Note 3 - Employee Stock Compensation Plans (Details) - Exercise Price for Options Outstanding (USD $)	6 Months Ended
	Dec. 31, 2013	Jun. 30, 2013
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, Lower Limit	$ 0.50
Range of Exercise Prices, Upper Limit	$ 1.71
Options Outstanding (in Shares)	3,759,615	3,488,629
Weighted Average Exercise Prices of Options Outstanding	$ 0.82	$ 0.77
Weighted Average Remaining Contractual Life of Options Outstanding (years)	7 years 109 days
Options Exercisable (in Shares)	1,587,884
Weighted Average Exercise Prices of Options Exercisable	$ 0.81
Weighted Average Remaining Contractual Life of Options Exercisable (years)	5 years 6 months
Price Range $0.50 to 0.50 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, Lower Limit	$ 0.50
Range of Exercise Prices, Upper Limit	$ 0.50
Options Outstanding (in Shares)	100,000
Weighted Average Exercise Prices of Options Outstanding	$ 0.50
Weighted Average Remaining Contractual Life of Options Outstanding (years)	1 year 146 days
Options Exercisable (in Shares)	100,000
Weighted Average Exercise Prices of Options Exercisable	$ 0.50
Weighted Average Remaining Contractual Life of Options Exercisable (years)	1 year 146 days
Price Range $0.51 to 0.75 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, Lower Limit	$ 0.51
Range of Exercise Prices, Upper Limit	$ 0.75
Options Outstanding (in Shares)	1,552,945
Weighted Average Exercise Prices of Options Outstanding	$ 0.70
Weighted Average Remaining Contractual Life of Options Outstanding (years)	7 years 73 days
Options Exercisable (in Shares)	794,860
Weighted Average Exercise Prices of Options Exercisable	$ 0.69
Weighted Average Remaining Contractual Life of Options Exercisable (years)	7 years
Price Range $.76 to 1.00 [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	$ 1.00
Options Outstanding (in Shares)	1,868,170
Weighted Average Exercise Prices of Options Outstanding	$ 0.89
Weighted Average Remaining Contractual Life of Options Outstanding (years)	8 years 109 days
Options Exercisable (in Shares)	454,521
Weighted Average Exercise Prices of Options Exercisable	$ 0.83
Weighted Average Remaining Contractual Life of Options Exercisable (years)	5 years 219 days
Price Range $1.01 to 1.71 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, Lower Limit	$ 1.01
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 (years)	2 years 36 days
Options Exercisable (in Shares)	238,503
Weighted Average Exercise Prices of Options Exercisable	$ 1.29
Weighted Average Remaining Contractual Life of Options Exercisable (years)	2 years 36 days