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Disclosures About Fair Value of Assets and Liabilities - Fair Value Measurements of Assets Recognized on Recurring Basis (Detail) - USD ($) $ in Thousands	Mar. 31, 2023	Jun. 30, 2022
Available-for-sale securities:
Available-for-sale securities, Fair Value	$ 207,693	$ 220,906
Mortgage servicing rights	1,472	1,463
U.S. Treasury [Member]
Available-for-sale securities:
Available-for-sale securities, Fair Value	1,442	3,400
US Government and federal agency [Member]
Available-for-sale securities:
Available-for-sale securities, Fair Value	6,539	9,121
Mortgage-backed securities – GSE residential [Member]
Available-for-sale securities:
Available-for-sale securities, Fair Value	180,219	188,185
Small Business Administration [Member]
Available-for-sale securities:
Available-for-sale securities, Fair Value	16,062	16,442
State and Political Subdivisions [Member]
Available-for-sale securities:
Available-for-sale securities, Fair Value	3,431	3,758
Significant Other Observable Inputs (Level 2) [Member]
Available-for-sale securities:
Mortgage servicing rights	0	0
Significant Other Observable Inputs (Level 2) [Member] | U.S. Treasury [Member]
Available-for-sale securities:
Available-for-sale securities, Fair Value	1,442	3,400
Significant Other Observable Inputs (Level 2) [Member] | US Government and federal agency [Member]
Available-for-sale securities:
Available-for-sale securities, Fair Value	6,539	9,121
Significant Other Observable Inputs (Level 2) [Member] | Mortgage-backed securities – GSE residential [Member]
Available-for-sale securities:
Available-for-sale securities, Fair Value	180,219	188,185
Significant Other Observable Inputs (Level 2) [Member] | Small Business Administration [Member]
Available-for-sale securities:
Available-for-sale securities, Fair Value	16,062	16,442
Significant Other Observable Inputs (Level 2) [Member] | State and Political Subdivisions [Member]
Available-for-sale securities:
Available-for-sale securities, Fair Value	1,070	1,096
Significant Unobservable Inputs (Level 3) [Member]
Available-for-sale securities:
Mortgage servicing rights	1,472	1,463
Significant Unobservable Inputs (Level 3) [Member] | State and Political Subdivisions [Member]
Available-for-sale securities:
Available-for-sale securities, Fair Value	$ 2,361	$ 2,662

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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 security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(6))
-URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 30
-Section 45
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 1
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=124260329&loc=d3e26610-111562

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (aa)
-URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563

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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 https://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 https://asc.fasb.org/extlink&oid=6469459&loc=d3e122492-111745

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 50
-Section 50
-Paragraph 3
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-URI https://asc.fasb.org/extlink&oid=128311188&loc=d3e122625-111746

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 50
-Section 45
-Paragraph 2
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=6469459&loc=d3e122501-111745

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