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Note 3. Net Income per Common Share (Tables)
3 Months Ended
Sep. 30, 2018
Table Text Block Supplement [Abstract]  
Schedule of Dilutive Shares
    2018     2017  
Basic weighted-average number of common shares outstanding during the period     8,160,431       4,748,049  
Weighted-average number of dilutive potential common shares outstanding during the period     240,393       260  
Diluted weighted-average number of common and potential common shares outstanding during the period     8,400,824       4,748,309