Loans - Summary of the Activity in Loans Classified as TDRs (Detail)	9 Months Ended	12 Months Ended
Sep. 30, 2018 USD ($) Contracts	Dec. 31, 2017 USD ($) Contracts
Financing Receivable, Modifications [Line Items]
Beginning Balance	$ 3,163,000
New TDR	322,000
Loan Amortization	(56,000)
Ending Balance	$ 3,518,000	$ 3,163,000
Non-Residential Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans \| Contracts	3	2
Pre-Modification Outstanding Record Investment	$ 3,195,191	$ 3,163,435
Post Modification Outstanding Record Investment, net of related allowance	3,195,191	3,163,435
Beginning Balance	3,163,000
New TDR	322,000
Loan Amortization	(56,000)
Ending Balance	$ 3,429,000	$ 3,163,000
Commercial Loans [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans \| Contracts	1
Pre-Modification Outstanding Record Investment	$ 322,317
Post Modification Outstanding Record Investment, net of related allowance	322,317
New TDR	89,000
Ending Balance	$ 89,000

Financing receivable troubled debt restructurings loan amortization.

No definition available.

Name:	hfbc_FinancingReceivableTroubledDebtRestructuringsLoanAmortization
Namespace Prefix:	hfbc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

New troubled debt restructurings.

+ References

No definition available.

+ Details

Name:	hfbc_NewTroubledDebtRestructurings
Namespace Prefix:	hfbc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Performing financing receivable troubled debt restructurings.

+ References

No definition available.

+ Details

Name:	hfbc_PerformingFinancingReceivableTroubledDebtRestructurings
Namespace Prefix:	hfbc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_FinancingReceivableModificationsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of financing receivables that have been modified by troubled debt restructurings.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953676-111524

+ Details

Name:	us-gaap_FinancingReceivableModificationsNumberOfContracts2
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Post-modification amount of investment in financing receivables modified by troubled debt restructurings.

+ References

+ Details

Name:	us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Pre-modification amount of investment in financing receivables modified by troubled debt restructurings.

+ References

+ Details

Name:	us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=hfbc_NonResidentialRealEstateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_CommercialPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: