Note 3 - Basic and Diluted Net Income Per Share - Basic and Diluted Earnings Per Share (Details) - USD ($)	3 Months Ended		6 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016
Net income (loss) available to common shareholders, basic	$ (22,103)	$ 1,016,446	$ 849,601	$ 2,326,940
Shares, basic (in shares)	29,559,139	29,559,139	29,559,139	29,559,139
Basic income (loss) per share (in dollars per share)	$ 0	$ 0.03	$ 0.03	$ 0.08
Effect of dilutive securities, shares (in shares)		8,739,020	8,739,020	8,739,020
Effect of dilutive securities, per share (in dollars per share)
Net Income (loss) available to common shareholders, diluted	$ (22,103)	$ 1,016,446	$ 849,601	$ 2,326,940
Shares, diltued (in shares)	29,559,139	38,298,159	38,298,159	38,298,159
Diluted income (loss) per share (in dollars per share)	$ 0	$ 0.03	$ 0.02	$ 0.06