6. Earnings (Loss) Per Share (Details) - USD ($)	3 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Earnings Per Share [Abstract]
Net income (loss) attributable to parent company	$ 178,734	$ (437,292)
Weighted-average shares of common stock outstanding:
Basic shares outstanding	10,570,203	10,520,203
Dilutive effect of common stock equivalents arising from stock options	111,963	0
Diluted shares outstanding	10,682,166	10,520,203
Basic earnings (loss) per share	$ 0.02	$ (0.04)
Diluted earnings (loss) per share	$ 0.02	$ (0.04)