Accrued Interest Receivable (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Interest Receivable and Other Assets [Abstract]
Securities Available for Sale	$ 20	$ 11
Securities Held to Maturity	1	1
Interest Bearing Deposits	15	8
Loans Receivable	387	378
Accrued Interest Receivable	$ 423	$ 398

Represents the information regarding interest bearing deposits including in accrued interest receivable.

No definition available.

Name:	hrgg_InterestBearingDeposits
Namespace Prefix:	hrgg_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Represents the information regarding loans receivable including in accrued interest receivable.

+ References

No definition available.

+ Details

Name:	hrgg_LoansReceivable
Namespace Prefix:	hrgg_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Represents the information regarding securities available for sale including in accrued interest receivable.

+ References

No definition available.

+ Details

Name:	hrgg_SecuritiesAvailableForSale
Namespace Prefix:	hrgg_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Represents the information regarding securities held to maturity including in accrued interest receivable.

+ References

No definition available.

+ Details

Name:	hrgg_SecuritiesHeldToMaturity
Namespace Prefix:	hrgg_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Carrying amount as of the balance sheet date of interest earned but not received. Also called accrued interest or accrued interest receivable.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.8)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_InterestReceivable
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- References

No definition available.

+ Details

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