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Note 4 - Trade Receivables | 12 Months Ended
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Dec. 31, 2021
Notes to Financial Statements |
Trade Receivables [Text Block] | Note 4 – Trade Receivables Product Sales Receivables from product sales are recorded for amounts due to the Company related to sales of ORLADEYO® and RAPIVAB®. At December 31, 2021 and 2020, receivables related to sales of ORLADEYO were $27,384 and $149, respectively. At December 31, 2021 and 2020, receivables related to sales of RAPIVAB were $49 and $254, respectively. No reserve or allowance amounts were recorded as of December 31, 2021 and December 31, 2020, respectively. Collaborations At December 31, 2021 and 2020, the Company had the following receivables from collaborations:
|  | December 31, 2021 |
|  | Billed |  |  | Unbilled |  |  | Total |
U.S. Department of Health and Human Services, net |  | $ | 5 |  |  | $ | 1,670 |  |  | $ | 1,675 |
Royalty receivables from partners |  |  | 305 |  |  |  | − |  |  |  | 305 |
Total receivables from collaborators |  | $ | 310 |  |  | $ | 1,670 |  |  | $ | 1,980 |
|  | December 31, 2020
|  | Billed |  |  | Unbilled |  |  | Total |
U.S. Department of Health and Human Services, net |  | $ | − |  |  | $ | 5,402 |  |  | $ | 5,402 |
Royalty receivables from partners |  |  | 2,816 |  |  |  | 25 |  |  |  | 2,841 |
Total receivables from collaborators |  | $ | 2,816 |  |  | $ | 5,427 |  |  | $ | 8,243 |
As of December 31, 2021, the Company maintained a reserve of $701 related to royalties associated with Green Cross. No reserve was recorded at December 31, 2020.

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