Note 9 - Income Taxes (Details) - Reconciliation of Effective Tax Rate (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Reconciliation of Effective Tax Rate [Abstract]
Income tax expense (benefit) at federal statutory rate	$ (4.0)	$ (3.3)	$ (6.9)
State and local income taxes, net of federal benefit	(0.3)	0.3
Foreign tax rate differential	0.4	1.3	0.9
Change in valuation allowance	4.1	4.2	2.8
Gain on merger	0.1	(3.0)
Research and development expenses	(0.1)	1.1	2.9
Research and development tax credits	(0.3)	(1.1)	(0.3)
Employee stock options		0.5	0.2
Other	(0.2)	0.1	(0.1)
Income tax expense (benefit)	$ (0.3)	$ 0.1	$ (0.5)