XML 50 R41.htm IDEA: XBRL DOCUMENT v3.23.1

Fair Value Measurements - Summary of Significant Unobservable Inputs by Valuation Technique to Determine Fair Value (Details) $ in Thousands	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Fair Value	$ 393,459	$ 368,817
Level 3 | Enterprise Value | EBITDA Multiples
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity Investments, Equity Fair Value	115,739	111,808
Equity Investments, Warrants fair value	$ 2,225	$ 1,949
Level 3 | Enterprise Value | EBITDA Multiples | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity Investments, Equity, Range	3.5	4.0
Equity investments, Warrants range	6.0	6.0
Level 3 | Enterprise Value | EBITDA Multiples | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity Investments, Equity, Range	16.0	16.8
Equity investments, Warrants range	6.0	6.0
Level 3 | Enterprise Value | EBITDA Multiples | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity Investments, Equity, Range	8.3	8.1
Equity investments, Warrants range	6.0	6.0
Level 3 | Enterprise Value | Revenue Multiples
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity Investments, Equity Fair Value	$ 6,102	$ 5,623
Equity Investments, Warrants fair value	$ 132	$ 130
Level 3 | Enterprise Value | Revenue Multiples | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity Investments, Equity, Range	0.9	0.9
Equity investments, Warrants range	4.5	4.5
Level 3 | Enterprise Value | Revenue Multiples | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity Investments, Equity, Range	7.5	7.8
Equity investments, Warrants range	4.5	4.5
Level 3 | Enterprise Value | Revenue Multiples | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity Investments, Equity, Range	5.8	6.4
Equity investments, Warrants range	4.5	4.5
Level 3 | Subordinated Debt | Discounted Cash Flow | Weighted Average Cost of Capital
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Fair Value	$ 102,386	$ 97,706
Level 3 | Subordinated Debt | Discounted Cash Flow | Weighted Average Cost of Capital | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Range	0.101	0.100
Level 3 | Subordinated Debt | Discounted Cash Flow | Weighted Average Cost of Capital | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Range	0.236	0.152
Level 3 | Subordinated Debt | Discounted Cash Flow | Weighted Average Cost of Capital | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Range	0.127	0.125
Level 3 | Subordinated Debt | Enterprise Value | EBITDA Multiples
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Fair Value		$ 3,750
Level 3 | Subordinated Debt | Enterprise Value | EBITDA Multiples | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Range		8.5
Level 3 | Subordinated Debt | Enterprise Value | EBITDA Multiples | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Range		8.5
Level 3 | Subordinated Debt | Enterprise Value | EBITDA Multiples | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Range		8.5
Level 3 | First Lien Debt | Discounted Cash Flow | Weighted Average Cost of Capital
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Fair Value	$ 452,536	$ 441,830
Level 3 | First Lien Debt | Discounted Cash Flow | Weighted Average Cost of Capital | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Range	0.095	0.089
Level 3 | First Lien Debt | Discounted Cash Flow | Weighted Average Cost of Capital | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Range	0.206	0.219
Level 3 | First Lien Debt | Discounted Cash Flow | Weighted Average Cost of Capital | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Range	0.158	0.155
Level 3 | First Lien Debt | Enterprise Value | Asset Coverage
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Fair Value	$ 11,000	$ 11,000
Level 3 | First Lien Debt | Enterprise Value | Asset Coverage | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Range	1.0	1.1
Level 3 | First Lien Debt | Enterprise Value | Asset Coverage | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Range	1.0	1.1
Level 3 | First Lien Debt | Enterprise Value | Asset Coverage | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Range	1.0	1.1
Level 3 | First Lien Debt | Enterprise Value | EBITDA Multiples
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Fair Value	$ 14,986
Level 3 | First Lien Debt | Enterprise Value | EBITDA Multiples | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Range	7.3
Level 3 | First Lien Debt | Enterprise Value | EBITDA Multiples | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Range	7.3
Level 3 | First Lien Debt | Enterprise Value | EBITDA Multiples | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Range	7.3
Level 3 | First Lien Debt | Enterprise Value | Revenue Multiples
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Fair Value	$ 3,025	$ 3,275
Level 3 | First Lien Debt | Enterprise Value | Revenue Multiples | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Range	4.3	4.3
Level 3 | First Lien Debt | Enterprise Value | Revenue Multiples | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Range	4.3	4.3
Level 3 | First Lien Debt | Enterprise Value | Revenue Multiples | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Range	4.3	4.3
Level 3 | Second Lien Debt | Discounted Cash Flow
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Fair Value		$ 18,000
Level 3 | Second Lien Debt | Discounted Cash Flow | Weighted Average Cost of Capital
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Fair Value	$ 186,808	$ 180,825
Level 3 | Second Lien Debt | Discounted Cash Flow | Weighted Average Cost of Capital | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Range	0.115	0.117
Level 3 | Second Lien Debt | Discounted Cash Flow | Weighted Average Cost of Capital | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Range	0.250	0.250
Level 3 | Second Lien Debt | Discounted Cash Flow | Weighted Average Cost of Capital | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Range	0.148	0.145
Level 3 | Second Lien Debt | Enterprise Value | Asset Coverage
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Fair Value	$ 2,123	$ 2,123
Level 3 | Second Lien Debt | Enterprise Value | Asset Coverage | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Range	0.8	0.8
Level 3 | Second Lien Debt | Enterprise Value | Asset Coverage | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Range	0.8	0.8
Level 3 | Second Lien Debt | Enterprise Value | Asset Coverage | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Range	0.8	0.8
Level 3 | Second Lien Debt | Enterprise Value | EBITDA Multiples | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Range	5.0	5.0
Level 3 | Second Lien Debt | Enterprise Value | EBITDA Multiples | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Range	5.0	5.0
Level 3 | Second Lien Debt | Enterprise Value | EBITDA Multiples | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Investments, Range	5.0	5.0

