Note 8 - Director and Employee Stock Compensation Plans (Details) - Exercise Price for Options Outstanding (USD $)	12 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, Lower Limit	$ 0.30
Range of Exercise Prices, Upper Limit	$ 1.71
Options Outstanding (in Shares)	3,488,629	3,481,900
Weighted Average Exercise Prices of Options Outstanding	$ 0.77	$ 0.76
Options Exercisable (in Shares)	1,900,252
Weighted Average Exercise Prices of Options Exercisable	$ 0.78
Weighted Average Remaining Contractual Life of Options Exercisable	6 years 36 days
Price Range $0.30 to 0.50 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, Lower Limit	$ 0.30
Range of Exercise Prices, Upper Limit	$ 0.50
Options Outstanding (in Shares)	158,852
Weighted Average Exercise Prices of Options Outstanding	$ 0.43
Weighted Average Remaining Contractual Life of Options Outstanding	1 year 109 days
Options Exercisable (in Shares)	158,852
Weighted Average Exercise Prices of Options Exercisable	$ 0.43
Weighted Average Remaining Contractual Life of Options Exercisable	1 year 109 days
Price Range $0.60 to 0.75 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, Lower Limit	$ 0.60
Range of Exercise Prices, Upper Limit	$ 0.75
Options Outstanding (in Shares)	1,883,920
Weighted Average Exercise Prices of Options Outstanding	$ 0.70
Weighted Average Remaining Contractual Life of Options Outstanding	7 years 255 days
Options Exercisable (in Shares)	986,560
Weighted Average Exercise Prices of Options Exercisable	$ 0.69
Weighted Average Remaining Contractual Life of Options Exercisable	7 years 219 days
Price Range $0.76 to 0.94 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, Lower Limit	$ 0.76
Range of Exercise Prices, Upper Limit	$ 0.94
Options Outstanding (in Shares)	1,207,357
Weighted Average Exercise Prices of Options Outstanding	$ 0.81
Weighted Average Remaining Contractual Life of Options Outstanding	7 years 292 days
Options Exercisable (in Shares)	516,340
Weighted Average Exercise Prices of Options Exercisable	$ 0.83
Weighted Average Remaining Contractual Life of Options Exercisable	6 years 73 days
Price Range $1.05 to 1.71 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, Lower Limit	$ 1.05
Range of Exercise Prices, Upper Limit	$ 1.71
Options Outstanding (in Shares)	238,500
Weighted Average Exercise Prices of Options Outstanding	$ 1.29
Weighted Average Remaining Contractual Life of Options Outstanding	2 years 219 days
Options Exercisable (in Shares)	238,500
Weighted Average Exercise Prices of Options Exercisable	$ 1.29
Weighted Average Remaining Contractual Life of Options Exercisable	2 years 219 days