6. Earnings Per Share (Details) - USD ($)	3 Months Ended		9 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016
Earnings Per Share [Abstract]
Net income attributable to parent company	$ 73,478	$ 391,370	$ 861,357	$ 1,026,536
Weighted-average shares of common stock outstanding:
Basic shares outstanding	10,519,394	10,414,536	10,495,573	10,486,606
Dilutive effect of common stock equivalents arising from stock options	265,885	215,917	265,885	215,917
Diluted shares outstanding	10,785,279	10,630,453	10,761,458	10,702,523
Basic earnings per share	$ .01	$ .04	$ .08	$ .10
Diluted earnings per share	$ .01	$ .04	$ .08	$ .10