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Note 2 - Revenue | 12 Months Ended
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Dec. 31, 2021
Notes to Financial Statements |
Revenue from Contract with Customer [Text Block] | Note 2 - Revenue The Company recorded the following revenues for the years ended December 31:
|  | 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 The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -URI http://asc.fasb.org/topic&trid=49130388 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130551-203045 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130556-203045 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 12 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130554-203045 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130550-203045 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 12 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130554-203045 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 12 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130554-203045 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 12 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130554-203045 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130558-203045 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130554-203045 + Details
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