XML 95 R81.htm IDEA: XBRL DOCUMENT v3.22.4

Subsequent Events - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands															2 Months Ended	3 Months Ended	12 Months Ended
	Feb. 28, 2023	Feb. 23, 2023	Feb. 15, 2023	Nov. 03, 2022	May 02, 2022	Feb. 15, 2022	Nov. 01, 2021	Aug. 02, 2021	May 03, 2021	Feb. 09, 2021	Oct. 26, 2020	Aug. 03, 2020	Apr. 29, 2020	Feb. 14, 2020	Feb. 28, 2023	Dec. 31, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Mar. 01, 2023	Feb. 27, 2023
Subsequent Event [Line Items]
Investments at cost																$ 828,693	$ 828,693	$ 621,786
Dividends to stockholders					$ 0.36	$ 0.36	$ 0.32	$ 0.32	$ 0.31	$ 0.31	$ 0.30	$ 0.30	$ 0.30	$ 0.39		$ 2.00	$ 2.00	$ 1.60	$ 1.33
Dividend payable date					Jun. 24, 2022	Mar. 25, 2022	Dec. 17, 2021	Sep. 28, 2021	Jun. 28, 2021	Mar. 26, 2021	Dec. 18, 2020	Sep. 25, 2020	Jun. 26, 2020	Mar. 27, 2020
Dividend record date					Jun. 10, 2022	Mar. 11, 2022	Dec. 03, 2021	Sep. 14, 2021	Jun. 14, 2021	Mar. 12, 2021	Dec. 04, 2020	Sep. 11, 2020	Jun. 12, 2020	Mar. 13, 2020
Net proceeds from common stock under ATM program																$ 5,811
Common Stock
Subsequent Event [Line Items]
Number of Shares Sold																	290,388	0	0
Subsequent Events
Subsequent Event [Line Items]
Dividend declared date			Feb. 15, 2023
Dividend payable date			Mar. 29, 2023
Dividend record date			Mar. 22, 2023
Subsequent Events | ATM Program
Subsequent Event [Line Items]
Gross proceeds received															$ 2,395
Net proceeds from common stock under ATM program															$ 2,359
Subsequent Events | Common Stock | ATM Program
Subsequent Event [Line Items]
Number of Shares Sold															114,904
Subsequent Events | 5.344% Fixed Interest Rate | SBA Debentures
Subsequent Event [Line Items]
Debt instrument issued amount																					$ 4,000
Debt instrument interim interest rate																					5.344%
QED Parent Holdings, Inc. | First Lien Debt | Subsequent Events
Subsequent Event [Line Items]
Investments at cost																				$ 18,750
CTM Group, Inc. | First Lien Debt, Subordinated Debt and Common Equity | Subsequent Events
Subsequent Event [Line Items]
Investments at cost	$ 10,400														$ 10,400
Investment Date	Feb. 28, 2023
USG AS Holdings, LLC, | First Lien Debt | Subsequent Events
Subsequent Event [Line Items]
Investments at cost		$ 11,000
Investment Date		Feb. 23, 2023
Quarterly Dividend | Subsequent Events
Subsequent Event [Line Items]
Dividends to stockholders			$ 0.41
Supplemental Dividend
Subsequent Event [Line Items]
Dividends to stockholders				$ 0.08	$ 0.07	$ 0.17	$ 0.04	$ 0.06	$ 0.08	$ 0.07	$ 0.04
Dividend payable date				Dec. 16, 2022	Jun. 24, 2022	Mar. 25, 2022	Dec. 17, 2021	Sep. 28, 2021	Jun. 28, 2021	Mar. 26, 2021	Dec. 18, 2020
Dividend record date				Dec. 02, 2022	Jun. 10, 2022	Mar. 11, 2022	Dec. 03, 2021	Sep. 14, 2021	Jun. 14, 2021	Mar. 12, 2021	Dec. 04, 2020
Supplemental Dividend | Subsequent Events
Subsequent Event [Line Items]
Dividends to stockholders			0.15
Special Dividend
Subsequent Event [Line Items]
Dividends to stockholders				$ 0.10			$ 0.05	$ 0.04
Dividend payable date				Dec. 16, 2022			Dec. 17, 2021	Sep. 28, 2021
Dividend record date				Dec. 02, 2022			Dec. 03, 2021	Sep. 14, 2021
Special Dividend | Subsequent Events
Subsequent Event [Line Items]
Dividends to stockholders			$ 0.10

X

- Definition

Debt instrument interim interest rate.

+ References

No definition available.

+ Details

Name:	fdus_DebtInstrumentInterimInterestRate
Namespace Prefix:	fdus_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Debt instrument issued amount.

+ References

No definition available.

+ Details

Name:	fdus_DebtInstrumentIssuedAmount
Namespace Prefix:	fdus_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Gross proceeds from issuance of common stock under at the market program.

+ References

No definition available.

+ Details

Name:	fdus_GrossProceedsFromIssuanceOfCommonStockUnderAtTheMarketProgram
Namespace Prefix:	fdus_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Date the declared dividend will be paid, in YYYY-MM-DD format.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 3
-URI https://asc.fasb.org/extlink&oid=126999549&loc=d3e4304-108586

+ Details

Name:	us-gaap_DividendPayableDateToBePaidDayMonthAndYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The per share amount of a dividend declared, but not paid, as of the financial reporting date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 3
-URI https://asc.fasb.org/extlink&oid=126999549&loc=d3e4304-108586

+ Details

Name:	us-gaap_DividendsPayableAmountPerShare
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Date the dividend to be paid was declared, in YYYY-MM-DD format.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 3
-URI https://asc.fasb.org/extlink&oid=126999549&loc=d3e4304-108586

+ Details

Name:	us-gaap_DividendsPayableDateDeclaredDayMonthAndYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Date the holder must own the stock to be entitled to the dividend, in YYYY-MM-DD format.

+ References

No definition available.

+ Details

Name:	us-gaap_DividendsPayableDateOfRecordDayMonthAndYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Cost of the investment.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 210
-Section 50
-Paragraph 6
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=99383244&loc=d3e12121-115841

+ Details

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

X

- Definition

Date of acquisition for owned restricted investments, in YYYY-MM-DD format.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 320
-Section S99
-Paragraph 1
-Subparagraph (SX 210.12-12(6)(a)(1))
-URI https://asc.fasb.org/extlink&oid=122147990&loc=d3e611133-123010

+ Details

Name:	us-gaap_InvestmentOwnedRestrictedAcquisitionDate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The cash inflow from the additional capital contribution to the entity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3255-108585

+ Details

Name:	us-gaap_ProceedsFromIssuanceOfCommonStock
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Number of new stock issued during the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI https://asc.fasb.org/extlink&oid=126973232&loc=d3e21463-112644

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI https://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(28))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_StockIssuedDuringPeriodSharesNewIssues
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- 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

X

- Details

Name:	us-gaap_StatementEquityComponentsAxis=us-gaap_CommonStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

Name:	us-gaap_SubsidiarySaleOfStockAxis=fdus_AtTheMarketOfferingProgramMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=fdus_FivePointThreeFourFourPercentInterestRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LongtermDebtTypeAxis=fdus_SmallBusinessAdministrationDebenturesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=fdus_QedParentHoldingsIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

Name:	srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=fdus_CtmGroupIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InvestmentSecondaryCategorizationAxis=fdus_FirstLienDebtSubordinatedDebtAndCommonEquityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=fdus_UsgAsHoldingsLlcMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DividendsAxis=fdus_QuarterlyDividendMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DividendsAxis=fdus_SupplementalDividendMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DividendsAxis=fdus_SpecialDividendMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: