Note 4 - Summary of Accrued and Other Current Liabilities (Details) - USD ($) $ in Millions	Mar. 31, 2016	Jun. 30, 2015
Professional fees	$ 0.7	$ 0.8
Salary and benefits	0.6	1.6
Research and development expenses	3.1	1.7
Other accrued expenses	0.1	1.3
Total accrued expenses and other liabilities	$ 4.5	$ 5.4