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Disclosures about Fair Value of Assets - Fair Value Measurements of Assets Recognized on Recurring Basis (Detail) - USD ($) $ in Thousands	Sep. 30, 2021	Jun. 30, 2021
Available-for-sale securities:
Available-for-sale securities, Fair Value	$ 199,809	$ 189,891
Mortgage servicing rights	1,020	1,013
US Treasury [Member]
Available-for-sale securities:
Available-for-sale securities, Fair Value	995	996
U.S. Government and Federal Agency and Government Sponsored Enterprises (GSEs) [Member]
Available-for-sale securities:
Available-for-sale securities, Fair Value	7,991	8,039
Mortgage-backed Securities - GSE Residential [Member]
Available-for-sale securities:
Available-for-sale securities, Fair Value	178,762	170,415
Small Business Administration [Member]
Available-for-sale securities:
Available-for-sale securities, Fair Value	10,810	9,190
State and Political Subdivisions [Member]
Available-for-sale securities:
Available-for-sale securities, Fair Value	1,251	1,251
Significant Other Observable Inputs (Level 2) [Member]
Available-for-sale securities:
Mortgage servicing rights	0	0
Significant Other Observable Inputs (Level 2) [Member] | US Treasury [Member]
Available-for-sale securities:
Available-for-sale securities, Fair Value	995	996
Significant Other Observable Inputs (Level 2) [Member] | U.S. Government and Federal Agency and Government Sponsored Enterprises (GSEs) [Member]
Available-for-sale securities:
Available-for-sale securities, Fair Value	7,991	8,039
Significant Other Observable Inputs (Level 2) [Member] | Mortgage-backed Securities - GSE Residential [Member]
Available-for-sale securities:
Available-for-sale securities, Fair Value	178,762	170,415
Significant Other Observable Inputs (Level 2) [Member] | Small Business Administration [Member]
Available-for-sale securities:
Available-for-sale securities, Fair Value	10,810	9,190
Significant Other Observable Inputs (Level 2) [Member] | State and Political Subdivisions [Member]
Available-for-sale securities:
Available-for-sale securities, Fair Value	1,251	1,251
Significant Unobservable Inputs (Level 3) [Member]
Available-for-sale securities:
Mortgage servicing rights	$ 1,020	$ 1,013

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- Definition

Fair value assets measured on recurring basis.

+ References

No definition available.

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- Definition

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

+ References

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- Definition

Fair value of an asset representing net future revenue from contractually specified servicing fees, late charges, and other ancillary revenues, in excess of future costs related to servicing arrangements.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 50
-Section 45
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6469459&loc=d3e122501-111745

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 50
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6469459&loc=d3e122492-111745

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 50
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=125521744&loc=d3e122625-111746

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 50
-Section 45
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6469459&loc=d3e122501-111745

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