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LEASES - Additional Information (Details)	1 Months Ended	3 Months Ended		6 Months Ended		12 Months Ended
	Mar. 31, 2010 USD ($) location	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Mar. 31, 2021 USD ($)
Operating lease		$ 365,000	$ 330,000	$ 730,000	$ 723,000
ROU lease assets obtained in exchange for operating lease liabilities			$ 5,000,000.0		$ 5,833,000
Number of branches sold | location	2
Deferred gain on sale	$ 2,100,000
Accrued expenses and other liabilities
Deferred gain on sale				$ 297,000		$ 377,000

X

- Definition

Represents the number of branch locations sold during the period.

+ References

No definition available.

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- Definition

Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
-Paragraph 5
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=123391704&loc=SL77918643-209977

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-Publisher FASB
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-Section 50
-Paragraph 4
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-URI http://asc.fasb.org/extlink&oid=123408670&loc=SL77918686-209980

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- Definition

Amount of increase in right-of-use asset obtained in exchange for operating lease liability.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
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- Definition

Amount of gain (loss) on sale and leaseback transaction from transfer of asset accounted for as sale.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 40
-Section 50
-Paragraph 2
-Subparagraph (b)
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