1001 - Disclosure - N-2 - [Senior Securities] link:presentationLink link:definitionLink link:calculationLink 1002 - Disclosure - N-2 - [Investment Objectives] link:presentationLink link:definitionLink link:calculationLink 1003 - Disclosure - N-2 - [Risk Factors] link:presentationLink link:definitionLink link:calculationLink 1004 - Disclosure - N-2 - [Long Term Debt] link:presentationLink link:definitionLink link:calculationLink Risks Related to the Notes [Member] April Two Thousand Ninteen Notes [Member] February 2025 Notes [Member] February 2029 Notes [Member] January 2027 Notes [Member] July 2024 Notes [Member] June 2025 Notes [Member] June 2025 Three Year Notes [Member] June 2025 3-Year Notes [Member] June 2030 Notes [Member] March 2026 A Notes [Member] March 2026 B Notes [Member] Secured Credit Facility with MUFG Bank Ltd MUFG [Member] Secured Credit Facility with MUFG Bank Ltd. (MUFG) [Member] Secured Credit Facility with Sumitomo Mitsui Banking Corporation SMBC [Member] Secured Credit Facility with Sumitomo Mitsui Banking Corporation (SMBC) [Member] Securitized Credit Facility with Wells Fargo Capital Finance [Member] September 2019 Notes [Member] September 2026 Notes [Member] Small Business Administration Debentures (HC IV) [Member] Small Business Administration Debentures (HT III) [Member] Small Business Administration Debentures (HT II) [Member] Small Business Administration Debentures SBIC V [Member] Small Business Administration Debentures (SBIC V) [Member] Total Senior Securities [Member] Two Thousand And Thirty One Asset Backed Notes [Member] 2031 Asset-Backed Notes [Member] Two Thousand And Thirty Three [Member] 2033 Notes [Member] Two Thousand And Twenty Eight Asset Backed Notes [Member] 2028 Asset-Backed Notes [Member] Two Thousand and Twenty Eight Convertible Notes [Member] 2028 Convertible Notes [Member] Two Thousand And Twenty One Asset Backed Notes [Member] 2021 Asset-Backed Notes [Member] Two Thousand And Twenty Seven Asset Backed Notes [Member] 2027 Asset-Backed Notes [Member] Two Thousand and Twenty Two Convertible Notes [Member] 2022 Convertible Notes [Member] Two Thousand Sixteen Convertible Notes [Member] 2016 Convertible Notes [Member] Two Thousand Twenty Five [Member] 2025 Notes [Member] Two Thousand Twenty Four [Member] 2024 Notes [Member] Two Thousand Twenty Two Notes [Member] 2022 Notes [Member]