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Disclosures about Fair Value of Assets - Fair Value Measurements of Assets Recognized on Recurring Basis (Detail) - USD ($) $ in Thousands	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2020
Available-for-sale securities:
Available-for-sale securities, Fair Value	$ 220,906	$ 189,891
Mortgage servicing rights	1,463	1,013	$ 715
US Treasury [Member]
Available-for-sale securities:
Available-for-sale securities, Fair Value	3,400	996
US Government and Federal Agency [Member]
Available-for-sale securities:
Available-for-sale securities, Fair Value	9,121	8,039
Mortgage-backed Securities - GSE Residential [Member]
Available-for-sale securities:
Available-for-sale securities, Fair Value	188,185	170,415
Small Business Administration [Member]
Available-for-sale securities:
Available-for-sale securities, Fair Value	16,442	9,190
State and Political Subdivisions [Member]
Available-for-sale securities:
Available-for-sale securities, Fair Value	3,758	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	3,400	996
Significant Other Observable Inputs (Level 2) [Member] | US Government and Federal Agency [Member]
Available-for-sale securities:
Available-for-sale securities, Fair Value	9,121	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	188,185	170,415
Significant Other Observable Inputs (Level 2) [Member] | Small Business Administration [Member]
Available-for-sale securities:
Available-for-sale securities, Fair Value	16,442	9,190
Significant Other Observable Inputs (Level 2) [Member] | State and Political Subdivisions [Member]
Available-for-sale securities:
Available-for-sale securities, Fair Value	1,096	1,251
Significant Unobservable Inputs (Level 3) [Member]
Available-for-sale securities:
Mortgage servicing rights	1,463	$ 1,013
Significant Unobservable Inputs (Level 3) [Member] | State and Political Subdivisions [Member]
Available-for-sale securities:
Available-for-sale securities, Fair Value	$ 2,662

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Fair value assets measured on recurring basis.

+ References

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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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-Name Accounting Standards Codification
-Topic 320
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-Section 50
-Paragraph 2
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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
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-Name Accounting Standards Codification
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-Section 45
-Paragraph 2
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-URI https://asc.fasb.org/extlink&oid=6469459&loc=d3e122501-111745

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