Loans and Allowance for Credit Losses - Association's Loan Portfolio Aging Analysis (Detail) - USD ($) $ in Thousands	Dec. 31, 2024	Jun. 30, 2024	Dec. 31, 2023
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	$ 2,600	$ 1,863
Current	652,033	644,526
Total loans	654,633	646,389	$ 661,147
Total Loans > 90 Days & Accruing	52
Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	676	150
Current	204,672	199,867
Total loans	205,348	200,017	215,565
Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	101	41
Current	93,941	91,743
Total loans	94,042	91,784	83,698
Total Loans > 90 Days & Accruing	52
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	54	51
Current	6,872	7,676
Total loans	6,926	7,727	8,042
One- to four-family [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	1,626	1,201
Current	176,107	176,062
Total loans	177,733	177,263	175,817
Multi-family [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	143	141
Current	129,228	125,890
Total loans	129,371	126,031	128,625
Home equity lines of credit [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due		42
Current	9,887	9,817
Total loans	9,887	9,859	9,494
Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due		237
Current	31,326	33,471
Total loans	31,326	33,708	$ 39,906
Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	2,082	1,452
Financing Receivables, 30 to 59 Days Past Due [Member] \| Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	676
Financing Receivables, 30 to 59 Days Past Due [Member] \| Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due		21
Financing Receivables, 30 to 59 Days Past Due [Member] \| Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	34	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	1,347	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	25	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	429	238
Financing Receivables, 60 to 89 Days Past Due [Member] \| Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	49	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	242	192
Financing Receivables, 60 to 89 Days Past Due [Member] \| Multi-family [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	118
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	89	173
Financing Receivables, Greater Than 90 Days [Member] \| Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due		150
Financing Receivables, Greater Than 90 Days [Member] \| Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	52
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	$ 37