Note 5 - Option Activity For Stock Option Plans (Details) - Employee Stock Option [Member]	6 Months Ended
	Dec. 31, 2015 $ / shares shares
Outstanding at, (in shares) | shares	2,952,062
Outstanding at, (in dollars per share) | $ / shares	$ 1.28
Granted (in shares) | shares	745,500
Granted (in dollars per share) | $ / shares	$ 0.63
Forfeited (in shares) | shares	(657,062)
Forfeited (in dollars per share) | $ / shares	$ 1.43
Expired (in shares) | shares	(103,750)
Expired (in dollars per share) | $ / shares	$ 2.05
Outstanding at, (in shares) | shares	2,936,750
Outstanding at, (in dollars per share) | $ / shares	$ 1.05
Outstanding at,	5 years 182 days
Vested and Expected to Vest at December 31, 2015 (in shares) | shares	2,510,927
Vested and Expected to Vest at December 31, 2015 (in dollars per share) | $ / shares	$ 1.06
Vested and Expected to Vest at December 31, 2015	5 years 146 days
Exercisable at December 31, 2015 (in shares) | shares	1,364,690
Exercisable at December 31, 2015 (in dollars per share) | $ / shares	$ 1.19
Exercisable at December 31, 2015	4 years 255 days