Borrowings - Summary of SBA-Guaranteed Debentures (Details) $ in Thousands	Sep. 30, 2026 USD ($)
Debt Instrument [Line Items]
Debenture Amount	$ 120,000
SBA Guaranteed Debentures, Issued September 25, 2019, Maturity Date September 1, 2029 \| SBIC II
Debt Instrument [Line Items]
Debenture Amount	$ 4,000
SBA Guaranteed Debentures, Issued September 25, 2019, Maturity Date September 1, 2029 \| SBIC II \| SBA-guaranteed debentures
Debt Instrument [Line Items]
Interest Rate	2.283%
SBA Annual Charge	0.222%
SBA Guaranteed Debentures, Issued March 25, 2020, Maturity Date March, 1 2030 \| SBIC II
Debt Instrument [Line Items]
Debenture Amount	$ 41,000
SBA Guaranteed Debentures, Issued March 25, 2020, Maturity Date March, 1 2030 \| SBIC II \| SBA-guaranteed debentures
Debt Instrument [Line Items]
Interest Rate	2.078%
SBA Annual Charge	0.222%
SBA Guaranteed Debentures, Issued March 25, 2020, Maturity Date March, 1 2030 \| SBIC II
Debt Instrument [Line Items]
Debenture Amount	$ 24,000
SBA Guaranteed Debentures, Issued March 25, 2020, Maturity Date March, 1 2030 \| SBIC II \| SBA-guaranteed debentures
Debt Instrument [Line Items]
Interest Rate	2.078%
SBA Annual Charge	0.275%
SBA Guaranteed Debentures, Issued September 23, 2020, Maturity Date September 1, 2030 \| SBIC II
Debt Instrument [Line Items]
Debenture Amount	$ 51,000
SBA Guaranteed Debentures, Issued September 23, 2020, Maturity Date September 1, 2030 \| SBIC II \| SBA-guaranteed debentures
Debt Instrument [Line Items]
Interest Rate	1.034%
SBA Annual Charge	0.275%