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Note 1 - Significant Accounting Policies and Concentration of Risk - Summary of Receivables (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Receivables	$ 8,768	$ 6,243
Billed Revenues [Member]
Receivables	5,094	679
Unbilled Revenues [Member]
Receivables	3,674	5,564
US Department of Health and Human Services [Member]
Receivables	3,495	5,536
US Department of Health and Human Services [Member] | Billed Revenues [Member]
Receivables
US Department of Health and Human Services [Member] | Unbilled Revenues [Member]
Receivables	3,495	5,536
Shionogi and Co. Ltd [Member]
Receivables	3,451	469
Shionogi and Co. Ltd [Member] | Billed Revenues [Member]
Receivables	3,451	469
Shionogi and Co. Ltd [Member] | Unbilled Revenues [Member]
Receivables
Green Cross Corporation [Member]
Receivables	686
Green Cross Corporation [Member] | Billed Revenues [Member]
Receivables	686
Green Cross Corporation [Member] | Unbilled Revenues [Member]
Receivables
Seqirus UK Limited [Member]
Receivables	1,136	238
Seqirus UK Limited [Member] | Billed Revenues [Member]
Receivables	957	210
Seqirus UK Limited [Member] | Unbilled Revenues [Member]
Receivables	$ 179	$ 28

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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