Overview Financials News + Filings Key Docs Charts Ownership Insiders
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| 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 |
| Assets |
| Cash and equivalents | 51.8 | 90.7 | 325.5 | 26.1 | 16.1 | 11.4 | 9.7 | 15.4 |
| Short-term investments | 386.2 | 427.3 | 307.8 | 210.8 | 162.9 | 81.7 | 58.1 | 70.3 |
| Accounts receivable, net | | | | | 0.2 | 0.2 | 0.3 | 0.4 |
| Other current assets | 8.4 | 4.3 | 4.0 | 2.7 | 2.0 | 1.3 | 0.7 | 0.7 |
| Total current assets | 446.4 | 522.3 | 637.3 | 239.6 | 181.2 | 94.6 | 68.8 | 86.9 |
| Property, plant, and equipment, net | 2.5 | 2.7 | 2.0 | 0.0 | | 0.0 | 0.0 | 0.1 |
| Other fixed assets | 3.3 | 3.3 | 1.4 | 2.1 | 1.2 | 1.2 | 1.0 | 0.3 |
| Total assets | 456.3 | 534.1 | 647.2 | 242.0 | 182.4 | 95.9 | 69.8 | 87.3 |
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| Accounts payable | 1.5 | 3.2 | 2.8 | 3.5 | 3.9 | 1.2 | 0.6 | 0.9 |
| Accrued expenses | 10.3 | 7.9 | 7.0 | 3.7 | 3.4 | 2.3 | 1.9 | 1.3 |
| Current portion of long-term debt | 0.0 | 0.0 | 0.0 | 0.3 | 0.0 | 1.5 | 0.0 | 0.0 |
| Current portion of long-term debt | | | | 0.3 | | 1.5 | | |
| Other current liabilities | 12.2 | 11.3 | 16.3 | 8.1 | 6.2 | 4.9 | 2.9 | 2.9 |
| Total current liabilities | 24.1 | 22.5 | 26.0 | 15.6 | 13.6 | 10.0 | 5.5 | 5.1 |
| Long-term debt | | | | 7.3 | 7.5 | 5.6 | 7.3 | |
| Other liabilities | 12.0 | 5.0 | 10.3 | 0.4 | 0.3 | 0.4 | 0.2 | 0.1 |
| Total liabilities | 36.0 | 27.4 | 36.3 | 23.2 | 21.4 | 16.0 | 12.9 | 5.2 |
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| Shareholders' equity [+] | 420.3 | 506.6 | 610.9 | 218.8 | 161.0 | 79.9 | 56.9 | 82.1 |
| Paid-in capital | 997.1 | 941.4 | 913.4 | 431.3 | 310.8 | 169.2 | 110.7 | 108.5 |
| Retained earnings | -568.8 | -433.0 | -302.5 | -212.9 | -149.7 | -89.3 | -53.9 | -26.3 |
| Tangible shareholders' equity | 420.3 | 506.6 | 610.9 | 218.8 | 161.0 | 79.9 | 56.9 | 82.1 |
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