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Securities - Amortized Cost and Approximate Fair Value of Securities, Together with Gross Unrealized Gains and Losses of Securities (Detail) - USD ($) $ in Thousands	Dec. 31, 2020	Jun. 30, 2020
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 161,133	$ 155,588
Gross Unrealized Gains	6,691	7,029
Gross Unrealized Losses	(273)	(223)
Fair Value	167,551	162,394
U.S. Government and Federal Agency and Government Sponsored Enterprises (GSEs) [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	7,525	7,528
Gross Unrealized Gains	645	708
Fair Value	8,170	8,236
Mortgage-backed Securities - GSE Residential [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	148,886	143,033
Gross Unrealized Gains	5,908	6,044
Gross Unrealized Losses	(273)	(222)
Fair Value	154,521	148,855
Small Business Administration [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	3,471	3,578
Gross Unrealized Gains	138	62
Fair Value	3,609	3,640
State and Political Subdivisions [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	1,251	1,449
Gross Unrealized Gains		215
Gross Unrealized Losses		(1)
Fair Value	$ 1,251	$ 1,663

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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

Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27161-111563

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- Definition

Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.

+ References

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- Definition

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- Definition

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