EARNINGS (LOSS) PER SHARE - Summary of amounts used to compute earnings per share (Details ) - USD ($)	3 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Earnings Per Share [Abstract]
Net income	$ 631,384	$ 148,500
Dividends on preferred stock	77,250	77,250
Income available to common shareholders	$ 554,134	$ 71,250
Weighted average shares outstanding (in shares)	14,135,900	14,239,836
Weighted average shares outstanding-diluted (in shares)	17,569,233	17,673,169
Earnings per share available to common shareholders (in dollars per share)	$ 0.039	$ 0.005
Earnings per share available to common shareholders-diluted (in dollars per share)	$ 0.032	$ 0.004