Minimum LIBOR interest rate for debt instrument.

No definition available.

Name:	kfs_DebtInstrumentLIBORFloor
Namespace Prefix:	kfs_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the minimum draw amount of a debt instrument.

+ References

No definition available.

+ Details

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Namespace Prefix:	kfs_
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Balance Type:	credit
Period Type:	duration

- Definition

For each line item in the statement of financial position, the amounts of gains from fair value changes included in earnings.

+ References

No definition available.

+ Details

Name:	kfs_FairValueOptionChangesInFairValueGain
Namespace Prefix:	kfs_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
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Period Type:	duration

- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Face (par) amount of debt instrument at time of issuance.

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Period Type:	instant

- Definition

Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

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Balance Type:	credit
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- Definition

The average effective interest rate during the reporting period.

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-Section S99
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Balance Type:	na
Period Type:	duration

- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ References

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Balance Type:	na
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	na
Period Type:	instant

- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

For each line item in the statement of financial position, the amounts of gains and losses from fair value changes included in earnings.

+ References

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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Data Type:	xbrli:monetaryItemType
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Period Type:	duration

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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Balance Type:	credit
Period Type:	instant

- Definition

Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

+ References

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Balance Type:	credit
Period Type:	instant

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition

The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Balance Type:	debit
Period Type:	duration

- Definition

Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

+ References

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Balance Type:	debit
Period Type:	duration

- Definition

Amount of cash outflow for short-term and long-term debt. Excludes payment of lease obligation.

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Balance Type:	credit
Period Type:	duration

- Definition

Amount of cash outflow for payment of an obligation from a lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

+ References

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Balance Type:	credit
Period Type:	duration

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=kfs_LondonInterbankOfferedRateMember
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- Details

Name:	srt_RangeAxis=srt_MaximumMember
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- Details

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- Details

Name:	us-gaap_LineOfCreditFacilityAxis=kfs_SpiRevolverMember
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- Details

