Commitments and Contingent Liabilities (Details) - The Bank of Greene County [Member] - USD ($) $ in Thousands	Dec. 31, 2022	Sep. 30, 2022
Commitments [Abstract]
Total commitments	$ 212,828	$ 299,580
Litigation reserved amount	1,150
Unfunded Loan Commitments [Member]
Commitments [Abstract]
Total commitments	118,242	213,420
Unused Lines of Credit [Member]
Commitments [Abstract]
Total commitments	93,697	85,971
Standby Letters of Credit [Member]
Commitments [Abstract]
Total commitments	$ 889	$ 189

Aggregate carrying amount of the estimated litigation liability for known or estimated probable loss from litigation, which may include attorneys' fees and other litigation costs.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=121557415&loc=d3e14326-108349

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.25)
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Name:	us-gaap_LitigationReserve
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant