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Note 1 - Significant Accounting Policies - Summary of Receivables (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Receivables	$ 8,985	$ 8,768
Billed Revenues [Member]
Receivables	6,604	5,094
Unbilled Revenues [Member]
Receivables	2,381	3,674
US Department of Health and Human Services [Member]
Receivables	1,969	3,495
US Department of Health and Human Services [Member] | Billed Revenues [Member]
Receivables	63
US Department of Health and Human Services [Member] | Unbilled Revenues [Member]
Receivables	1,906	3,495
Shionogi and Co. Ltd [Member]
Receivables	653	3,451
Shionogi and Co. Ltd [Member] | Billed Revenues [Member]
Receivables	653	3,451
Shionogi and Co. Ltd [Member] | Unbilled Revenues [Member]
Receivables
Green Cross Corporation [Member]
Receivables	48	686
Green Cross Corporation [Member] | Billed Revenues [Member]
Receivables	48	686
Green Cross Corporation [Member] | Unbilled Revenues [Member]
Receivables
Mundipharma International Holdings Limited [Member]
Receivables	46
Mundipharma International Holdings Limited [Member] | Billed Revenues [Member]
Receivables	46
Mundipharma International Holdings Limited [Member] | Unbilled Revenues [Member]
Receivables
Seqirus UK Limited [Member]
Receivables	6,269	1,136
Seqirus UK Limited [Member] | Billed Revenues [Member]
Receivables	5,794	957
Seqirus UK Limited [Member] | Unbilled Revenues [Member]
Receivables	$ 475	$ 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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