Name:	us-gaap_DebtInstrumentAxis=kfs_RavixBankLoanMember
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Note 10 - Debt (Details Textual) - USD ($) $ in Thousands												3 Months Ended				6 Months Ended
Note 10 - Debt (Details Textual) - USD ($) $ in Thousands	Feb. 07, 2025	Sep. 26, 2024	Jul. 23, 2024	May 24, 2024	Oct. 26, 2023	Feb. 28, 2023	Nov. 18, 2022	Nov. 16, 2022	Oct. 01, 2021	Dec. 01, 2020	Dec. 16, 2003	Jun. 30, 2025	Dec. 31, 2024	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2025	Dec. 31, 2024	Jun. 30, 2024	Jun. 15, 2025	Mar. 14, 2025	Feb. 27, 2025	May 22, 2003
Long-Term Debt, Gross												$ 59,905	$ 59,606			$ 59,905	$ 59,606
Gain (Loss) on Extinguishment of Debt												0		$ (160)		(115)		$ (160)
Fair Value, Option, Changes in Fair Value, Gain (Loss)												(1)		$ (49)		19		$ (129)
Subordinated Debt [Member]
Debt Instrument, Face Amount																						$ 15,000
Long-Term Debt, Gross												15,000	15,000			15,000	15,000
Debt Instrument, Term (Year)											30 years
Fair Value, Option, Changes in Fair Value, Gain																500
Fair Value, Option, Changes in Fair Value, Gain (Loss)																100
London Interbank Offered Rate [Member] \| Maximum [Member] \| Subordinated Debt [Member]
Debt Instrument, Basis Spread on Variable Rate											4.20%
Revolving Credit Facility [Member] \| SPI Revolver [Member]
Line of Credit Facility, Maximum Borrowing Capacity																			$ 300
Long-Term Line of Credit												0				0
Ravix Bank Loan [Member]
Debt Instrument, Interest Rate During Period									3.75%
Ravix Bank Loan [Member] \| Prime Rate [Member]
Debt Instrument, Basis Spread on Variable Rate									0.50%
Ravix Bank Loan [Member] \| Ravix Financial, Inc [Member]
Debt Instrument, Face Amount									$ 6,000
Debt Issuance Costs, Net, Total									200
Repayments of Debt	$ 2,200
Ravix Bank Loan [Member] \| Ravix Financial, Inc [Member] \| Revolving Credit Facility [Member]
Long-Term Debt, Gross									$ 1,000
Amended Ravix Bank Loan [Member] \| Ravix Financial, Inc [Member]
Debt Instrument, Face Amount								$ 6,000
Debt Issuance Costs, Net, Total								$ 100
Repayments of Debt	$ 4,200
Gain (Loss) on Extinguishment of Debt																(100)
Amended Ravix Bank Loan [Member] \| Ravix Financial, Inc [Member] \| Prime Rate [Member]
Debt Instrument, Basis Spread on Variable Rate								0.75%
Amended Ravix Bank Loan [Member] \| Ravix Financial, Inc [Member] \| Revolving Credit Facility [Member]
Debt Instrument, Face Amount			$ 500
Long-Term Debt, Gross								$ 1,000
Repayments of Debt			$ 1,500
Ravix Bank Loan 2025 [Member] \| Ravix Financial, Inc [Member]
Debt Instrument, Face Amount																					$ 9,100
Debt Issuance Costs, Net, Total												$ 100				$ 100
Debt Instrument, Interest Rate, Effective Percentage												8.00%				8.00%
Ravix Bank Loan 2025 [Member] \| Ravix Financial, Inc [Member] \| Prime Rate [Member]
Debt Instrument, Basis Spread on Variable Rate	0.50%
The SNS Loan [Member] \| Nursing Service LLC [Member]
Debt Instrument, Face Amount							$ 6,500
Debt Instrument, Interest Rate During Period							5.00%
Debt Issuance Costs, Net, Total							$ 100
Debt Instrument, Interest Rate, Effective Percentage												8.00%				8.00%
The SNS Loan [Member] \| Nursing Service LLC [Member] \| Prime Rate [Member]
Debt Instrument, Basis Spread on Variable Rate							0.50%
The SNS Loan [Member] \| Nursing Service LLC [Member] \| Revolving Credit Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity							$ 1,000
Proceeds from Issuance of Debt													$ 500			$ 300
DDI Loan [Member] \| Digital Diagnostics Imaging, Inc. ("DDI") [Member]
Debt Instrument, Face Amount					$ 5,600
Debt Instrument, Interest Rate During Period					5.00%
Debt Issuance Costs, Net, Total					$ 100
Debt Instrument, Interest Rate, Effective Percentage												8.00%				8.00%
DDI Loan [Member] \| Digital Diagnostics Imaging, Inc. ("DDI") [Member] \| Prime Rate [Member]
Debt Instrument, Basis Spread on Variable Rate					0.50%
DDI Loan [Member] \| Digital Diagnostics Imaging, Inc. ("DDI") [Member] \| Revolving Credit Facility [Member]
Repayments of Debt																$ 100
Line of Credit Facility, Maximum Borrowing Capacity					$ 400
Proceeds from Issuance of Debt																100
Image Solutions Loan [Member] \| Image Solutions, LLC [Member]
Debt Instrument, Face Amount		$ 7,750
Long-Term Debt, Gross												$ 0				$ 0
Debt Issuance Costs, Net, Total		$ 200
Debt Instrument, Interest Rate, Effective Percentage												8.00%				8.00%
Image Solutions Loan [Member] \| Image Solutions, LLC [Member] \| Minimum [Member]
Debt Instrument, Interest Rate During Period		7.25%
Image Solutions Loan [Member] \| Image Solutions, LLC [Member] \| Prime Rate [Member]
Debt Instrument, Basis Spread on Variable Rate		0.50%
Image Solutions Loan [Member] \| Image Solutions, LLC [Member] \| Revolving Credit Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity		$ 500
KWH Bank Loan [Member]
Debt Instrument, Face Amount				$ 15,000
Debt Issuance Costs, Net, Total				100						$ 400
Repayments of Debt				9,600
Gain (Loss) on Extinguishment of Debt																	(200)
Proceeds from Issuance of Debt																	6,000
Debt Instrument, LIBOR Floor										0.75%
KWH Bank Loan [Member] \| Delayed Draw Term Loan (DDTL) [Member]
Debt Instrument, Face Amount				6,000
Repayments of Debt				3,100
Debt Instrument, Minimum Draw Amount				$ 2,000
KWH Bank Loan [Member] \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] \| Minimum [Member]
Debt Instrument, Basis Spread on Variable Rate										2.62%
KWH Bank Loan [Member] \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] \| Maximum [Member]
Debt Instrument, Basis Spread on Variable Rate										3.12%
KWH Bank Loan [Member] \| Secured Overnight Financing Rate (SOFR) [Member]
Debt Instrument, LIBOR Floor				0.75%
KWH Bank Loan [Member] \| Secured Overnight Financing Rate (SOFR) [Member] \| Minimum [Member]
Debt Instrument, Basis Spread on Variable Rate				2.62%
KWH Bank Loan [Member] \| Secured Overnight Financing Rate (SOFR) [Member] \| Maximum [Member]
Debt Instrument, Basis Spread on Variable Rate				3.12%
KWH Bank Loan [Member] \| Revolving Credit Facility [Member]
Debt Instrument, Interest Rate, Effective Percentage												7.44%				7.44%
Proceeds from Issuance of Debt																	$ 1,000
Proceeds from Lines of Credit															$ 500
Repayments of Lines of Credit				$ 1,000
Line of Credit Facility, Current Borrowing Capacity												$ 1,000				$ 1,000
KWH Bank Loan [Member] \| PWI Holdings [Member]
Long-Term Debt, Gross										$ 25,700
KWH Bank Loan [Member] \| PWI Holdings [Member] \| Term Loan [Member]
Long-Term Debt, Gross										24,700
KWH Bank Loan [Member] \| PWI Holdings [Member] \| Revolving Credit Facility [Member]
Long-Term Debt, Gross										$ 1,000
Second Amendment to KWH Loan [Member] \| Revolving Credit Facility [Member]
Debt Instrument, Face Amount						$ 10,000
Debt Instrument, Minimum Draw Amount						$ 2,000
Debt Instrument, Interest Rate, Stated Percentage						3.75%
Proceeds from Lines of Credit															$ 3,500
KPH Note [Member]
Debt Instrument, Face Amount																				$ 1,250
Long-Term Debt, Gross																				1,300
Debt Issuance Costs, Net, Total																				$ 200
Debt Instrument, Interest Rate, Stated Percentage																				6.00%
Debt Instrument, Fair Value Disclosure																				$ 1,100