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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	Sep. 30, 2020	Jun. 30, 2020
Available-for-sale securities:
Available-for-sale securities, Fair Value	$ 161,292	$ 162,394
Mortgage servicing rights	731	715
U.S. Government and Federal Agency and Government Sponsored Enterprises (GSEs) [Member]
Available-for-sale securities:
Available-for-sale securities, Fair Value	8,235	8,236
Mortgage-backed: GSE Residential [Member]
Available-for-sale securities:
Available-for-sale securities, Fair Value	147,954	148,855
Small Business Administration [Member]
Available-for-sale securities:
Available-for-sale securities, Fair Value	3,654	3,640
State and Political Subdivisions [Member]
Available-for-sale securities:
Available-for-sale securities, Fair Value	1,449	1,663
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	8,235	8,236
Significant Other Observable Inputs (Level 2) [Member] | Mortgage-backed: GSE Residential [Member]
Available-for-sale securities:
Available-for-sale securities, Fair Value	147,954	148,855
Significant Other Observable Inputs (Level 2) [Member] | Small Business Administration [Member]
Available-for-sale securities:
Available-for-sale securities, Fair Value	3,654	3,640
Significant Other Observable Inputs (Level 2) [Member] | State and Political Subdivisions [Member]
Available-for-sale securities:
Available-for-sale securities, Fair Value	1,449	1,663
Significant Unobservable Inputs (Level 3) [Member]
Available-for-sale securities:
Mortgage servicing rights	$ 731	$ 715

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- Definition

Fair value assets measured on recurring basis.

+ References

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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=116651436&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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