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STOCK-BASED COMPENSATION AND STOCK REPURCHASE PROGRAM (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended		167 Months Ended
	Jul. 14, 2021	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Oct. 08, 2021
Stock option expenses		$ 0	$ 0
Stock award expenses		0	0
Cost of shares repurchased by ESOP trust	$ 3,200	$ 2,300
Average cost of shares repurchased (per share)	$ 10.75	$ 10.58
Description of loan with respect to employee stock ownership plan		The Company’s ESOP (“2006 ESOP”) was established in 2006 as part of the Company’s initial public offering. The total cost of shares purchased by the 2006 ESOP trust was $2.3 million, reflecting an average cost per share of $10.58. The loan bore a variable interest rate that adjusted annually to Prime Rate (3.25% at January 1, 2021) with principal and interest payable annually in equal installments over thirty years. The 2006 ESOP loan was fully repaid during the year ended September 30, 2021.
Interest rate of loan with respect to employee stock ownership plan		3.25%		3.25%
Fair value of unreleased shares		$ 3,500		$ 3,500
ESOP compensation expense		$ 107	$ 126
Total ESOP shares	304,377	522,240		522,240
Number of ESOP shares intended to by purchased by Trustees in connection with the second-step conversion offerring		312,800		312,800
Percentage of common shares sold		8.00%
Subsequent Event [Member]
Remaining shares available to be repurchased					8,423
Interest rate of loan with respect to employee stock ownership plan					3.25%
First Repurchase Program [Member]
Stock repurchased during period (in shares)				130,927
Second Repurchase Program [Member]
Maximum stock repurchase authorization (as a percent)				5.00%
Stock authorized to be repurchased (in shares)		129,924		129,924
Stock repurchased during period (in shares)			10,000	91,000
Common stock average cost (in dollars per share)			$ 9.03	$ 8.41

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