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Note 2 - Revenue (Tables) | 12 Months Ended
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Dec. 31, 2021
Notes Tables |
Disaggregation of Revenue [Table Text Block] |
|  | 2021 |  |  | 2020 |  |  | 2019 |
Product sales, net: |  |  |  |  |  |  |  |  |  |  |  |
ORLADEYO |  | $ | 121,865 |  |  | $ | 133 |  |  | $ | − |
RAPIVAB |  |  | 7,231 |  |  |  | 483 |  |  |  | 13,864 |
Peramivir |  |  | 7,254 |  |  |  | 2,685 |  |  |  | 3,669 |
Total product sales, net |  |  | 136,350 |  |  |  | 3,301 |  |  |  | 17,533 |
Royalty revenue |  |  | (100 | ) |  |  | 3,381 |  |  |  | 6,303 |
Milestone revenue |  |  | 15,000 |  |  |  | − |  |  |  | − |
Collaborative and other research and development revenues: |  |  |  |  |  |  |  |  |  |  |  |
U.S. Department of Health and Human Services |  |  | 5,920 |  |  |  | 9,231 |  |  |  | 4,898 |
Torii Pharmaceutical Co., Ltd. |  |  | − |  |  |  | 1,899 |  |  |  | 20,101 |
Total collaborative and other research and development revenues |  |  | 5,920 |  |  |  | 11,130 |  |  |  | 24,999 |
Total revenues |  | $ | 157,170 |  |  | $ | 17,812 |  |  | $ | 48,835 |

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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130545-203045 + Details
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