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Stockholders' Equity and Regulatory Capital (Details Textual) - USD ($) $ in Millions | 12 Months Ended
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Jun. 30, 2018 | Jun. 30, 2017
Stockholders' Equity and Regulatory Capital (Textual) |  |
Percentage of capital conservation buffer | 1.25% |
First Federal MHC waived dividends | $ 1.9 | $ 1.9
Description of minimum risk-based capital requirements | The CCB will eventually be 2.5% and is being phased in over a five year period. The current CCB is equal to 1.25% and increases 0.625% annually through 2019 to 2.5%. |
Qualified Thrift Lender test, description | Federal regulations require the Banks comply with the Qualified Thrift Lender ("QTL") test, which requires that 65% of assets be maintained in housing-related finance and other specified assets. |
CCB [Member] |  |
Stockholders' Equity and Regulatory Capital (Textual) |  |
Tier 1 leverage ratio | 5.00% |
Tier 1 risk-based capital ratio | 8.00% |
Total risk-based capital ratio | 10.00% |
Common equity Tier 1 risk-based capital ratio | 6.50% |

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- Definition Total Capital divided by risk weighted assets as defined in the regulations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958568-112826 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=84167132&loc=d3e65071-112826 + Details
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- Definition Disclosure for all mortgage companies, containing a description of factors that may affect adequacy of minimum net worth requirements such as potentially volatile components of capital, qualitative factors, and regulatory mandates. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 948 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=6490092&loc=d3e47080-110998 + Details
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