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6. Earnings Per Share (Details) - USD ($)
 3 Months Ended 6 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Earnings Per Share [Abstract]        
Net income attributable to parent company $ 525,338 $ 617,219 $ 787,879 $ 635,166
Weighted-average shares of common stock outstanding:        
Basic shares outstanding 10,495,994 10,511,012 10,483,870 10,522,503
Dilutive effect of common stock equivalents arising from stock options 258,579 167,027 258,579 167,027
Diluted shares outstanding 10,754,573 10,678,039 10,742,449 10,689,530
Basic earnings per share $ .05 $ .06 $ .08 $ .06
Diluted earnings per share $ .05 $ .06 $ .07 $ .06