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Securities - Amortized Cost and Approximate Fair Value of Securities, Together with Gross Unrealized Gains and Losses of Securities (Detail) - USD ($) $ in Thousands | Dec. 31, 2019 | Jun. 30, 2019
--- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | $ 144,896 | $ 144,905
Gross Unrealized Gains | 2,316 | 1,723
Gross Unrealized Losses | (405) | (337)
Fair Value | 146,807 | 146,291
U.S. Government and Federal Agency and Government Sponsored Enterprises (GSEs) [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 10,665 | 12,654
Gross Unrealized Gains | 405 | 296
Fair Value | 11,070 | 12,950
Mortgage-backed Securities - GSE Residential [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 128,984 | 124,615
Gross Unrealized Gains | 1,757 | 1,231
Gross Unrealized Losses | (354) | (336)
Fair Value | 130,387 | 125,510
Small Business Administration [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 3,797 | 4,911
Gross Unrealized Gains |  | 25
Gross Unrealized Losses | (50) | (1)
Fair Value | 3,747 | 4,935
State and Political Subdivisions [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 1,450 | 2,725
Gross Unrealized Gains | 154 | 171
Gross Unrealized Losses | (1) |
Fair Value | $ 1,603 | $ 2,896

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- Definition Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27161-111563 + Details
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