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Loans and Allowance for Loan Losses - Association's Loan Portfolio Aging Analysis (Detail) - USD ($) $ in Thousands | Jun. 30, 2021 | Jun. 30, 2020
--- | --- | ---
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total Past Due | $ 680 | $ 2,226
Current | 519,846 | 513,661
Total loans | 520,526 | 515,887
Total Loans 90 Days Past Due & Accruing | 118 | 304
Commercial [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total Past Due | 86 | 267
Current | 155,798 | 144,846
Total loans | 155,884 | 145,113
Commercial [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total Past Due | 9 | 248
Current | 103,079 | 107,333
Total loans | 103,088 | 107,581
Consumer [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total Past Due | 6 | 67
Current | 7,647 | 7,462
Total loans | 7,653 | 7,529
Total Loans 90 Days Past Due & Accruing |  | 0
One- to four-family [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total Past Due | 524 | 1,644
Current | 116,911 | 127,232
Total loans | 117,435 | 128,876
Total Loans 90 Days Past Due & Accruing | 118 | 304
Multi-family [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Current | 104,433 | 96,195
Total loans | 104,433 | 96,195
Home equity lines of credit [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total Past Due | 55 |
Current | 6,633 | 8,551
Total loans | 6,688 | 8,551
Construction [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Current | 25,345 | 22,042
Total loans | 25,345 | 22,042
Financing Receivables, 30 to 59 Days Past Due [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total Past Due | 476 | 1,230
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total Past Due | 86 | 172
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total Past Due | 9 |
Financing Receivables, 30 to 59 Days Past Due [Member] | Consumer [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total Past Due | 6 | 24
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 | 320 | 1,034
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 | 55 |
Financing Receivables, 60 to 89 Days Past Due [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total Past Due | 52 | 367
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total Past Due | 0 | 95
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total Past Due |  | 4
Financing Receivables, 60 to 89 Days Past Due [Member] | Consumer [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total Past Due |  | 43
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 | 52 | 225
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 |  | 0
Financing Receivables, 90 Days or Greater [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total Past Due | 152 | 629
Financing Receivables, 90 Days or Greater [Member] | Commercial [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total Past Due |  | 244
Financing Receivables, 90 Days or Greater [Member] | One- to four-family [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total Past Due | $ 152 | $ 385

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