Note 6 - Licences, Royalty Agreements and Collaborative Arrangements (Detail) (USD $)	1 Months Ended	3 Months Ended		6 Months Ended				3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		21 Months Ended
	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 Major Countries GSK	Dec. 31, 2012 Australia, New Zealand, South Africa and Indonesia GSK	Dec. 31, 2012 GSK	Dec. 31, 2011 GSK	Dec. 31, 2012 GSK	Dec. 31, 2011 GSK	Dec. 31, 2012 Daiichi Sankyo	Dec. 31, 2011 Daiichi Sankyo	Dec. 31, 2012 Daiichi Sankyo	Dec. 31, 2011 Daiichi Sankyo	Dec. 31, 2012 BARDA	Dec. 31, 2011 BARDA	Dec. 31, 2012 BARDA	Dec. 31, 2011 BARDA	Dec. 31, 2012 BARDA
Royalty Payment Percentage						7.00%	10.00%							4.00%
Royalty Revenue		$ 1,943,000	$ (1,047,000)	$ 1,927,000	$ 1,460,000			$ 1,000,000	$ (1,600,000)	$ 1,000,000	$ 700,000	$ 900,000	$ 500,000	$ 900,000	$ 700,000
Contracts Revenue	$ 231,200,000															$ 7,900,000	$ 3,100,000	$ 9,200,000	$ 4,500,000	$ 18,400,000
Contract Term																			5 years