.4% | 1139.0% | 27780.9% | 7772.3% | | 3517.0% | |
Grant and other income | 0.3 | 0.3 | 0.3 | 0.4 | 0.7 | | 1.0 | |
Cost of goods sold | 9.6 | | 9.3 | 5.9 | 3.1 | | 1.8 | |
Gross profit | 22.3 | 17.5 | 11.1 | 7.6 | 1.3 | | 0.9 | |
Gross margin | 66.9% | 65.9% | 55.1% | 58.0% | 35.1% | | 51.1% | |
|
Operating expenses: | | | | | | | | |
Research and development | 18.4 | 18.3 | 20.9 | 28.2 | 39.9 | | 53.9 | |
Selling, general and administrative | 79.5 | 71.2 | 73.7 | 76.4 | 74.8 | | 72.1 | |
Total operating expenses | 97.9 | 89.5 | 94.7 | 104.6 | 114.6 | | 126.1 | |
Loss from operations | -75.6 | -72.0 | -83.5 | -97.0 | -113.3 | | -125.2 | |
Operating margin | -227.0% | -271.7% | -414.4% | -740.3% | -3063.3% | | -7364.5% | |
|
Other income (expense): | | | | | | | | |
Interest and other income | 2.3 | | 3.0 | 1.6 | 2.0 | | 2.6 | |
Interest expense | -10.5 | -11.0 | -10.7 | -7.6 | -8.8 | | -7.6 | |
Change in fair value of warrants | -0.1 | | 0.0 | 0.1 | 0.3 | | 0.3 | |
Total other income (expense) | -4.8 | -5.1 | -7.7 | -5.9 | -6.4 | | -4.7 | |
Net loss before benefit from income taxes | -65.4 | | -91.3 | -102.9 | -119.8 | | -129.9 | |
Benefit from income taxes | | | 0.1 | | -0.1 | | | |
Net loss | -83.8 | -80.4 | -91.1 | -102.4 | -119.2 | | -129.5 | |
|
Other comprehensive income (loss), net of tax: | | | | | | | | |
Unrealized gains (losses) on investments | -0.1 | | | | | | | |
Foreign currency translation adjustments | 0.0 | | 0.0 | 0.0 | 0.0 | | 0.0 | |
Comprehensive loss | -27.5 | | | | -24.0 | | | |
|
Net loss per common share - basic and diluted | ($1.42) | ($1.64) | ($2.23) | ($3.10) | ($3.97) | | ($4.62) | |
|
Weighted average common shares outstanding - basic and diluted | 54.1 | 47.0 | 39.9 | 35.8 | 31.0 | | 28.2 | |