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Income Taxes - Schedule Of NOL Carryovers (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Income Tax Disclosure [Abstract]
State NOL Carryovers	$ 16,002	$ 49,278
Federal NOL Carryovers	$ 0	$ 28,637

X

- Definition

Federal NOL Carryovers

+ References

No definition available.

+ Details

Name:	frph_OperatingLossCarryforwardsFederal
Namespace Prefix:	frph_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

State NOL Carryovers

+ References

No definition available.

+ Details

Name:	frph_StateNOLCarryovers
Namespace Prefix:	frph_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- References

No definition available.

+ Details

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