Note 5 - Licences, Royalty Collaborative and Contractual Arrangements (Details) - Components of Revenues from Royalties, Collaborative and Contractual Agreements (USD $) In Millions, unless otherwise specified	1 Months Ended	3 Months Ended
	Mar. 31, 2011	Sep. 30, 2013	Sep. 30, 2012
Segment Reporting Information [Line Items]
Revenue under other contracts, grants and collaborations	$ 231.2	$ 0.1	$ 0.2
Total revenue		12.3	1.5
BARDA
Segment Reporting Information [Line Items]
Service revenue under BARDA contract		12.2	1.3
Revenue under other contracts, grants and collaborations	$ 231.2