Note 15 - Licenses, Royalty, Collaborative and Contractual Arrangements (Details Textual) - USD ($)			12 Months Ended
	Jul. 05, 2016	Apr. 22, 2016	Jun. 30, 2016
United States, Europe, Japan, And Other Countries [Member] | GSK [Member]
Royalty Payment Percentage			7.00%
Australia, New Zealand, South Africa, and Indonesia [Member] | GSK [Member]
Royalty Payment Percentage			10.00%
UNITED STATES | GSK [Member] | Relenza [Member]
Royalty Payment, Number of Years Eligible to Receive Royalties from Net Sales of Product or Service			17 years
Japan [Member] | Daiichi Sankyo [Member]
Royalty Payment Percentage			4.00%
HealthCare Royalty Partners III, L.P. [Member]
Proceeds From Sale of Royalty Rights, Gross		$ 20,000,000
Georgia State University Research Foundation (GSURF) [Member] | Subsequent Event [Member]
Collaborative Arrangement, Annual Minimum Payment	$ 10,000
Collaborative Agreement, Number of Years of Sponsored Research Agreement	2 years