Loans and Allowance for Credit Losses - Association's Loan Portfolio Aging Analysis (Detail) - USD ($) $ in Thousands	Jun. 30, 2024	Jun. 30, 2023
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	$ 1,863	$ 981
Current	644,526	593,343
Total loans	646,389	594,324
Total Loans 90 Days Past Due & Accruing	23
Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	150	153
Current	199,867	193,554
Total loans	200,017	193,707
Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	41	114
Current	91,743	79,579
Total loans	91,784	79,693
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	51	55
Current	7,676	8,327
Total loans	7,727	8,382
Total Loans 90 Days Past Due & Accruing	23
One- to four-family [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	1,201	639
Current	176,062	163,215
Total loans	177,263	163,854
Multi-family [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	141
Current	125,890	89,649
Total loans	126,031	89,649
Home equity lines of credit [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	42	20
Current	9,817	8,046
Total loans	9,859	8,066
Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	237
Current	33,471	50,973
Total loans	33,708	50,973
Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	1,452	779
Financing Receivables, 30 to 59 Days Past Due [Member] \| Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due		153
Financing Receivables, 30 to 59 Days Past Due [Member] \| Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	21	56
Financing Receivables, 30 to 59 Days Past Due [Member] \| Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	27	47
Financing Receivables, 30 to 59 Days Past Due [Member] \| One- to four-family [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	1,009	523
Financing Receivables, 30 to 59 Days Past Due [Member] \| Multi-family [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	141
Financing Receivables, 30 to 59 Days Past Due [Member] \| Home equity lines of credit [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	17
Financing Receivables, 30 to 59 Days Past Due [Member] \| Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	237
Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	238	142
Financing Receivables, 60 to 89 Days Past Due [Member] \| Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	20
Financing Receivables, 60 to 89 Days Past Due [Member] \| Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	1	6
Financing Receivables, 60 to 89 Days Past Due [Member] \| One- to four-family [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	192	116
Financing Receivables, 60 to 89 Days Past Due [Member] \| Home equity lines of credit [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	25	20
Financing Receivables, 90 Days or Greater [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	173	60
Financing Receivables, 90 Days or Greater [Member] \| Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	150
Financing Receivables, 90 Days or Greater [Member] \| Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due		58
Financing Receivables, 90 Days or Greater [Member] \| Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	$ 23	$ 2