6. Earnings (Loss) Per Share (Details) - USD ($)	3 Months Ended				6 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018	Dec. 31, 2019	Dec. 31, 2018
Earnings Per Share [Abstract]
Net income attributable to parent company	$ 580,878	$ 253,938	$ (515,379)	$ 178,734	$ 834,816	$ (336,645)
Weighted-average shares of common stock outstanding:
Basic shares outstanding	10,570,203		10,570,203		10,570,203	10,570,203
Dilutive effect of common stock equivalents arising from stock options	137,825		0		137,825	0
Diluted shares outstanding	10,708,028		10,570,203		10,708,028	10,570,203
Basic income (loss) per share	$ 0.05		$ (0.05)		$ 0.08	$ (0.03)
Diluted income (loss) per share	$ 0.05		$ (0.05)		$ 0.08	$ (0.03)