Note 16 - Quarterly Financial Information (Unaudited) (Details) - Consolidated Quarterly Financial Information (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended																12 Months Ended
	Jun. 30, 2014		Mar. 31, 2014		Dec. 31, 2013		Sep. 30, 2013		Jun. 30, 2013		Mar. 31, 2013		Dec. 31, 2012		Sep. 30, 2012		Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Consolidated Quarterly Financial Information [Abstract]
Revenues	$ 8.5		$ 29.5		$ 18.5		$ 12.3		$ 9.3		$ 12.5		$ 10.4		$ 1.4		$ 68.7	$ 33.6	$ 20.4
Operating expenses	19.0		19.3		11.4		10.7		7.7		4.1		7.1		1.5
Net (loss) income	$ (10.2)		$ 3.2		$ (0.1)		$ (3.9)		$ (6.5)		$ 0.2		$ 4.6		$ (7.2)		$ (11.0)	$ (8.9)	$ (19.2)
Net (loss) income per share (1):
Basic (in Dollars per share)	$ (0.29)	[1]	$ 0.09	[1]	$ 0.00	[1]	$ (0.14)	[1]	$ (0.23)	[1]	$ 0.01	[1]	$ 0.16	[1]	$ (0.32)	[1]
Diluted (in Dollars per share)	$ (0.29)	[1]	$ 0.09	[1]	$ 0.00	[1]	$ (0.14)	[1]	$ (0.23)	[1]	$ 0.01	[1]	$ 0.16	[1]	$ (0.32)	[1]

[1] Due to the use of the weighted average shares outstanding for each quarter for computing earnings per share, the sum of the quarterly per share amounts maynot equal the per share amount for the year.