Loans and Allowance for Credit Losses - Association's Loan Portfolio Aging Analysis (Detail) - USD ($) $ in Thousands	Mar. 31, 2025	Jun. 30, 2024	Mar. 31, 2024
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	$ 6,374	$ 1,863
Current	638,570	644,526
Total loans	644,944	646,389	$ 650,681
Total Loans > 90 Days & Accruing	319
Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	1,306	150
Current	206,350	199,867
Total loans	207,656	200,017	198,823
Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	3,531	41
Current	90,193	91,743
Total loans	93,724	91,784	89,383
Total Loans > 90 Days & Accruing	27
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	62	51
Current	6,130	7,676
Total loans	6,192	7,727	7,657
One- to four-family [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	1,333	1,201
Current	174,810	176,062
Total loans	176,143	177,263	176,117
Total Loans > 90 Days & Accruing	42
Multi-family [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	142	141
Current	123,860	125,890
Total loans	124,002	126,031	127,757
Total Loans > 90 Days & Accruing	250
Home equity lines of credit [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due		42
Current	10,014	9,817
Total loans	10,014	9,859	9,602
Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due		237
Current	27,213	33,471
Total loans	27,213	33,708	$ 41,342
Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	5,743	1,452
Financing Receivables, 30 to 59 Days Past Due [Member] \| Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	1,056
Financing Receivables, 30 to 59 Days Past Due [Member] \| Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	3,486	21
Financing Receivables, 30 to 59 Days Past Due [Member] \| Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	42	27
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	1,017	1,009
Financing Receivables, 30 to 59 Days Past Due [Member] \| Multi-family [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	142	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	312	238
Financing Receivables, 60 to 89 Days Past Due [Member] \| Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	18	20
Financing Receivables, 60 to 89 Days Past Due [Member] \| Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	20	1
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	274	192
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
Financing Receivables, Greater Than 90 Days [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	319	173
Financing Receivables, Greater Than 90 Days [Member] \| Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	250	150
Financing Receivables, Greater Than 90 Days [Member] \| Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	27
Financing Receivables, Greater Than 90 Days [Member] \| Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due		$ 23
Financing Receivables, Greater Than 90 Days [Member] \| One- to four-family [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	$ 42