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Loans and Allowance for Loan Losses - Credit Risk Profile of Association's Loan Portfolio Based on Rating Category and Payment Activity (Detail) - USD ($) $ in Thousands	Jun. 30, 2020	Jun. 30, 2019
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 515,887	$ 493,753
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	510,504	488,010
Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	3,633	2,415
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,506	3,318
Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	244	10
One- to four-family [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	128,876	129,290
One- to four-family [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	127,279	127,386
One- to four-family [Member] | Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	775
One- to four-family [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	822	1,904
Multi-family [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	96,195	104,663
Multi-family [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	95,925	104,504
Multi-family [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	270	159
Home equity lines of credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	8,551	8,938
Home equity lines of credit [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	8,402	8,918
Home equity lines of credit [Member] | Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	134
Home equity lines of credit [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	15	20
Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	22,042	16,113
Construction [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	22,042	16,113
Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	145,113	143,367
Commercial [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	143,727	142,076
Commercial [Member] | Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,073	1,040
Commercial [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	313	251
Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	107,581	84,246
Commercial [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	105,605	81,906
Commercial [Member] | Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,651	1,375
Commercial [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	81	965
Commercial [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	244
Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	7,529	7,136
Consumer [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	7,524	7,107
Consumer [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 5	19
Consumer [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans		$ 10

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- Definition

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+ References

No definition available.

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- Definition

Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=118952595&loc=d3e4428-111522

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