Earnings per share

3 Months Ended

Sep. 30, 2017

Earnings Per Share [Abstract]

Earnings Per Share [Text Block]

3. Earnings per share

Basic earnings per share are based on the weighted average number of shares of all common stock outstanding during the period. Diluted earnings per share are based on the sum of the weighted average number of shares of common stock and common stock equivalents outstanding during the period. The number of basic and diluted shares outstanding for the three months ended September 30, 2017 and 2016 were 4,013,537.