Consolidated Statements of Stockholders' Equity - USD ($)	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings, Appropriated [Member]	AOCI Attributable to Parent [Member]	Total
Balance (in shares) at Sep. 30, 2017	32,158,436
Balance at Sep. 30, 2017	$ 322	$ 87,956,839	$ (52,771,853)	$ (1,269)	$ 35,184,039
Share-based compensation expense		584,873			$ 584,873
Issuance of common stock upon exercise of stock options, net (in shares)	1,179,456				1,179,456
Issuance of common stock upon exercise of stock options, net	$ 12	2,434,875			$ 2,434,887
Issuance of common stock upon vesting of restricted stock units (in shares)	125,000
Issuance of common stock upon vesting of restricted stock units	$ 1				1
Stock buyback (in shares)	(286,746)
Stock buyback	$ (3)	(725,442)			(725,445)
Other comprehensive loss				(244,106)	(244,106)
Net income			(3,745,042)		(3,745,042)
Balance (in shares) at Sep. 30, 2018	33,176,146
Balance at Sep. 30, 2018	$ 332	90,251,145	(56,516,895)	(245,375)	33,489,207
Share-based compensation expense		735,003			$ 735,003
Issuance of common stock upon exercise of stock options, net (in shares)	406,151				406,151
Issuance of common stock upon exercise of stock options, net	$ 4	756,509			$ 756,513
Issuance of common stock upon vesting of restricted stock units (in shares)	156,115
Issuance of common stock upon vesting of restricted stock units	$ 2	(2)
Stock buyback (in shares)	(788,425)
Stock buyback	$ (8)	(2,171,014)			(2,171,022)
Other comprehensive loss				(213,344)	(213,344)
Net income			2,784,992		2,784,992
Balance (in shares) at Sep. 30, 2019	32,949,987
Balance at Sep. 30, 2019	$ 330	$ 89,571,641	$ (53,731,903)	$ (458,719)	$ 35,381,349