Note 8 - Common Stock - Activity of Stock Option Plan (Details) - Jun. 30, 2015 - $ / shares	Total
Number of Shares (in shares)	1,183,100
Weighted Average Exercise Price (in dollars per share)	$ 3.50
Granted (in shares)	26,400
Weighted average exercise price, Granted (in dollars per share)	$ 0.15
Forfeited or expired (in shares)	(32,000)
Weighted average exercise price, Forfeited or expired (in dollars per share)	$ 0.94
Number of Shares (in shares)	1,177,500
Weighted Average Exercise Price (in dollars per share)	$ 3.49
Exercisable at June 30, 2015 (in shares)	756,094
Exercisable at June 30, 2015 (in dollars per share)	$ 5.25