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Note 2 - Revenue - Summary of Revenues (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Revenues	$ 49,923	$ 19,059
Product [Member]
Revenues	49,546	17,871
Product [Member] | ORLADEYO [Member]
Revenues	49,386	10,938
Product [Member] | RAPIVAB [Member]
Revenues	160	113
Product [Member] | PERAMIVIR [Member]
Revenues	0	6,820
Royalty [Member]
Revenues	347	(897)
Collaborative and Other Research and Development [Member]
Revenues	30	2,085
Collaborative and Other Research and Development [Member] | US Department of Health and Human Services [Member]
Revenues	$ 30	$ 2,085

X

- Definition

Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Reference 6: http://www.xbrl.org/2003/role/disclosureRef
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Reference 7: http://www.xbrl.org/2003/role/disclosureRef
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