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Note 1 - Significant Accounting Policies and Concentrations of Risk- Summary of Receivables (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Receivables	$ 6,117	$ 8,768
Billed Revenues [Member]
Receivables	3,902	5,094
Unbilled Revenues [Member]
Receivables	2,215	3,674
US Department of Health and Human Services [Member]
Receivables	2,062	3,495
US Department of Health and Human Services [Member] | Billed Revenues [Member]
Receivables	42
US Department of Health and Human Services [Member] | Unbilled Revenues [Member]
Receivables	2,020	3,495
Shionogi and Co. Ltd [Member]
Receivables	1,600	3,451
Shionogi and Co. Ltd [Member] | Billed Revenues [Member]
Receivables	1,600	3,451
Shionogi and Co. Ltd [Member] | Unbilled Revenues [Member]
Receivables
Green Cross Corporation [Member]
Receivables	1,416	686
Green Cross Corporation [Member] | Billed Revenues [Member]
Receivables	1,388	686
Green Cross Corporation [Member] | Unbilled Revenues [Member]
Receivables	28
Mundipharma International Holdings Limited [Member]
Receivables	47
Mundipharma International Holdings Limited [Member] | Billed Revenues [Member]
Receivables	47
Mundipharma International Holdings Limited [Member] | Unbilled Revenues [Member]
Receivables
Seqirus UK Limited [Member]
Receivables	992	1,136
Seqirus UK Limited [Member] | Billed Revenues [Member]
Receivables	825	957
Seqirus UK Limited [Member] | Unbilled Revenues [Member]
Receivables	$ 167	$ 179

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://www.xbrl.org/2003/role/presentationRef
-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

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-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 3: http://www.xbrl.org/2003/role/presentationRef
-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 4: http://www.xbrl.org/2003/role/presentationRef
-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

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