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6. Earnings Per Share (Details) - USD ($)
3 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Earnings Per Share [Abstract]    
Net income attributable to parent company $ 262,541 $ 17,947
Weighted-average shares of common stock outstanding:    
Basic 10,471,818 10,533,869
Dilutive effect of common stock equivalents arising from stock options 258,449 148,542
Diluted shares outstanding 10,730,267 10,682,411
Basic earnings (loss) per share $ .03 $ 0.00
Diluted earnings (loss) per share $ .02 $ 0.00