X

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 55
-Paragraph 69C
-URI https://asc.fasb.org/extlink&oid=123466577&loc=SL123495737-112612

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 55
-Paragraph 69B
-URI https://asc.fasb.org/extlink&oid=123466577&loc=SL123495735-112612

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-URI https://asc.fasb.org/extlink&oid=123594938&loc=d3e13433-108611

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 1D
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495340-112611

+ Details

Name:	us-gaap_DebtInstrumentFairValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Value of input used to measure debt instrument, including, but not limited to, convertible and non-convertible debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258

+ Details

Name:	us-gaap_DebtInstrumentMeasurementInput
Namespace Prefix:	us-gaap_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Value of input used to measure derivative asset.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258

+ Details

Name:	us-gaap_DerivativeAssetMeasurementInput
Namespace Prefix:	us-gaap_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 55
-Paragraph 10
-URI https://asc.fasb.org/extlink&oid=99393222&loc=SL20226008-175313

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 55
-Paragraph 22
-URI https://asc.fasb.org/extlink&oid=99393222&loc=SL20226052-175313

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-URI https://asc.fasb.org/extlink&oid=123594938&loc=d3e13433-108611

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312

+ Details

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

X

- Definition

Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 45
-Paragraph 1A
-URI https://asc.fasb.org/extlink&oid=123594786&loc=SL75136599-209740

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(2))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

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

X

- Definition

Value of input used to measure investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258

+ Details

Name:	us-gaap_EquitySecuritiesFvNiMeasurementInput
Namespace Prefix:	us-gaap_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

X

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ValuationTechniqueAxis=fdus_ValuationTechniqueEnterpriseValueMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputEbitdaMultipleMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_WeightedAverageMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputRevenueMultipleMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InvestmentTypeAxis=us-gaap_SubordinatedDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ValuationTechniqueAxis=us-gaap_ValuationTechniqueDiscountedCashFlowMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_MeasurementInputTypeAxis=fdus_MeasurementInputWeightedAverageCostOfCapitalMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=fdus_FirstLienDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_MeasurementInputTypeAxis=fdus_MeasurementInputAssetCoverageMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=fdus_SecondLienDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: