7. EARNINGS PER SHARE (Details - Earnings per share) - USD ($)	3 Months Ended				6 Months Ended
	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2019	Mar. 31, 2018
Numerator:
Net income (loss)	$ (1,130,905)	$ (530,527)	$ 948,467	$ 46,651	$ (1,661,432)	$ 995,118
Denominator:
Weighted average shares outstanding - basic	9,532,645		9,291,334		9,530,207	9,023,166
Effect of dilutive securities
Assumed exercise of stock options, treasury stock method	0		41,133		0	34,976
Assumed vesting of restricted stock, treasury stock method	0		65,587		0	88,076
Dilutive potential common shares	0		106,720		0	123,052
Weighted average shares outstanding - diluted	9,532,645		9,398,054		9,530,207	9,146,218
Basic (loss) earnings per share	$ (0.12)		$ 0.10		$ (0.17)	$ 0.11
Diluted (loss) earnings per share	$ (0.12)		$ 0.10		$ (0.17)	$ 0.11