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Borrowings - Additional Information (Details) - USD ($) |  |  |  |  | 1 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Nov. 18, 2022 | Aug. 23, 2021 | Mar. 31, 2021 | Nov. 20, 2017 | Apr. 15, 2020 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2022 | Dec. 31, 2021 | Jun. 30, 2022 | Dec. 05, 2021 | Jun. 21, 2019
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Revolving credit facility |  |  |  |  |  | $ 78,400,000 |  | $ 78,400,000 |  | $ 84,000,000 |  |
Total borrowings |  |  |  |  |  | 143,400,000 |  | 143,400,000 |  |  |  |
Redeemed principal amount |  |  |  |  |  |  |  | 2,000 |  |  |  |
Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, maximum borrowing capacity |  |  |  |  |  |  |  |  |  |  |  | $ 50,000,000
Line of Credit Facility, remaining borrowing capacity |  |  |  |  |  |  |  |  |  |  | $ 20,000,000.0 | $ 30,000,000.0
Fee Paid on Undrawn Amounts |  |  |  |  |  |  |  |  |  |  | 0.75% |
London Interbank Offered Rate (LIBOR) |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Bore interest rate per annum |  |  |  | 3.15% |  |  |  |  |  |  |  |
Term Financing |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Related party transaction |  |  |  |  |  |  |  |  |  |  | $ 122,000,000.0 |
Borrowings under the Term Financing |  |  |  |  | $ 102,000,000.0 |  |  |  |  |  |  |
Repayments of Debt |  |  |  |  | $ 20,000,000.0 |  |  |  |  |  |  |
Term Financing | London Interbank Offered Rate (LIBOR) | December 5 2019 - December 4 2020 [Member] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings interest rate spread (percent) |  |  |  |  | 3.55% |  |  |  |  |  |  |
Term Financing | London Interbank Offered Rate (LIBOR) | December 5 2020 - December 4 2021 [Member] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings interest rate spread (percent) |  |  |  |  | 3.15% |  |  |  |  |  |  |
Capital One Revolving Finance |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt Outstanding Amount |  |  |  |  |  |  |  | 78,400,000 |  | 84,000,000.0 |  |
Debt Instrument, unused borrowing capacity, description | The Capital One Revolving Financing required the payment of an upfront fee of 1.125% ($1.3 million) of the available borrowings under the Capital One Revolving Financing at the closing, and requires the payment of an unused fee of (i) 0.75% annually for any undrawn amounts below 50% of the Capital One Revolving Financing, (ii) 0.50% annually for any undrawn amounts between 50% and 75% of the Capital One Revolving Financing, and (iii) 0.25% annually for any undrawn amounts above 75% of the Capital One Revolving Financing. Borrowings under the Capital One Revolving Financing are based on a borrowing base. |  |  |  |  |  |  |  |  |  |  |
Derivative, notional amount |  |  |  |  |  |  |  |  |  | 188,600,000 |  |
Investments at Fair Value |  |  |  |  |  |  |  |  |  | 183,500,000 |  |
Accrued Interest Receivable |  |  |  |  |  | 0 |  | 0 |  |  |  |
Cash held by trustee |  |  |  |  |  |  |  |  |  | 6,600,000 |  |
Weighted average outstanding balance |  |  |  |  |  |  |  | 84,100,000 |  |  |  |
Capital One Revolving Finance | Fair Value, Inputs, Level 3 |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total borrowings |  |  |  |  |  | 78,400,000 |  | 78,400,000 |  | $ 84,000,000.0 |  |
Capital One Revolving Finance | SPV LLC [Member] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Derivative, notional amount |  |  |  |  |  | 194,900,000 |  | 194,900,000 |  |  |  |
Investments at Fair Value |  |  |  |  |  | 187,800,000 |  | 187,800,000 |  |  |  |
Cash held by trustee |  |  |  |  |  | 7,900,000 |  | $ 7,900,000 |  |  |  |
Weighted average outstanding balance |  |  |  |  |  | $ 86,400,000 | $ 101,600,000 |  | $ 101,800,000 |  |  |
Weighted average interest rate |  |  |  |  |  | 6.12% | 2.90% | 5.34% | 3.07% |  |  |
Capital One Revolving Finance | Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Secured revolving credit facility |  | $ 115,000,000 |  |  |  |  |  |  |  |  |  |
Reinvestment period |  | 3 years |  |  |  |  |  |  |  |  |  |
Amortization Period |  | 2 years |  |  |  |  |  |  |  |  |  |
Capital One Revolving Finance | SOFR [Member] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings interest rate spread (percent) | 2.50% |  |  |  |  |  |  |  |  |  |  |
Payment of an upfront fee | $ 1,300,000 |  |  |  |  |  |  |  |  |  |  |
Debt instrument, interest rate during period | 2.00% |  |  |  |  |  |  |  |  |  |  |
2026 Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, maturity date |  |  | Apr. 01, 2026 |  |  |  |  |  |  |  |  |
Debt instrument, interest rate during period |  |  |  |  |  |  |  | 5.54% |  |  |  |
Proceeds from initial public offering |  |  | $ 65,000,000 |  |  |  |  |  |  |  |  |
Debt instrument interest rate |  |  | 4.875% |  |  |  |  |  |  |  |  |
Payments for underwriting expense |  |  | $ 1,300,000 |  |  |  |  |  |  |  |  |
Proceeds from sale of notes |  |  | 63,100,000 |  |  |  |  |  |  |  |  |
Offering expense |  |  | $ 215,000 |  |  |  |  |  |  |  |  |
Aggregate principal amount |  |  |  |  |  | $ 65,000,000.0 |  | $ 65,000,000.0 |  |  |  |
Debt instrument, interest rate, stated percentage |  |  | 4.875% |  |  |  |  |  |  |  |  |
