Note 7 - Exercise Price Range Relating to Oustanding and Exercisable Options (Details) (USD $)	6 Months Ended
	Dec. 31, 2014
Range 1 (in shares)	3,293,424
Range 1	8 years 65 days
Range 1 (in dollars per share)	$ 6.43
Range 3 (in shares)	1,132,895
Range 3 (in dollars per share)	$ 12.92
Range 4 [Member]
Range 1 (in dollars per share)	$ 4.07
Range 1 (in dollars per share)	$ 75.81
Range 1 (in shares)	1,538,424
Range 1	6 years 244 days
Range 1 (in dollars per share)	$ 10.69
Range 3 (in shares)	1,046,645
Range 3 (in dollars per share)	$ 13.66
Range One [Member]
Range 1 (in dollars per share)	$ 2.20
Range 1 (in dollars per share)	$ 2.30
Range 1 (in shares)	115,000
Range 1	9 years 251 days
Range 1 (in dollars per share)	$ 2.29
Range Three [Member]
Range 1 (in dollars per share)	$ 2.47
Range 1 (in dollars per share)	$ 4.05
Range 1 (in shares)	605,000
Range 1	9 years 25 days
Range 1 (in dollars per share)	$ 3.18
Range 3 (in shares)	86,250
Range 3 (in dollars per share)	$ 3.96
Range Two [Member]
Range 1 (in dollars per share)	$ 2.45
Range 1 (in shares)	1,035,000
Range 1	9 years 273 days
Range 1 (in dollars per share)	$ 2.45