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Subsequent Event (Details Narrative) - Subsequent Event [Member]	Oct. 08, 2021 USD ($) integer
Subsequent Event [Line Items]
Future equity investment loan commitment | $	$ 31,100,000
Interest rate	10.00%
Residential lots | integer	344

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- References

No definition available.

+ Details

Name:	FRPH_EquityMethodInvestmentInterestRate
Namespace Prefix:	FRPH_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

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- References

No definition available.

+ Details

Name:	FRPH_EquityMethodLoanCommitment
Namespace Prefix:	FRPH_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

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- References

No definition available.

+ Details

Name:	FRPH_NumberOfHomes
Namespace Prefix:	FRPH_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

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- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

+ Details

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

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- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: