Loans and Allowance for Loan Losses - Non Accruals 1 (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Jun. 30, 2020
Real estate loans
Total	$ 1,298	$ 1,330
One- to four-family [Member]
Real estate loans
Total	1,243	1,256
Home equity lines of credit [Member]
Real estate loans
Total		15
Real Estate Loan [Member]
Real estate loans
Total	1,243	1,271
Commercial Business Loans [Member]
Real estate loans
Total	$ 55	$ 59

Amount of financing receivable modified as troubled debt restructuring.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953676-111524

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 40
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=121585226&loc=d3e18845-111554

Name:	us-gaap_FinancingReceivableModificationsRecordedInvestment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant