EARNINGS PER SHARE: (Details) - USD ($)	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
EARNINGS PER SHARE
Anti-dilutive awards excluded from the computation of diluted earnings per share (in shares)	0	0
Weighted average common shares outstanding, Basic	619,295	610,392
Weighted average of net additional shares outstanding assuming dilutive options exercised and proceeds used to purchase treasury stock and conversion of preferred stock	120,938	124,835
Weighted average number of shares outstanding, Diluted	740,233	735,227
Net income	$ 6,361,278	$ 4,959,528
Deduct: convertible preferred stock dividends	(195,105)	(195,105)
Net income available to common shareholders	6,166,173	4,764,423
Net income available to common shareholders, diluted	$ 6,361,278	$ 4,959,528
Net earnings per share available to common shareholders, Basic (in dollars per share)	$ 9.96	$ 7.81
Net earnings per share available to common shareholders, Diluted (in dollars per share)	$ 8.59	$ 6.75