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Income Taxes - Temporary Differences Related to Deferred Taxes (Detail) - USD ($) $ in Thousands | Jun. 30, 2021 | Jun. 30, 2020
--- | --- | ---
Deferred tax assets |  |
Allowance for loan losses | $ 1,880 | $ 1,776
Accrued retirement liability | 703 | 677
Deferred compensation | 508 | 468
Deferred loan fees | 336 | 291
Postretirement health plan | 170 | 264
Accrued vacation | 61 | 66
MPF recourse liability | 121 | 97
Deferred revenue Mastercard | 19 | 23
Stock options—Directors | 54 | 50
Restricted stock |  | 11
Accrued professional services | 23 | 18
Other |  | 7
Total deferred tax assets | 3,875 | 3,748
Deferred tax liabilities |  |
Depreciation | (687) | (731)
Mortgage servicing rights | (289) | (204)
Deferred loan expense | (177) | (181)
Unrealized gains on available-for-sale securities | (941) | (1,940)
Restricted stock | (8) |
Prepaid expenses | (76) | (62)
Total deferred tax liabilities | (2,178) | (3,118)
Net deferred tax asset | $ 1,697 | $ 630

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