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Note 12 - Debt (Details Textual) - USD ($) $ in Thousands |  |  |  |  |  |  |  |  |  |  |  |  |  | 3 Months Ended | 6 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Feb. 07, 2025 | Sep. 26, 2024 | Jul. 23, 2024 | May 24, 2024 | Oct. 26, 2023 | Mar. 13, 2023 | Mar. 02, 2023 | Feb. 28, 2023 | Nov. 18, 2022 | Nov. 16, 2022 | Oct. 01, 2021 | Dec. 01, 2020 | Dec. 16, 2003 | Dec. 31, 2024 | Jun. 30, 2024 | Mar. 31, 2024 | Dec. 31, 2024 | Dec. 31, 2024 | Dec. 31, 2023 | Sep. 30, 2024 | Dec. 31, 2022
Long-Term Debt, Gross |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 59,606 |  |  | $ 59,606 | $ 59,606 | $ 46,296 |  |
Gain (Loss) on Extinguishment of Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (160) | 31,616 |  |
Long-Term Debt |  |  |  |  |  |  |  |  |  |  |  |  |  | 57,537 |  |  | 57,537 | 57,537 | 44,416 |  |
Subordinated Liabilities, Period Increase (Decrease) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (54,200) |  |
Fair Value, Option, Changes in Fair Value, Loss |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 300 |  |
Fair Value, Option, Changes in Fair Value, Gain |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,200 |  |
Interest Expense, Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4,790 | 6,250 |  |
Subordinated Debt Obligations, Fair Value Disclosure |  |  |  |  |  |  |  |  |  |  |  |  |  | 13,409 |  |  | 13,409 | 13,409 | 13,594 |  | $ 67,800
Subordinated Liabilities, Extinguished |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 56,100 |  |
Reclassification out of Accumulated Other Comprehensive Income [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain (Loss) on Extinguishment of Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 | 27,177 |  |
Subordinated Debt [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Face Amount |  |  |  |  |  |  |  |  |  |  |  |  | $ 90,500 |  |  |  |  |  |  |  |
Long-Term Debt, Gross |  |  |  |  |  |  |  |  |  |  |  |  |  | 15,000 |  |  | 15,000 | 15,000 | 15,000 |  |
Gain (Loss) on Extinguishment of Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 31,600 |  |
Long-Term Debt |  |  |  |  |  |  |  |  |  |  |  |  |  | 13,409 |  |  | 13,409 | 13,409 | 13,594 |  |
Debt Instrument, Term (Year) |  |  |  |  |  |  |  |  |  |  |  |  | 30 years |  |  |  |  |  |  |  |
Subordinated Liabilities, Period Increase (Decrease) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (200) | 1,900 |  |
Fair Value, Option, Changes in Fair Value, Loss |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 400 | 100 |  |
Fair Value, Option, Changes in Fair Value, Gain |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 200 | 1,800 |  |
Repayments of Subordinated Debt |  |  |  |  |  |  | $ 56,500 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Credit for Previous Debt Repayment |  |  |  |  |  |  | 2,300 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Repaid, Principal |  |  |  |  |  |  | 75,500 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest Expense, Debt |  |  |  |  |  | $ 5,000 | $ 23,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Principal Value |  |  |  |  |  |  |  |  |  |  |  |  |  | 15,000 |  |  | 15,000 | $ 15,000 |  |  |
London Interbank Offered Rate [Member] | Minimum [Member] | Subordinated Debt [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  |  |  |  |  |  |  |  |  |  |  | 3.85% |  |  |  |  |  |  |  |
London Interbank Offered Rate [Member] | Maximum [Member] | Subordinated Debt [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  |  |  |  |  |  |  |  |  |  |  | 4.20% |  |  |  |  |  |  |  |
Ravix Bank Loan [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate During Period |  |  |  |  |  |  |  |  |  |  | 3.75% |  |  |  |  |  |  | 8.00% |  |  |
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 |  |  |  |  |  |  |  |  |  |
Ravix Bank Loan [Member] | Ravix Financial, Inc [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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 Instrument, Interest Rate During Period |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 8.25% |  |  |
Debt Issuance Costs, Net, Total |  |  |  |  |  |  |  |  |  | $ 100 |  |  |  |  |  |  |  |  |  |  |
Amended Ravix Bank Loan [Member] | Ravix Financial, Inc [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayments of Debt | 4,200 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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 |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate During Period |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 8.00% |  |  |
Repayments of Debt |  |  | $ 1,500 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amended Ravix Bank Loan [Member] | Ravix Financial, Inc [Member] | Revolving Credit Facility [Member] | Prime Rate [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  |  |  |  |  |  |  |  | 0.50% |  |  |  |  |  |  |  |  |  |  |
Ravix Bank Loan 2025 [Member] | Ravix Financial, Inc [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Face Amount | $ 9,100 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
The SNS Loan [Member] | Nursing Service LLC [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Face Amount |  |  |  |  |  |  |  |  | $ 6,500 |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate During Period |  |  |  |  |  |  |  |  | 5.00% |  |  |  |  |  |  |  |  | 8.00% |  |  |
Debt Issuance Costs, Net, Total |  |  |  |  |  |  |  |  | $ 100 |  |  |  |  |  |  |  |  |  |  |  |
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] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayments of Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 200 |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  |  |  |  |  | $ 1,000 |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Issuance of Debt |  |  |  |  |  |  |  |  |  |  |  |  |  | 500 |  | $ 200 |  |  |  |  |
DDI Loan [Member] | Digital Diagnostics Imaging, Inc. ("DDI") [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Face Amount |  |  |  |  | $ 5,600 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate During Period |  |  |  |  | 5.00% |  |  |  |  |  |  |  |  |  |  |  |  | 8.00% |  |  |
Debt Issuance Costs, Net, Total |  |  |  |  | $ 100 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-Term Debt, Gross |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 |  |  | 0 | $ 0 | $ 0 |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  | $ 400 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Image Solutions Loan [Member] | Image Solutions, LLC [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Face Amount |  | $ 7,750 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-Term Debt, Gross |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 |  |  | 0 | $ 0 |  |  |
Debt Instrument, Interest Rate During Period |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 8.00% |  |  |
Debt Issuance Costs, Net, Total |  | $ 200 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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 Instrument, Interest Rate During Period |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 7.46% |  |  |
Debt Issuance Costs, Net, Total |  |  |  | 100 |  |  |  |  |  |  |  | $ 400 |  |  |  |  |  |  |  |  |
Repayments of Debt |  |  |  | 9,600 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, LIBOR Floor |  |  |  |  |  |  |  |  |  |  |  | 0.75% |  |  |  |  |  |  |  |  |
Gain (Loss) on Extinguishment of Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (200) |  |  |  |
Long-Term Debt |  |  |  |  |  |  |  |  |  |  |  |  |  | 6,000 |  |  | 6,000 | $ 6,000 |  |  |
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] | Revolving Credit Facility [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Lines of Credit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 500 |  |  |  |  |
Repayments of Lines of Credit |  |  |  | $ 1,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Current Borrowing Capacity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,000 |
Long-Term Debt |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,000 |  |  | $ 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 |  |  |  |  |

X
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Balance Type: | credit
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Balance Type: | credit
Period Type: | instant

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- 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
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Namespace Prefix: | kfs_
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- 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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- 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 Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -SubTopic 10 -Topic 210 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-4 + Details
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