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Note 1 - Significant Accounting Policies- Summary of Receivables (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Receivables	$ 2,342	$ 6,117
Billed Revenues [Member]
Receivables	1,225	3,902
Unbilled Revenues [Member]
Receivables	1,117	2,215
US Department of Health and Human Services [Member]
Receivables	1,177	2,062
US Department of Health and Human Services [Member] | Billed Revenues [Member]
Receivables	87	42
US Department of Health and Human Services [Member] | Unbilled Revenues [Member]
Receivables	1,090	2,020
Shionogi and Co. Ltd [Member]
Receivables	27	1,600
Shionogi and Co. Ltd [Member] | Billed Revenues [Member]
Receivables	27	1,600
Shionogi and Co. Ltd [Member] | Unbilled Revenues [Member]
Receivables
Green Cross Corporation [Member]
Receivables	78	1,416
Green Cross Corporation [Member] | Billed Revenues [Member]
Receivables	51	1,388
Green Cross Corporation [Member] | Unbilled Revenues [Member]
Receivables	27	28
Mundipharma International Holdings Limited [Member]
Receivables	43	47
Mundipharma International Holdings Limited [Member] | Billed Revenues [Member]
Receivables	43	47
Mundipharma International Holdings Limited [Member] | Unbilled Revenues [Member]
Receivables
Seqirus UK Limited [Member]
Receivables	1,017	992
Seqirus UK Limited [Member] | Billed Revenues [Member]
Receivables	1,017	825
Seqirus UK Limited [Member] | Unbilled Revenues [Member]
Receivables		$ 167

X

- Definition

The total amount due to the entity within one year of the balance sheet date (or one operating cycle, if longer) from outside sources, including trade accounts receivable, notes and loans receivable, as well as any other types of receivables, net of allowances established for the purpose of reducing such receivables to an amount that approximates their net realizable value.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(5))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(3))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 210
-Section S99
-Paragraph 3
-Subparagraph (SX 210.6-06(3))
-URI http://asc.fasb.org/extlink&oid=6488278&loc=d3e604059-122996

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(4))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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