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Disclosures about Fair Value of Assets and Liabilities - Fair Value Measurements of Assets Recognized on Recurring Basis (Detail) - USD ($) $ in Thousands | Mar. 31, 2020 | Jun. 30, 2019
--- | --- | ---
Available-for-sale securities: |  |
Available-for-sale securities, Fair Value | $ 152,948 | $ 146,291
Mortgage servicing rights | 821 | 853
U.S. Government and Federal Agency and Government Sponsored Enterprises (GSEs) [Member] |  |
Available-for-sale securities: |  |
Available-for-sale securities, Fair Value | 8,160 | 12,950
Mortgage-backed Securities - GSE Residential [Member] |  |
Available-for-sale securities: |  |
Available-for-sale securities, Fair Value | 139,640 | 125,510
Small Business Administration [Member] |  |
Available-for-sale securities: |  |
Available-for-sale securities, Fair Value | 3,607 | 4,935
State and Political Subdivisions [Member] |  |
Available-for-sale securities: |  |
Available-for-sale securities, Fair Value | 1,541 | 2,896
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] |  |
Available-for-sale securities: |  |
Mortgage servicing rights | 0 |
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | U.S. Government and Federal Agency and Government Sponsored Enterprises (GSEs) [Member] |  |
Available-for-sale securities: |  |
Available-for-sale securities, Fair Value | 0 |
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Mortgage-backed Securities - GSE Residential [Member] |  |
Available-for-sale securities: |  |
Available-for-sale securities, Fair Value | 0 |
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Small Business Administration [Member] |  |
Available-for-sale securities: |  |
Available-for-sale securities, Fair Value | 0 |
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | State and Political Subdivisions [Member] |  |
Available-for-sale securities: |  |
Available-for-sale securities, Fair Value | 0 |
Significant Other Observable Inputs (Level 2) [Member] |  |
Available-for-sale securities: |  |
Mortgage servicing rights | 0 |
Significant Other Observable Inputs (Level 2) [Member] | U.S. Government and Federal Agency and Government Sponsored Enterprises (GSEs) [Member] |  |
Available-for-sale securities: |  |
Available-for-sale securities, Fair Value | 8,160 | 12,950
Significant Other Observable Inputs (Level 2) [Member] | Mortgage-backed Securities - GSE Residential [Member] |  |
Available-for-sale securities: |  |
Available-for-sale securities, Fair Value | 139,640 | 125,510
Significant Other Observable Inputs (Level 2) [Member] | Small Business Administration [Member] |  |
Available-for-sale securities: |  |
Available-for-sale securities, Fair Value | 3,607 | 4,935
Significant Other Observable Inputs (Level 2) [Member] | State and Political Subdivisions [Member] |  |
Available-for-sale securities: |  |
Available-for-sale securities, Fair Value | 1,541 | 2,896
Significant Unobservable Inputs (Level 3) [Member] |  |
Available-for-sale securities: |  |
Mortgage servicing rights | 821 | $ 853
Significant Unobservable Inputs (Level 3) [Member] | U.S. Government and Federal Agency and Government Sponsored Enterprises (GSEs) [Member] |  |
Available-for-sale securities: |  |
Available-for-sale securities, Fair Value | 0 |
Significant Unobservable Inputs (Level 3) [Member] | Mortgage-backed Securities - GSE Residential [Member] |  |
Available-for-sale securities: |  |
Available-for-sale securities, Fair Value | 0 |
Significant Unobservable Inputs (Level 3) [Member] | Small Business Administration [Member] |  |
Available-for-sale securities: |  |
Available-for-sale securities, Fair Value | 0 |
Significant Unobservable Inputs (Level 3) [Member] | State and Political Subdivisions [Member] |  |
Available-for-sale securities: |  |
Available-for-sale securities, Fair Value | $ 0 |

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- Definition Fair value of an asset representing net future revenue from contractually specified servicing fees, late charges, and other ancillary revenues, in excess of future costs related to servicing arrangements. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6469459&loc=d3e122501-111745 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=116651436&loc=d3e122625-111746 + Details
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