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Note 1 - Significant Accounting Policies and Concentrations of Risk - Summary of Receivables (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Receivables | $ 22,146 | $ 4,293
Billed Revenues [Member] |  |
Receivables | 6,760 | 2,714
Unbilled Revenues [Member] |  |
Receivables | 15,386 | 1,579
US Department of Health and Human Services [Member] |  |
Receivables | 16,376 | 1,525
US Department of Health and Human Services [Member] | Billed Revenues [Member] |  |
Receivables | 1,353 |
US Department of Health and Human Services [Member] | Unbilled Revenues [Member] |  |
Receivables | 15,023 | 1,525
Shionogi and Co. Ltd [Member] |  |
Receivables | 1,340 | 854
Shionogi and Co. Ltd [Member] | Billed Revenues [Member] |  |
Receivables | 1,336 | 854
Shionogi and Co. Ltd [Member] | Unbilled Revenues [Member] |  |
Receivables | 4 |
Green Cross Corporation [Member] |  |
Receivables | 2,932 | 904
Green Cross Corporation [Member] | Billed Revenues [Member] |  |
Receivables | 2,924 | 876
Green Cross Corporation [Member] | Unbilled Revenues [Member] |  |
Receivables | 8 | 28
Mundipharma International Holdings Limited [Member] |  |
Receivables | 56 | 44
Mundipharma International Holdings Limited [Member] | Billed Revenues [Member] |  |
Receivables | 56 | 44
Mundipharma International Holdings Limited [Member] | Unbilled Revenues [Member] |  |
Receivables |  |
Seqirus UK Limited [Member] |  |
Receivables | 1,442 | 966
Seqirus UK Limited [Member] | Billed Revenues [Member] |  |
Receivables | 1,091 | 940
Seqirus UK Limited [Member] | Unbilled Revenues [Member] |  |
Receivables | $ 351 | $ 26

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