Debt instrument, description of variable rate basis |  |  |  |  |  |  |  | (1) 100% of the principal amount of the 2026 Notes to be redeemed or (2) the sum of the present values of the remaining scheduled payments of principal and interest (exclusive of accrued and unpaid interest to the date of redemption) on the 2026 Notes to be redeemed, discounted to the redemption date on a semi-annual basis (assuming a 360-day year consisting of twelve 30-day months) using the applicable Treasury Rate plus 50 basis points; provided |  |  |  |
Debt instrument, redemption price, percentage |  |  |  |  |  |  |  | 100.00% |  |  |  |
Redeemed principal amount |  |  |  |  |  |  |  | $ 64,800,000 |  |  |  |
2026 Notes [Member] | Minimum |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Redemption notice period |  |  |  |  |  |  |  | 30 years |  |  |  |
2026 Notes [Member] | Maximum |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Redemption notice period |  |  |  |  |  |  |  | 60 years |  |  |  |
2026 Notes [Member] | Fair Value, Inputs, Level 3 |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt, fair value |  |  |  |  |  | $ 57,200,000 |  | $ 57,200,000 |  |  |  |

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- Definition The total amount of cash and securities held by third party trustees pursuant to terms of debt instruments or other agreements as of the date of each statement of financial position presented, which can be used by the trustee only to pay the noncurrent portion of specified obligations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(b)) -URI https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 + 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://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI https://asc.fasb.org/extlink&oid=123466204&loc=SL6031897-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910 Reference 3: 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(22)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 + Details
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- 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. + 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(22)) -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 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910 + Details
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- Definition Average amount borrowed under the credit facility during the period. + References No definition available. + Details
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- 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 -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding). + 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 210.5-02.19(b),22(b)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. + References No definition available. + Details
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- Definition Cash paid for expenses incurred during underwriting activities (the process to review insurance applications, evaluate risks, accept or reject applications, and determine the premiums to be charged) for insurance companies. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (g) -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3536-108585 + Details
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- Definition The cash inflow from additional borrowings, net of cash paid to third parties in connection with debt origination. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3255-108585 + Details
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- Definition The cash inflow associated with the amount received from entity's first offering of stock to the public. + 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
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- Definition Receivables to be collected from (obligations owed to) related parties, net as of the balance sheet date where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(4)(iii)(C)) -URI https://asc.fasb.org/extlink&oid=126975872&loc=SL124442552-122756 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(5)) -URI https://asc.fasb.org/extlink&oid=126975872&loc=SL124442552-122756 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(5)) -URI https://asc.fasb.org/extlink&oid=126975872&loc=SL124442526-122756 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(k)(1)) -URI https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(4)(iv)) -URI https://asc.fasb.org/extlink&oid=126975872&loc=SL124442526-122756 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(4)(iv)) -URI https://asc.fasb.org/extlink&oid=126975872&loc=SL124442552-122756 Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(4)(iii)(B)) -URI https://asc.fasb.org/extlink&oid=126975872&loc=SL124442526-122756 + Details
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- Definition The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3291-108585 + Details
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- Definition Carrying amount of collateralized debt obligations with maturities initially due after one year or beyond the operating cycle, if longer, excluding the current portion. Obligations include, but not limited to, mortgage loans, chattel loans, and other borrowings secured by assets. + 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 210.5-02.22) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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