6. Earnings Per Share (Details) - USD ($)	3 Months Ended
Sep. 30, 2017	Sep. 30, 2016
Earnings Per Share [Abstract]
Net income (loss) attributable to parent company	$ (437,292)	$ 262,541
Weighted-average shares of common stock outstanding:
Basic shares outstanding	10,520,203	10,471,818
Dilutive effect of common stock equivalents arising from stock options	0	258,449
Diluted shares outstanding	10,520,203	10,730,267
Basic earnings (loss) per share	$ (0.04)	$ 0.03
Diluted earnings (loss) per share	$ (0.04)	$ 0.02

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of call options and warrants using the treasury stock method.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

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