XML 81 R67.htm IDEA: XBRL DOCUMENT
v3.22.4

Common Stock - Summary of Equity ATM Program (Details) - Common Stock - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2022 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Class of Stock [Line Items] |  |  |  |
Number of Shares Sold |  | 290,388 | 0 | 0
Raymond James & Associates, Inc. and B. Riley Securities, Inc. |  |  |  |
Class of Stock [Line Items] |  |  |  |
Number of Shares Sold | 290,388 | 290,388 |  |
Gross Proceeds Received | $ 5,900 | $ 5,900 |  |
Sales Agent Commissions and Offering Costs | $ 89 | $ 89 |  |
Weighted-Average Price | $ 20.32 | $ 20.32 |  |

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 Sales agent commissions and offering costs under at the market program. + References No definition available. + Details
Name: | fdus_SalesAgentCommissionsAndOfferingCostsUnderAtTheMarketProgram
Namespace Prefix: | fdus_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Weighted average price of common stock under at the market program. + References No definition available. + Details
Name: | fdus_WeightedAveragePriceOfCommonStockUnderAtTheMarketProgram
Namespace Prefix: | fdus_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

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_ClassOfStockLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
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
- Details
Name: | us-gaap_StatementEquityComponentsAxis=us-gaap_CommonStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=fdus_RaymondJamesAndAssociatesIncAndRobertWBairdAndCoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |