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Consolidated Schedule of Investments (Unaudited) - Investments (Details) - USD ($)
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Investments at cost $ 766,774,000 $ 759,182,000  
Investments at fair value 697,891,000 709,085,000  
Investment, Unaffiliated Issuer [Member]      
Investments at cost 694,503,000 716,077,000  
Investments at fair value 657,765,000 693,730,000  
Investment, Affiliated Issuer, Noncontrolled [Member]      
Investments at cost 27,491,000 28,677,000  
Investments at fair value 8,307,000 1,132,000 $ 0
Investment, Affiliated Issuer, Controlled [Member]      
Investments at cost 44,780,000 14,428,000  
Investments at fair value 31,819,000 14,223,000 0
Software Sector [Member]      
Investments at cost 154,040,000 164,133,000  
Investments at fair value 151,043,000 160,749,000  
Diagnostics Sector [Member]      
Investments at cost 16,704,000 19,735,000  
Investments at fair value 13,701,000 19,701,000  
Biotechnology Sector [Member]      
Investments at cost 118,221,000 145,544,000  
Investments at fair value 97,562,000 117,781,000  
Medical Device Sector [Member]      
Investments at cost 213,564,000 147,064,000  
Investments at fair value 205,634,000 145,019,000  
Technology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost 8,918,000    
Investments at fair value 10,650,000    
Communications Sector [Member]      
Investments at cost 11,711,000 19,192,000  
Investments at fair value 14,763,000 22,188,000  
Other Sustainability Sector [Member]      
Investments at cost 66,151,000 98,906,000  
Investments at fair value 66,079,000 80,370,000  
Other Healthcare Sector [Member]      
Investments at cost 39,533,000 102,000  
Investments at fair value 40,144,000 1,366,000  
Energy Efficiency [Member]      
Investments at cost 9,818,000 111,000  
Investments at fair value 9,712,000 13,000  
Networking Sector [Member]      
Investments at cost 10,070,000 5,451,000  
Investments at fair value 9,827,000 5,297,000  
Data Storage Sector [Member]      
Investments at cost 417,000 417,000  
Investments at fair value 350,000 418,000  
Internet and Media Sector [Member]      
Investments at cost 329,000 329,000  
Investments at fair value 999,000 1,582,000  
Power Management Sector [Member]      
Investments at cost 0 1,585,000  
Investments at fair value 0 2,700,000  
Semiconductor Sector [Member]      
Investments at cost 45,000 45,000  
Investments at fair value 0 0  
Software, Healthcare Information and Service [Member]      
Investments at cost 51,750,000 50,899,000  
Investments at fair value 51,410,000 $ 50,574,000  
DropOff, Inc. [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, One [Member]      
Cash Rate   15.00%  
Margin   6.50%  
Floor   9.75%  
Ceiling   0.00%  
ETP   3.50%  
Maturity Date   Apr. 01, 2026  
Principal Amount   $ 6,625,000  
Investments at cost   6,519,000  
Investments at fair value   $ 6,176,000  
DropOff, Inc. [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Two [Member]      
Cash Rate   15.00%  
Margin   6.50%  
Floor   9.75%  
Ceiling   0.00%  
ETP   3.50%  
Maturity Date   Apr. 01, 2026  
Principal Amount   $ 6,116,000  
Investments at cost   6,018,000  
Investments at fair value   5,701,000  
DropOff, Inc. [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member] | Common Stock Warrants [Member]      
Investments at cost   455,000  
Investments at fair value   $ 46,000  
Number of Shares (in shares)   516,732  
DropOff, Inc. [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Three [Member]      
Cash Rate   15.00%  
Margin   6.50%  
Floor   9.75%  
Ceiling   0.00%  
ETP   3.50%  
Maturity Date   Aug. 01, 2026  
Principal Amount   $ 2,548,000  
Investments at cost   2,507,000  
Investments at fair value   $ 2,375,000  
Hound Labs, Inc. [Member] | Diagnostics Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, One [Member]      
Cash Rate   14.50%  
Margin   6.00%  
Floor   9.25%  
Ceiling   0.00%  
ETP   3.50%  
Maturity Date   Jun. 01, 2026  
Principal Amount   $ 2,500,000  
Investments at cost   2,484,000  
Investments at fair value   2,484,000  
Hound Labs, Inc. [Member] | Diagnostics Sector [Member] | Investment, Unaffiliated Issuer [Member] | Preferred Stock Warrants [Member]      
Investments at cost   46,000  
Investments at fair value   $ 12,000  
Number of Shares (in shares)   171,370  
Hound Labs, Inc. [Member] | Diagnostics Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Two [Member]      
Cash Rate   14.50%  
Margin   6.00%  
Floor   9.25%  
Ceiling   0.00%  
ETP   3.50%  
Maturity Date   Jun. 01, 2026  
Principal Amount   $ 2,500,000  
Investments at cost   2,484,000  
Investments at fair value   $ 2,484,000  
Hound Labs, Inc. [Member] | Diagnostics Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Three [Member]      
Cash Rate   14.50%  
Margin   6.00%  
Floor   9.25%  
Ceiling   0.00%  
ETP   3.50%  
Maturity Date   Jun. 01, 2026  
Principal Amount   $ 5,000,000  
Investments at cost   4,968,000  
Investments at fair value   4,968,000  
Evelo Biosciences, Inc. [Member] | Investment, Affiliated Issuer, Noncontrolled [Member]      
Investments at fair value 8,307,000 $ 1,132,000 0
Evelo Biosciences, Inc. [Member] | Biotechnology Sector [Member] | Investment, Affiliated Issuer, Noncontrolled [Member] | Term Loan, Prime Index, One [Member]      
Cash Rate   12.75%  
Margin   4.25%  
Floor   11.00%  
Ceiling   0.00%  
ETP   2.27%  
Maturity Date   Jan. 01, 2028  
Principal Amount   $ 5,532,000  
Investments at cost   5,228,000  
Investments at fair value   $ 222,000  
Evelo Biosciences, Inc. [Member] | Biotechnology Sector [Member] | Investment, Affiliated Issuer, Noncontrolled [Member] | Term Loan, Prime Index Two [Member]      
Cash Rate   12.75%  
Margin   4.25%  
Floor   11.00%  
Ceiling   0.00%  
ETP   2.27%  
Maturity Date   Jan. 01, 2028  
Principal Amount   $ 8,298,000  
Investments at cost   7,867,000  
Investments at fair value   $ 336,000  
Evelo Biosciences, Inc. [Member] | Biotechnology Sector [Member] | Investment, Affiliated Issuer, Noncontrolled [Member] | Term Loan, Prime Index Three [Member]      
Cash Rate   12.75%  
Margin   4.25%  
Floor   11.00%  
Ceiling   0.00%  
ETP   2.27%  
Maturity Date   Jan. 01, 2028  
Principal Amount   $ 3,319,000  
Investments at cost   3,137,000  
Investments at fair value   $ 133,000  
Evelo Biosciences, Inc. [Member] | Biotechnology Sector [Member] | Investment, Affiliated Issuer, Noncontrolled [Member] | Term Loan, Prime Index, Four [Member]      
Cash Rate   12.75%  
Margin   4.25%  
Floor   11.00%  
Ceiling   0.00%  
ETP   2.27%  
Maturity Date   Jan. 01, 2028  
Principal Amount   $ 3,319,000  
Investments at cost   3,137,000  
Investments at fair value   $ 133,000  
Evelo Biosciences, Inc. [Member] | Biotechnology Sector [Member] | Investment, Affiliated Issuer, Noncontrolled [Member] | Term Loan, Prime Index, Five [Member]      
Cash Rate   12.75%  
Margin   4.25%  
Floor   11.00%  
Ceiling   0.00%  
ETP   2.27%  
Maturity Date   Jan. 01, 2028  
Principal Amount   $ 2,213,000  
Investments at cost   2,091,000  
Investments at fair value   $ 88,000  
Evelo Biosciences, Inc. [Member] | Biotechnology Sector [Member] | Investment, Affiliated Issuer, Noncontrolled [Member] | Term Loan, Prime Index, Six [Member]      
Cash Rate   12.75%  
Margin   4.25%  
Floor   11.00%  
Ceiling   0.00%  
ETP   2.27%  
Maturity Date   Jan. 01, 2028  
Principal Amount   $ 2,213,000  
Investments at cost   2,091,000  
Investments at fair value   88,000  
Aulea Medical, Inc. [Member] | Investment, Affiliated Issuer, Noncontrolled [Member]      
Investments at fair value 0 0 0
Better Place Forests Co. [Member] | Investment, Affiliated Issuer, Controlled [Member]      
Investments at fair value $ 0 $ 7,993,000 0
Better Place Forests Co. [Member] | Consumer-related Technologies [Member] | Investment, Affiliated Issuer, Controlled [Member] | Term Loan, Prime Index, One [Member]      
Cash Rate   12.25%  
Margin   3.75%  
Floor   12.00%  
Ceiling   0.00%  
ETP   1.85%  
Maturity Date   Aug. 01, 2029  
Principal Amount   $ 3,547,000  
Investments at cost   3,585,000  
Investments at fair value   $ 3,339,000  
Better Place Forests Co. [Member] | Consumer-related Technologies [Member] | Investment, Affiliated Issuer, Controlled [Member] | Term Loan, Prime Index Two [Member]      
Cash Rate   12.25%  
Margin   3.75%  
Floor   12.00%  
Ceiling   0.00%  
ETP   1.85%  
Maturity Date   Aug. 01, 2029  
Principal Amount   $ 1,773,000  
Investments at cost   1,750,000  
Investments at fair value   1,630,000  
Castle Creek Biosciences, Inc [Member] | Biotechnology Sector [Member] | Investment, Unaffiliated Issuer [Member] | Preferred Stock Warrants [Member]      
Investments at cost   214,000  
Investments at fair value   $ 318,000  
Number of Shares (in shares)   7,404  
Candesant Biomedical, Inc. [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, One [Member]      
Cash Rate   12.00%  
Margin   3.50%  
Floor   11.50%  
Ceiling   0.00%  
ETP   5.00%  
Maturity Date   Sep. 01, 2027  
Principal Amount   $ 5,000,000  
Investments at cost   4,757,000  
Investments at fair value   4,757,000  
Candesant Biomedical, Inc. [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Preferred Stock Warrants [Member]      
Investments at cost   152,000  
Investments at fair value   $ 135,000  
Number of Shares (in shares)   93,336  
Candesant Biomedical, Inc. [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Two [Member]      
Cash Rate 11.50% 12.00%  
Margin 3.50% 3.50%  
Floor 11.50% 11.50%  
Ceiling 0.00% 0.00%  
ETP 5.00% 5.00%  
Maturity Date Sep. 01, 2027 Sep. 01, 2027  
Principal Amount $ 2,500,000 $ 2,500,000  
Investments at cost 2,468,000 2,454,000  
Investments at fair value $ 2,468,000 $ 2,454,000  
Candesant Biomedical, Inc. [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Three [Member]      
Cash Rate 11.50% 12.00%  
Margin 3.50% 3.50%  
Floor 11.50% 11.50%  
Ceiling 0.00% 0.00%  
ETP 5.00% 5.00%  
Maturity Date Sep. 01, 2027 Sep. 01, 2027  
Principal Amount $ 2,500,000 $ 2,500,000  
Investments at cost 2,468,000 2,454,000  
Investments at fair value $ 2,468,000 $ 2,454,000  
VERO Biotech LLC [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, One [Member]      
Cash Rate   12.25%  
Margin   3.75%  
Floor   12.25%  
Ceiling   0.00%  
ETP   4.00%  
Maturity Date   Jan. 01, 2029  
Principal Amount   $ 15,000,000  
Investments at cost   14,675,000  
Investments at fair value   14,675,000  
VERO Biotech LLC [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Preferred Stock Warrants [Member]      
Investments at cost   432,000  
Investments at fair value   $ 379,000  
Number of Shares (in shares)   4,109  
VERO Biotech LLC [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Two [Member]      
Cash Rate   12.25%  
Margin   3.75%  
Floor   12.25%  
Ceiling   0.00%  
ETP   4.00%  
Maturity Date   Jan. 01, 2029  
Principal Amount   $ 10,000,000  
Investments at cost   9,784,000  
Investments at fair value   $ 9,784,000  
VERO Biotech LLC [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Three [Member]      
Cash Rate   12.25%  
Margin   3.75%  
Floor   12.25%  
Ceiling   0.00%  
ETP   4.00%  
Maturity Date   Jan. 01, 2029  
Principal Amount   $ 5,000,000  
Investments at cost   4,892,000  
Investments at fair value   $ 4,892,000  
VERO Biotech LLC [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, Four [Member]      
Cash Rate   12.25%  
Margin   3.75%  
Floor   12.25%  
Ceiling   0.00%  
ETP   4.00%  
Maturity Date   Jan. 01, 2029  
Principal Amount   $ 2,500,000  
Investments at cost   2,446,000  
Investments at fair value   $ 2,446,000  
Havenly, Inc. [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, One [Member]      
Cash Rate   13.50%  
Margin   5.00%  
Floor   5.00%  
Ceiling   0.00%  
ETP   4.00%  
Maturity Date   Mar. 01, 2027  
Principal Amount   $ 2,000,000  
Investments at cost   1,421,000  
Investments at fair value   $ 1,421,000  
Havenly, Inc. [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Two [Member]      
Cash Rate   13.50%  
Margin   5.00%  
Floor   5.00%  
Ceiling   0.00%  
ETP   4.00%  
Maturity Date   Mar. 01, 2027  
Principal Amount   $ 3,000,000  
Investments at cost   2,131,000  
Investments at fair value   2,131,000  
Havenly, Inc. [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member] | Common Stock Warrants [Member]      
Investments at cost   2,947,000  
Investments at fair value   $ 2,259,000  
Number of Shares (in shares)   1,312,500  
Havenly, Inc. [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Three [Member]      
Cash Rate   12.00%  
Margin   3.50%  
Floor   10.50%  
Ceiling   0.00%  
ETP   7.78%  
Maturity Date   Feb. 01, 2028  
Principal Amount   $ 2,813,000  
Investments at cost   2,813,000  
Investments at fair value   $ 2,813,000  
Havenly, Inc. [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, Four [Member]      
Cash Rate   12.00%  
Margin   3.50%  
Floor   10.50%  
Ceiling   0.00%  
ETP   7.78%  
Maturity Date   Feb. 01, 2028  
Principal Amount   $ 2,813,000  
Investments at cost   2,813,000  
Investments at fair value   $ 2,813,000  
Kodiak Robotics, Inc. [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, One [Member]      
Cash Rate   14.00%  
Margin   5.50%  
Floor   10.25%  
Ceiling   0.00%  
ETP   4.00%  
Maturity Date   Apr. 01, 2026  
Principal Amount   $ 10,000,000  
Investments at cost   9,895,000  
Investments at fair value   9,895,000  
Kodiak Robotics, Inc. [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member] | Preferred Stock Warrants [Member]      
Investments at cost   273,000  
Investments at fair value   $ 13,000  
Number of Shares (in shares)   639,918  
Kodiak Robotics, Inc. [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Two [Member]      
Cash Rate   14.00%  
Margin   5.50%  
Floor   10.25%  
Ceiling   0.00%  
ETP   4.00%  
Maturity Date   Apr. 01, 2026  
Principal Amount   $ 10,000,000  
Investments at cost   9,895,000  
Investments at fair value   $ 9,895,000  
Kodiak Robotics, Inc. [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Three [Member]      
Cash Rate   14.00%  
Margin   5.50%  
Floor   10.25%  
Ceiling   0.00%  
ETP   4.00%  
Maturity Date   Apr. 01, 2026  
Principal Amount   $ 5,000,000  
Investments at cost   4,947,000  
Investments at fair value   $ 4,947,000  
Kodiak Robotics, Inc. [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, Four [Member]      
Cash Rate   14.00%  
Margin   5.50%  
Floor   10.25%  
Ceiling   0.00%  
ETP   4.00%  
Maturity Date   Apr. 01, 2026  
Principal Amount   $ 5,000,000  
Investments at cost   4,947,000  
Investments at fair value   4,947,000  
BrightInsight, Inc. [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member] | Preferred Stock Warrants [Member]      
Investments at cost   167,000  
Investments at fair value   $ 0  
Number of Shares (in shares)   85,066  
BrightInsight, Inc. [Member] | Software, Healthcare Information and Service [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, One [Member]      
Cash Rate   14.00%  
Margin   5.50%  
Floor   9.50%  
Ceiling   0.00%  
ETP   3.00%  
Maturity Date   Aug. 01, 2027  
Principal Amount   $ 7,000,000  
Investments at cost   6,684,000  
Investments at fair value   $ 6,684,000  
BrightInsight, Inc. [Member] | Software, Healthcare Information and Service [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Two [Member]      
Cash Rate   14.00%  
Margin   5.50%  
Floor   9.50%  
Ceiling   0.00%  
ETP   3.00%  
Maturity Date   Aug. 01, 2027  
Principal Amount   $ 3,500,000  
Investments at cost   3,463,000  
Investments at fair value   $ 3,463,000  
BrightInsight, Inc. [Member] | Software, Healthcare Information and Service [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Three [Member]      
Cash Rate   14.00%  
Margin   5.50%  
Floor   9.50%  
Ceiling   0.00%  
ETP   3.00%  
Maturity Date   Aug. 01, 2027  
Principal Amount   $ 3,500,000  
Investments at cost   3,463,000  
Investments at fair value   $ 3,463,000  
BrightInsight, Inc. [Member] | Software, Healthcare Information and Service [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, Four [Member]      
Cash Rate   14.00%  
Margin   5.50%  
Floor   9.50%  
Ceiling   0.00%  
ETP   3.00%  
Maturity Date   Apr. 01, 2028  
Principal Amount   $ 2,750,000  
Investments at cost   2,710,000  
Investments at fair value   $ 2,710,000  
Robin Healthcare, Inc. [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, One [Member]      
Cash Rate   14.00%  
Margin   5.50%  
Floor   10.25%  
Ceiling   0.00%  
ETP   4.00%  
Maturity Date   Nov. 01, 2026  
Principal Amount   $ 3,500,000  
Investments at cost   3,469,000  
Investments at fair value   $ 1,574,000  
Robin Healthcare, Inc. [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Two [Member]      
Cash Rate   14.00%  
Margin   5.50%  
Floor   10.25%  
Ceiling   0.00%  
ETP   4.00%  
Maturity Date   Nov. 01, 2026  
Principal Amount   $ 3,500,000  
Investments at cost   3,563,000  
Investments at fair value   $ 1,617,000  
Axiom Space, Inc [Member] | Communications Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, One [Member]      
Cash Rate   14.50%  
Margin   6.00%  
Floor   9.25%  
Ceiling   0.00%  
ETP   2.50%  
Maturity Date   Jun. 01, 2026  
Principal Amount   $ 6,250,000  
Investments at cost   6,218,000  
Investments at fair value   $ 6,218,000  
Axiom Space, Inc [Member] | Communications Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Two [Member]      
Cash Rate   14.50%  
Margin   6.00%  
Floor   9.25%  
Ceiling   0.00%  
ETP   2.50%  
Maturity Date   Jun. 01, 2026  
Principal Amount   $ 6,250,000  
Investments at cost   6,218,000  
Investments at fair value   6,218,000  
Axiom Space, Inc [Member] | Communications Sector [Member] | Investment, Unaffiliated Issuer [Member] | Common Stock Warrants [Member]      
Investments at cost   47,000  
Investments at fair value   $ 61,000  
Number of Shares (in shares)   1,991  
Axiom Space, Inc [Member] | Communications Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Three [Member]      
Cash Rate   14.50%  
Margin   6.00%  
Floor   9.25%  
Ceiling   0.00%  
ETP   2.50%  
Maturity Date   Jun. 01, 2026  
Principal Amount   $ 6,250,000  
Investments at cost   6,218,000  
Investments at fair value   $ 6,218,000  
Parse Biosciences, Inc. [Member] | Diagnostics Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, One [Member]      
Cash Rate   11.75%  
Margin   3.25%  
Floor   11.50%  
Ceiling   0.00%  
ETP   5.00%  
Maturity Date   Jan. 01, 2028  
Principal Amount   $ 5,000,000  
Investments at cost   4,633,000  
Investments at fair value   4,633,000  
Parse Biosciences, Inc. [Member] | Diagnostics Sector [Member] | Investment, Unaffiliated Issuer [Member] | Preferred Stock Warrants [Member]      
Investments at cost   166,000  
Investments at fair value   $ 166,000  
Number of Shares (in shares)   184,253  
Parse Biosciences, Inc. [Member] | Diagnostics Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Two [Member]      
Cash Rate   11.75%  
Margin   3.25%  
Floor   11.50%  
Ceiling   0.00%  
ETP   5.00%  
Maturity Date   Jan. 01, 2028  
Principal Amount   $ 5,000,000  
Investments at cost   4,884,000  
Investments at fair value   4,884,000  
Parse Biosciences, Inc. [Member] | Diagnostics Sector [Member] | Investment, Unaffiliated Issuer [Member] | Common Stock Warrants [Member]      
Investments at cost   70,000  
Investments at fair value   $ 70,000  
Number of Shares (in shares)   32,244  
Avalo Therapeutics, Inc. [Member] | Biotechnology Sector [Member] | Investment, Unaffiliated Issuer [Member] | Common Stock Warrants [Member]      
Investments at cost   $ 311,000  
Investments at fair value   $ 0  
Number of Shares (in shares)   117  
Magnolia Medical Technologies, Inc [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Preferred Stock Warrants [Member]      
Investments at cost   $ 194,000  
Investments at fair value   $ 368,000  
Number of Shares (in shares)   809,931  
Noodle Partners, Inc. [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, One [Member]      
Cash Rate   13.50%  
Margin   5.00%  
Floor   12.00%  
Ceiling   0.00%  
ETP   3.00%  
Maturity Date   Mar. 01, 2027  
Principal Amount   $ 10,000,000  
Investments at cost   9,885,000  
Investments at fair value   9,885,000  
Noodle Partners, Inc. [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member] | Preferred Stock Warrants [Member]      
Investments at cost   115,000  
Investments at fair value   $ 2,000  
Number of Shares (in shares)   84,037  
Noodle Partners, Inc. [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Two [Member]      
Cash Rate   13.50%  
Margin   5.00%  
Floor   12.00%  
Ceiling   0.00%  
ETP   3.00%  
Maturity Date   Mar. 01, 2027  
Principal Amount   $ 5,000,000  
Investments at cost   4,942,000  
Investments at fair value   $ 4,942,000  
Noodle Partners, Inc. [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Three [Member]      
Cash Rate   13.50%  
Margin   5.00%  
Floor   12.00%  
Ceiling   0.00%  
ETP   3.00%  
Maturity Date   Mar. 01, 2027  
Principal Amount   $ 5,000,000  
Investments at cost   4,942,000  
Investments at fair value   4,942,000  
Meditrina, Inc [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Preferred Stock Warrants [Member]      
Investments at cost   83,000  
Investments at fair value   $ 93,000  
Number of Shares (in shares)   233,993  
Scientia Vascular, Inc. [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, One [Member]      
Cash Rate 12.50% 13.25%  
Margin 4.75% 4.75%  
Floor 8.50% 8.50%  
Ceiling 0.00% 0.00%  
ETP 5.00% 5.00%  
Maturity Date Jan. 01, 2027 Jan. 01, 2027  
Principal Amount $ 3,750,000 $ 3,750,000  
Investments at cost 3,735,000 3,722,000  
Investments at fair value $ 3,735,000 3,722,000  
Scientia Vascular, Inc. [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Preferred Stock Warrants [Member]      
Investments at cost   103,000  
Investments at fair value   $ 215,000  
Number of Shares (in shares)   34,410  
Scientia Vascular, Inc. [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Two [Member]      
Cash Rate 12.50% 13.25%  
Margin 4.75% 4.75%  
Floor 8.50% 8.50%  
Ceiling 0.00% 0.00%  
ETP 5.00% 5.00%  
Maturity Date Jan. 01, 2027 Jan. 01, 2027  
Principal Amount $ 3,750,000 $ 3,750,000  
Investments at cost 3,735,000 3,722,000  
Investments at fair value $ 3,735,000 $ 3,722,000  
Scientia Vascular, Inc. [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Three [Member]      
Cash Rate 13.00% 13.75%  
Margin 5.25% 5.25%  
Floor 9.00% 9.00%  
Ceiling 0.00% 0.00%  
ETP 5.00% 5.00%  
Maturity Date Jan. 01, 2027 Jan. 01, 2027  
Principal Amount $ 5,000,000 $ 5,000,000  
Investments at cost 4,964,000 4,943,000  
Investments at fair value $ 4,964,000 $ 4,943,000  
Scientia Vascular, Inc. [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, Four [Member]      
Cash Rate 13.00% 13.75%  
Margin 5.25% 5.25%  
Floor 9.00% 9.00%  
Ceiling 0.00% 0.00%  
ETP 5.00% 5.00%  
Maturity Date Jan. 01, 2027 Jan. 01, 2027  
Principal Amount $ 5,000,000 $ 5,000,000  
Investments at cost 4,937,000 4,900,000  
Investments at fair value 4,937,000 $ 4,900,000  
Engage3, LLC [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, One [Member]      
Cash Rate   14.75%  
Margin   6.25%  
Floor   9.75%  
Ceiling   0.00%  
ETP   4.50%  
Maturity Date   Jul. 01, 2027  
Principal Amount   $ 3,750,000  
Investments at cost   3,728,000  
Investments at fair value   $ 3,728,000  
Engage3, LLC [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Two [Member]      
Cash Rate   14.75%  
Margin   6.25%  
Floor   9.75%  
Ceiling   0.00%  
ETP   4.50%  
Maturity Date   Jul. 01, 2027  
Principal Amount   $ 3,750,000  
Investments at cost   3,728,000  
Investments at fair value   $ 3,728,000  
New Aerofarms, Inc. assignee of Aerofarms, Inc [Member] | Other Sustainability Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, One [Member]      
Cash Rate   15.25%  
Margin   6.75%  
Floor   10.00%  
Ceiling   0.00%  
ETP   4.33%  
Maturity Date   Dec. 01, 2026  
Principal Amount   $ 3,750,000  
Investments at cost   3,685,000  
Investments at fair value   3,685,000  
New Aerofarms, Inc. assignee of Aerofarms, Inc [Member] | Other Sustainability Sector [Member] | Investment, Unaffiliated Issuer [Member] | Preferred Stock Warrants [Member]      
Investments at cost   81,000  
Investments at fair value   $ 72,000  
Number of Shares (in shares)   400,000  
New Aerofarms, Inc. assignee of Aerofarms, Inc [Member] | Other Sustainability Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Two [Member]      
Cash Rate   15.25%  
Margin   6.75%  
Floor   10.00%  
Ceiling   0.00%  
ETP   4.33%  
Maturity Date   Dec. 01, 2026  
Principal Amount   $ 3,750,000  
Investments at cost   3,685,000  
Investments at fair value   3,685,000  
Kate Farms, Inc [Member] | Other Healthcare Sector [Member] | Investment, Unaffiliated Issuer [Member] | Preferred Stock Warrants [Member]      
Investments at cost   102,000  
Investments at fair value   $ 1,366,000  
Number of Shares (in shares)   82,965  
HIMV LLC [Member] | Investment, Affiliated Issuer, Controlled [Member]      
Investments at fair value $ 6,230,000 $ 6,230,000 0
Ceribell, Inc. [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, One [Member]      
Cash Rate 10.25% 12.00%  
Margin 2.75% 3.50%  
Floor 9.25% 8.25%  
Ceiling 0.00% 0.00%  
ETP 4.00% 5.50%  
Maturity Date Mar. 01, 2029 Oct. 01, 2024  
Principal Amount $ 5,000,000 $ 3,750,000  
Investments at cost 4,820,000 3,738,000  
Investments at fair value $ 4,820,000 3,738,000  
Ceribell, Inc. [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Preferred Stock Warrants [Member]      
Investments at cost   69,000  
Investments at fair value   $ 229,000  
Number of Shares (in shares)   145,483  
Ceribell, Inc. [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Two [Member]      
Cash Rate 10.25% 12.00%  
Margin 2.75% 3.50%  
Floor 9.25% 8.25%  
Ceiling 0.00% 0.00%  
ETP 4.00% 5.50%  
Maturity Date Mar. 01, 2029 Oct. 01, 2024  
Principal Amount $ 5,000,000 $ 3,750,000  
Investments at cost 4,941,000 3,738,000  
Investments at fair value $ 4,941,000 $ 3,738,000  
Ceribell, Inc. [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Three [Member]      
Cash Rate 10.25% 12.00%  
Margin 2.75% 3.50%  
Floor 9.25% 8.25%  
Ceiling 0.00% 0.00%  
ETP 4.00% 5.50%  
Maturity Date Mar. 01, 2029 Oct. 01, 2024  
Principal Amount $ 4,000,000 $ 1,875,000  
Investments at cost 3,952,000 1,866,000  
Investments at fair value $ 3,952,000 $ 1,866,000  
Ceribell, Inc. [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, Four [Member]      
Cash Rate   12.00%  
Margin   3.50%  
Floor   8.25%  
Ceiling   0.00%  
ETP   5.50%  
Maturity Date   Oct. 01, 2024  
Principal Amount   $ 1,875,000  
Investments at cost   1,866,000  
Investments at fair value   1,866,000  
Emalex Biosciences, Inc. [Member] | Biotechnology Sector [Member] | Investment, Unaffiliated Issuer [Member] | Preferred Stock Warrants [Member]      
Investments at cost   178,000  
Investments at fair value   $ 246,000  
Number of Shares (in shares)   110,402  
MicroTransponder, Inc. [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, One [Member]      
Cash Rate 12.25% 12.25%  
Margin 3.75% 3.75%  
Floor 12.25% 12.25%  
Ceiling 0.00% 0.00%  
ETP 3.50% 3.50%  
Maturity Date Jan. 01, 2029 Jan. 01, 2029  
Principal Amount $ 3,750,000 $ 3,750,000  
Investments at cost 3,699,000 3,689,000  
Investments at fair value $ 3,699,000 3,689,000  
MicroTransponder, Inc. [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Preferred Stock Warrants [Member]      
Investments at cost   47,000  
Investments at fair value   $ 47,000  
Number of Shares (in shares)   103,172  
MicroTransponder, Inc. [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Two [Member]      
Cash Rate 12.25% 12.25%  
Margin 3.75% 3.75%  
Floor 12.25% 12.25%  
Ceiling 0.00% 0.00%  
ETP 3.50% 3.50%  
Maturity Date Jan. 01, 2029 Jan. 01, 2029  
Principal Amount $ 3,750,000 $ 3,750,000  
Investments at cost 3,699,000 3,689,000  
Investments at fair value 3,699,000 3,689,000  
Revinate Holdings, Inc [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member] | Preferred Stock Warrants [Member]      
Investments at cost   44,000  
Investments at fair value   $ 91,000  
Number of Shares (in shares)   682,034  
Nexii Building Solutions, Inc [Member] | Investment, Affiliated Issuer, Controlled [Member]      
Investments at fair value $ 8,547,000 $ 0  
Nexii Building Solutions, Inc [Member] | Other Sustainability Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, One [Member]      
Cash Rate   15.50%  
Margin   7.00%  
Floor   10.25%  
Ceiling   0.00%  
ETP   2.50%  
Maturity Date   Mar. 31, 2024  
Principal Amount   $ 8,425,000  
Investments at cost   8,353,000  
Investments at fair value   $ 4,549,000  
Nexii Building Solutions, Inc [Member] | Other Sustainability Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Two [Member]      
Cash Rate   15.50%  
Margin   7.00%  
Floor   10.25%  
Ceiling   0.00%  
ETP   2.50%  
Maturity Date   Mar. 31, 2024  
Principal Amount   $ 8,425,000  
Investments at cost   8,229,000  
Investments at fair value   4,481,000  
Nexii Building Solutions, Inc [Member] | Other Sustainability Sector [Member] | Investment, Unaffiliated Issuer [Member] | Common Stock Warrants [Member]      
Investments at cost   490,000  
Investments at fair value   $ 0  
Number of Shares (in shares)   215,171  
Nexii Building Solutions, Inc [Member] | Other Sustainability Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Three [Member]      
Cash Rate   15.50%  
Margin   7.00%  
Floor   10.25%  
Ceiling   0.00%  
ETP   2.50%  
Maturity Date   Mar. 31, 2024  
Principal Amount   $ 8,425,000  
Investments at cost   8,229,000  
Investments at fair value   $ 4,481,000  
Nexii Building Solutions, Inc [Member] | Other Sustainability Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, Four [Member]      
Cash Rate   15.50%  
Margin   7.00%  
Floor   10.25%  
Ceiling   0.00%  
ETP   2.50%  
Maturity Date   Mar. 31, 2024  
Principal Amount   $ 5,617,000  
Investments at cost   5,480,000  
Investments at fair value   $ 2,984,000  
Nexii Building Solutions, Inc [Member] | Other Sustainability Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, Five [Member]      
Cash Rate   15.50%  
Margin   7.00%  
Floor   10.25%  
Ceiling   0.00%  
ETP   2.50%  
Maturity Date   Mar. 31, 2024  
Principal Amount   $ 5,617,000  
Investments at cost   5,480,000  
Investments at fair value   $ 2,984,000  
Nexii Building Solutions, Inc [Member] | Other Sustainability Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, Six [Member]      
Cash Rate   15.50%  
Margin   7.00%  
Floor   10.25%  
Ceiling   0.00%  
ETP   0.00%  
Maturity Date   Mar. 31, 2024  
Principal Amount   $ 735,000  
Investments at cost   726,000  
Investments at fair value   $ 395,000  
Nexii Building Solutions, Inc [Member] | Other Sustainability Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, Seven [Member]      
Cash Rate   15.50%  
Margin   7.00%  
Floor   10.25%  
Ceiling   0.00%  
ETP   0.00%  
Maturity Date   Mar. 31, 2024  
Principal Amount   $ 586,000  
Investments at cost   578,000  
Investments at fair value   $ 315,000  
Nexii Building Solutions, Inc [Member] | Other Sustainability Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, Eight [Member]      
Cash Rate   15.50%  
Margin   7.00%  
Floor   10.25%  
Ceiling   0.00%  
ETP   0.00%  
Maturity Date   Mar. 31, 2024  
Principal Amount   $ 292,000  
Investments at cost   288,000  
Investments at fair value   $ 157,000  
Nexii Building Solutions, Inc [Member] | Other Sustainability Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, Nine [Member]      
Cash Rate   15.50%  
Margin   7.00%  
Floor   10.25%  
Ceiling   0.00%  
ETP   0.00%  
Maturity Date   Mar. 31, 2024  
Principal Amount   $ 290,000  
Investments at cost   286,000  
Investments at fair value   $ 156,000  
Nexii Building Solutions, Inc [Member] | Other Sustainability Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, Ten [Member]      
Cash Rate   15.50%  
Margin   7.00%  
Floor   10.25%  
Ceiling   0.00%  
ETP   0.00%  
Maturity Date   Mar. 31, 2024  
Principal Amount   $ 174,000  
Investments at cost   172,000  
Investments at fair value   $ 93,000  
Nexii Building Solutions, Inc [Member] | Other Sustainability Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, Eleven [Member]      
Cash Rate   15.50%  
Margin   7.00%  
Floor   10.25%  
Ceiling   0.00%  
ETP   0.00%  
Maturity Date   Mar. 31, 2024  
Principal Amount   $ 802,000  
Investments at cost   791,000  
Investments at fair value   $ 431,000  
Nexii Building Solutions, Inc [Member] | Other Sustainability Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, Twelve [Member]      
Cash Rate   15.50%  
Margin   7.00%  
Floor   10.25%  
Ceiling   0.00%  
ETP   0.00%  
Maturity Date   Mar. 31, 2024  
Principal Amount   $ 1,091,000  
Investments at cost   1,083,000  
Investments at fair value   $ 590,000  
CAMP NYC, Inc [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, One [Member]      
Cash Rate   15.75%  
Margin   7.25%  
Floor   10.50%  
Ceiling   0.00%  
ETP   3.00%  
Maturity Date   May 01, 2026  
Principal Amount   $ 3,383,000  
Investments at cost   3,356,000  
Investments at fair value   3,356,000  
CAMP NYC, Inc [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member] | Preferred Stock Warrants [Member]      
Investments at cost   22,000  
Investments at fair value   $ 27,000  
Number of Shares (in shares)   75,997  
LiquiGlide, Inc [Member] | Other Sustainability Sector [Member] | Investment, Unaffiliated Issuer [Member] | Common Stock Warrants [Member]      
Investments at cost   $ 39,000  
Investments at fair value   $ 50,000  
Number of Shares (in shares)   61,359  
Lyrical Foods, Inc [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, One [Member]      
Cash Rate   12.00%  
Margin   3.50%  
Floor   9.00%  
Ceiling   0.00%  
ETP   1.00%  
Maturity Date   Sep. 01, 2027  
Principal Amount   $ 2,500,000  
Investments at cost   2,591,000  
Investments at fair value   $ 2,429,000  
Mirantis, Inc [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, One [Member]      
Cash Rate   12.00%  
Margin   3.50%  
Floor   11.75%  
Ceiling   0.00%  
ETP   4.00%  
Maturity Date   Oct. 01, 2028  
Principal Amount   $ 5,000,000  
Investments at cost   4,779,000  
Investments at fair value   $ 4,779,000  
Mirantis, Inc [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Two [Member]      
Cash Rate   12.00%  
Margin   3.50%  
Floor   11.75%  
Ceiling   0.00%  
ETP   4.00%  
Maturity Date   Oct. 01, 2028  
Principal Amount   $ 5,000,000  
Investments at cost   4,915,000  
Investments at fair value   4,915,000  
Mirantis, Inc [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member] | Common Stock Warrants [Member]      
Investments at cost   223,000  
Investments at fair value   $ 247,000  
Number of Shares (in shares)   948,275  
Mirantis, Inc [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Three [Member]      
Cash Rate   12.00%  
Margin   3.50%  
Floor   11.75%  
Ceiling   0.00%  
ETP   4.00%  
Maturity Date   Oct. 01, 2028  
Principal Amount   $ 5,000,000  
Investments at cost   4,915,000  
Investments at fair value   $ 4,915,000  
Mirantis, Inc [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, Four [Member]      
Cash Rate   12.00%  
Margin   3.50%  
Floor   11.75%  
Ceiling   0.00%  
ETP   4.00%  
Maturity Date   Oct. 01, 2028  
Principal Amount   $ 5,000,000  
Investments at cost   4,915,000  
Investments at fair value   4,915,000  
Imunon, Inc [Member] | Biotechnology Sector [Member] | Investment, Unaffiliated Issuer [Member] | Common Stock Warrants [Member]      
Investments at cost   65,000  
Investments at fair value   $ 0  
Number of Shares (in shares)   19,671  
Onkos Surgical, Inc. [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, One [Member]      
Cash Rate 10.75%    
Margin 3.25%    
Floor 10.75%    
Ceiling 0.00%    
ETP 4.00%    
Maturity Date Jan. 01, 2030    
Principal Amount $ 10,000,000    
Investments at cost 9,818,000    
Investments at fair value $ 9,818,000    
Onkos Surgical, Inc. [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Two [Member]      
Cash Rate 10.75%    
Margin 3.25%    
Floor 10.75%    
Ceiling 0.00%    
ETP 4.00%    
Maturity Date Jan. 01, 2030    
Principal Amount $ 10,000,000    
Investments at cost 9,845,000    
Investments at fair value $ 9,845,000    
Onkos Surgical, Inc. [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Three [Member]      
Cash Rate 10.75%    
Margin 3.25%    
Floor 10.75%    
Ceiling 0.00%    
ETP 4.00%    
Maturity Date Jan. 01, 2030    
Principal Amount $ 5,000,000    
Investments at cost 4,923,000    
Investments at fair value $ 4,923,000    
Onkos Surgical, Inc. [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, Four [Member]      
Cash Rate 10.75%    
Margin 3.25%    
Floor 10.75%    
Ceiling 0.00%    
ETP 4.00%    
Maturity Date Jan. 01, 2030    
Principal Amount $ 5,000,000    
Investments at cost 4,923,000    
Investments at fair value 4,923,000    
SIGNiX, Inc [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member] | Preferred Stock Warrants [Member]      
Investments at cost   $ 225,000  
Investments at fair value   $ 0  
Number of Shares (in shares)   186,235  
Clara Foods Co [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, One [Member]      
Cash Rate   14.25%  
Margin   5.75%  
Floor   9.00%  
Ceiling   0.00%  
ETP   5.50%  
Maturity Date   Aug. 01, 2025  
Principal Amount   $ 1,667,000  
Investments at cost   1,656,000  
Investments at fair value   1,656,000  
Clara Foods Co [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member] | Preferred Stock Warrants [Member]      
Investments at cost   29,000  
Investments at fair value   $ 122,000  
Number of Shares (in shares)   46,745  
Clara Foods Co [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Two [Member]      
Cash Rate   14.25%  
Margin   5.75%  
Floor   9.00%  
Ceiling   0.00%  
ETP   5.50%  
Maturity Date   Aug. 01, 2025  
Principal Amount   $ 1,583,000  
Investments at cost   1,573,000  
Investments at fair value   1,573,000  
Elligo Health Research, Inc [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member] | Preferred Stock Warrants [Member]      
Investments at cost   192,000  
Investments at fair value   $ 99,000  
Number of Shares (in shares)   652,250  
Elligo Health Research, Inc [Member] | Software, Healthcare Information and Service [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, One [Member]      
Cash Rate   12.00%  
Margin   3.50%  
Floor   11.75%  
Ceiling   0.00%  
ETP   4.00%  
Maturity Date   Oct. 01, 2027  
Principal Amount   $ 10,000,000  
Investments at cost   9,656,000  
Investments at fair value   $ 9,656,000  
Elligo Health Research, Inc [Member] | Software, Healthcare Information and Service [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Two [Member]      
Cash Rate   12.00%  
Margin   3.50%  
Floor   11.75%  
Ceiling   0.00%  
ETP   4.00%  
Maturity Date   Oct. 01, 2027  
Principal Amount   $ 5,000,000  
Investments at cost   4,925,000  
Investments at fair value   $ 4,925,000  
Elligo Health Research, Inc [Member] | Software, Healthcare Information and Service [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Three [Member]      
Cash Rate   12.00%  
Margin   3.50%  
Floor   11.75%  
Ceiling   0.00%  
ETP   4.00%  
Maturity Date   Oct. 01, 2027  
Principal Amount   $ 5,000,000  
Investments at cost   4,925,000  
Investments at fair value   $ 4,925,000  
Elligo Health Research, Inc [Member] | Software, Healthcare Information and Service [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, Four [Member]      
Cash Rate   12.00%  
Margin   3.50%  
Floor   11.75%  
Ceiling   0.00%  
ETP   4.00%  
Maturity Date   Oct. 01, 2027  
Principal Amount   $ 5,000,000  
Investments at cost   4,925,000  
Investments at fair value   $ 4,925,000  
NextCar Holding Company, Inc [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, One [Member]      
Cash Rate   14.25%  
Margin   5.75%  
Floor   9.00%  
Ceiling   0.00%  
ETP   5.25%  
Maturity Date   Oct. 31, 2023  
Principal Amount   $ 5,752,000  
Investments at cost   5,752,000  
Investments at fair value   5,018,000  
NextCar Holding Company, Inc [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member] | Preferred Stock Warrants [Member]      
Investments at cost   9,000  
Investments at fair value   $ 0  
Number of Shares (in shares)   1,224,752  
NextCar Holding Company, Inc [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Two [Member]      
Cash Rate   14.25%  
Margin   5.75%  
Floor   9.00%  
Ceiling   0.00%  
ETP   5.25%  
Maturity Date   Oct. 31, 2023  
Principal Amount   $ 2,301,000  
Investments at cost   2,301,000  
Investments at fair value   2,007,000  
NextCar Holding Company, Inc [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member] | Common Stock Warrants [Member]      
Investments at cost   188,000  
Investments at fair value   $ 0  
Number of Shares (in shares)   12,618  
NextCar Holding Company, Inc [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Three [Member]      
Cash Rate   14.25%  
Margin   5.75%  
Floor   9.00%  
Ceiling   0.00%  
ETP   5.25%  
Maturity Date   Oct. 31, 2023  
Principal Amount   $ 2,876,000  
Investments at cost   2,876,000  
Investments at fair value   $ 2,509,000  
NextCar Holding Company, Inc [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, Four [Member]      
Cash Rate   14.25%  
Margin   5.75%  
Floor   9.00%  
Ceiling   0.00%  
ETP   5.25%  
Maturity Date   Oct. 31, 2023  
Principal Amount   $ 3,451,000  
Investments at cost   3,451,000  
Investments at fair value   $ 3,011,000  
NextCar Holding Company, Inc [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, Five [Member]      
Cash Rate   14.25%  
Margin   5.75%  
Floor   9.00%  
Ceiling   0.00%  
ETP   5.25%  
Maturity Date   Oct. 31, 2023  
Principal Amount   $ 2,876,000  
Investments at cost   2,876,000  
Investments at fair value   $ 2,510,000  
NextCar Holding Company, Inc [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, Six [Member]      
Cash Rate   14.25%  
Margin   5.75%  
Floor   9.00%  
Ceiling   0.00%  
ETP   5.25%  
Maturity Date   Oct. 31, 2023  
Principal Amount   $ 2,876,000  
Investments at cost   2,876,000  
Investments at fair value   $ 2,510,000  
NextCar Holding Company, Inc [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, Seven [Member]      
Cash Rate   14.25%  
Margin   5.75%  
Floor   9.00%  
Ceiling   0.00%  
ETP   5.25%  
Maturity Date   Oct. 31, 2023  
Principal Amount   $ 5,752,000  
Investments at cost   5,752,000  
Investments at fair value   $ 5,018,000  
NextCar Holding Company, Inc [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, Eight [Member]      
Cash Rate   14.25%  
Margin   5.75%  
Floor   9.00%  
Ceiling   0.00%  
ETP   5.25%  
Maturity Date   Oct. 31, 2023  
Principal Amount   $ 2,876,000  
Investments at cost   2,876,000  
Investments at fair value   2,510,000  
KSQ Therapeutics, Inc. [Member] | Biotechnology Sector [Member] | Investment, Unaffiliated Issuer [Member] | Preferred Stock Warrants [Member]      
Investments at cost   50,000  
Investments at fair value   $ 53,000  
Number of Shares (in shares)   48,076  
Slingshot Aerospace, Inc. [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, One [Member]      
Cash Rate   14.25%  
Margin   5.75%  
Floor   9.75%  
Ceiling   0.00%  
ETP   5.00%  
Maturity Date   Aug. 01, 2026  
Principal Amount   $ 5,000,000  
Investments at cost   4,959,000  
Investments at fair value   4,959,000  
Slingshot Aerospace, Inc. [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member] | Preferred Stock Warrants [Member]      
Investments at cost   123,000  
Investments at fair value   $ 135,000  
Number of Shares (in shares)   309,208  
Slingshot Aerospace, Inc. [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Two [Member]      
Cash Rate   14.25%  
Margin   5.75%  
Floor   9.75%  
Ceiling   0.00%  
ETP   5.00%  
Maturity Date   Aug. 01, 2026  
Principal Amount   $ 5,000,000  
Investments at cost   4,959,000  
Investments at fair value   $ 4,959,000  
Slingshot Aerospace, Inc. [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Three [Member]      
Cash Rate   14.25%  
Margin   5.75%  
Floor   9.75%  
Ceiling   0.00%  
ETP   5.00%  
Maturity Date   Aug. 01, 2026  
Principal Amount   $ 5,000,000  
Investments at cost   4,959,000  
Investments at fair value   $ 4,959,000  
Slingshot Aerospace, Inc. [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, Four [Member]      
Cash Rate   14.25%  
Margin   5.75%  
Floor   9.75%  
Ceiling   0.00%  
ETP   5.00%  
Maturity Date   Aug. 01, 2026  
Principal Amount   $ 5,000,000  
Investments at cost   4,959,000  
Investments at fair value   4,959,000  
Swift Health Systems Inc. [Member] | Investment, Affiliated Issuer, Controlled [Member]      
Investments at fair value $ 17,042,000 $ 0  
Swift Health Systems Inc. [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, One [Member]      
Cash Rate   13.75%  
Margin   5.25%  
Floor   9.00%  
Ceiling   0.00%  
ETP   5.00%  
Maturity Date   Jul. 01, 2027  
Principal Amount   $ 3,500,000  
Investments at cost   3,467,000  
Investments at fair value   3,467,000  
Swift Health Systems Inc. [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Preferred Stock Warrants [Member]      
Investments at cost   71,000  
Investments at fair value   $ 1,000  
Number of Shares (in shares)   135,484  
Swift Health Systems Inc. [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Two [Member]      
Cash Rate   13.75%  
Margin   5.25%  
Floor   9.00%  
Ceiling   0.00%  
ETP   5.00%  
Maturity Date   Jul. 01, 2027  
Principal Amount   $ 3,500,000  
Investments at cost   3,467,000  
Investments at fair value   $ 3,467,000  
Swift Health Systems Inc. [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Three [Member]      
Cash Rate   13.75%  
Margin   5.25%  
Floor   9.00%  
Ceiling   0.00%  
ETP   5.00%  
Maturity Date   Jul. 01, 2027  
Principal Amount   $ 3,500,000  
Investments at cost   3,456,000  
Investments at fair value   $ 3,456,000  
Swift Health Systems Inc. [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, Four [Member]      
Cash Rate   13.75%  
Margin   5.25%  
Floor   9.00%  
Ceiling   0.00%  
ETP   5.00%  
Maturity Date   Jul. 01, 2027  
Principal Amount   $ 3,500,000  
Investments at cost   3,456,000  
Investments at fair value   $ 3,456,000  
Soli Organic, Inc [Member] | Other Sustainability Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, One [Member]      
Cash Rate   15.25%  
Margin   6.75%  
Floor   10.00%  
Ceiling   0.00%  
ETP   2.75%  
Maturity Date   Apr. 01, 2026  
Principal Amount   $ 5,000,000  
Investments at cost   4,959,000  
Investments at fair value   4,959,000  
Soli Organic, Inc [Member] | Other Sustainability Sector [Member] | Investment, Unaffiliated Issuer [Member] | Preferred Stock Warrants [Member]      
Investments at cost   214,000  
Investments at fair value   $ 340,000  
Number of Shares (in shares)   681  
Soli Organic, Inc [Member] | Other Sustainability Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Two [Member]      
Cash Rate   15.25%  
Margin   6.75%  
Floor   10.00%  
Ceiling   0.00%  
ETP   2.75%  
Maturity Date   Apr. 01, 2026  
Principal Amount   $ 2,500,000  
Investments at cost   2,479,000  
Investments at fair value   $ 2,479,000  
Soli Organic, Inc [Member] | Other Sustainability Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Three [Member]      
Cash Rate   15.25%  
Margin   6.75%  
Floor   10.00%  
Ceiling   0.00%  
ETP   2.75%  
Maturity Date   May 01, 2026  
Principal Amount   $ 5,000,000  
Investments at cost   4,956,000  
Investments at fair value   $ 4,956,000  
Soli Organic, Inc [Member] | Other Sustainability Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, Four [Member]      
Cash Rate   15.25%  
Margin   6.75%  
Floor   10.00%  
Ceiling   0.00%  
ETP   2.75%  
Maturity Date   May 01, 2026  
Principal Amount   $ 2,500,000  
Investments at cost   2,478,000  
Investments at fair value   $ 2,478,000  
Soli Organic, Inc [Member] | Other Sustainability Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, Five [Member]      
Cash Rate   14.00%  
Margin   5.50%  
Floor   11.75%  
Ceiling   0.00%  
ETP   2.75%  
Maturity Date   Dec. 01, 2026  
Principal Amount   $ 5,000,000  
Investments at cost   4,934,000  
Investments at fair value   $ 4,934,000  
Soli Organic, Inc [Member] | Other Sustainability Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, Six [Member]      
Cash Rate   14.00%  
Margin   5.50%  
Floor   11.75%  
Ceiling   0.00%  
ETP   2.75%  
Maturity Date   Dec. 01, 2026  
Principal Amount   $ 2,500,000  
Investments at cost   2,467,000  
Investments at fair value   2,467,000  
Medsphere Systems Corporation [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member] | Preferred Stock Warrants [Member]      
Investments at cost   60,000  
Investments at fair value   $ 108,000  
Number of Shares (in shares)   7,097,792  
Conventus Orthopaedics, Inc [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, One [Member]      
Cash Rate 12.32% 13.32%  
Margin 4.82% 4.82%  
Floor 9.25% 9.25%  
Ceiling 0.00% 0.00%  
ETP 10.36% 10.36%  
Maturity Date Jul. 01, 2025 Jul. 01, 2025  
Principal Amount $ 3,187,000 $ 3,960,000  
Investments at cost 3,168,000 3,923,000  
Investments at fair value $ 3,168,000 3,923,000  
Conventus Orthopaedics, Inc [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Preferred Stock Warrants [Member]      
Investments at cost   221,000  
Investments at fair value   $ 206,000  
Number of Shares (in shares)   7,972,222  
Conventus Orthopaedics, Inc [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Two [Member]      
Cash Rate 12.32% 13.32%  
Margin 4.82% 4.82%  
Floor 9.25% 9.25%  
Ceiling 0.00% 0.00%  
ETP 10.36% 10.36%  
Maturity Date Jul. 01, 2025 Jul. 01, 2025  
Principal Amount $ 3,187,000 $ 3,960,000  
Investments at cost 3,168,000 3,923,000  
Investments at fair value $ 3,168,000 3,923,000  
Mustang Bio, Inc [Member] | Biotechnology Sector [Member] | Investment, Unaffiliated Issuer [Member] | Common Stock Warrants [Member]      
Investments at cost   146,000  
Investments at fair value   $ 0  
Number of Shares (in shares)   16,611  
Sonex Health, Inc. [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, One [Member]      
Cash Rate 11.75% 12.00%  
Margin 3.50% 3.50%  
Floor 11.75% 11.75%  
Ceiling 0.00% 0.00%  
ETP 8.00% 8.00%  
Maturity Date Sep. 01, 2027 Sep. 01, 2027  
Principal Amount $ 2,500,000 $ 2,500,000  
Investments at cost 2,480,000 2,297,000  
Investments at fair value $ 2,480,000 2,297,000  
Sonex Health, Inc. [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Preferred Stock Warrants [Member]      
Investments at cost   275,000  
Investments at fair value   $ 269,000  
Number of Shares (in shares)   2,637,043  
Sonex Health, Inc. [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Two [Member]      
Cash Rate 11.75% 12.00%  
Margin 3.50% 3.50%  
Floor 11.75% 11.75%  
Ceiling 0.00% 0.00%  
ETP 8.00% 8.00%  
Maturity Date Sep. 01, 2027 Sep. 01, 2027  
Principal Amount $ 2,500,000 $ 2,500,000  
Investments at cost 2,480,000 2,473,000  
Investments at fair value $ 2,480,000 $ 2,473,000  
Sonex Health, Inc. [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Three [Member]      
Cash Rate 11.75% 12.00%  
Margin 3.50% 3.50%  
Floor 11.75% 11.75%  
Ceiling 0.00% 0.00%  
ETP 8.00% 8.00%  
Maturity Date Sep. 01, 2027 Sep. 01, 2027  
Principal Amount $ 5,000,000 $ 5,000,000  
Investments at cost 4,961,000 4,946,000  
Investments at fair value $ 4,961,000 $ 4,946,000  
Sonex Health, Inc. [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, Four [Member]      
Cash Rate 11.75% 12.00%  
Margin 3.50% 3.50%  
Floor 11.75% 11.75%  
Ceiling 0.00% 0.00%  
ETP 8.00% 8.00%  
Maturity Date Sep. 01, 2027 Sep. 01, 2027  
Principal Amount $ 5,000,000 $ 5,000,000  
Investments at cost 4,961,000 4,946,000  
Investments at fair value $ 4,961,000 $ 4,946,000  
Sonex Health, Inc. [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, Five [Member]      
Cash Rate 11.75%    
Margin 3.50%    
Floor 11.75%    
Ceiling 0.00%    
ETP 8.00%    
Maturity Date Apr. 01, 2028    
Principal Amount $ 3,750,000    
Investments at cost 3,714,000    
Investments at fair value $ 3,714,000    
Sonex Health, Inc. [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, Six [Member]      
Cash Rate 11.75%    
Margin 3.50%    
Floor 11.75%    
Ceiling 0.00%    
ETP 8.00%    
Maturity Date Apr. 01, 2028    
Principal Amount $ 3,750,000    
Investments at cost 3,714,000    
Investments at fair value $ 3,714,000    
Sonex Health, Inc. [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, Seven [Member]      
Cash Rate 11.75%    
Margin 3.50%    
Floor 11.75%    
Ceiling 0.00%    
ETP 8.00%    
Maturity Date Apr. 01, 2028    
Principal Amount $ 3,750,000    
Investments at cost 3,714,000    
Investments at fair value $ 3,714,000    
Sonex Health, Inc. [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, Eight [Member]      
Cash Rate 11.75%    
Margin 3.50%    
Floor 11.75%    
Ceiling 0.00%    
ETP 8.00%    
Maturity Date Apr. 01, 2028    
Principal Amount $ 3,750,000    
Investments at cost 3,714,000    
Investments at fair value $ 3,714,000    
Divergent Technologies, Inc. [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, One [Member]      
Cash Rate   11.25%  
Margin   6.00%  
Floor   9.50%  
Ceiling   11.25%  
ETP   3.00%  
Maturity Date   Jul. 01, 2027  
Principal Amount   $ 3,750,000  
Investments at cost   3,608,000  
Investments at fair value   3,608,000  
Divergent Technologies, Inc. [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member] | Preferred Stock Warrants [Member]      
Investments at cost   94,000  
Investments at fair value   $ 250,000  
Number of Shares (in shares)   37,282  
Divergent Technologies, Inc. [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Two [Member]      
Cash Rate   11.25%  
Margin   6.00%  
Floor   9.50%  
Ceiling   11.25%  
ETP   3.00%  
Maturity Date   Jul. 01, 2027  
Principal Amount   $ 1,250,000  
Investments at cost   1,242,000  
Investments at fair value   $ 1,242,000  
Divergent Technologies, Inc. [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Three [Member]      
Cash Rate   11.25%  
Margin   6.00%  
Floor   9.50%  
Ceiling   11.25%  
ETP   3.00%  
Maturity Date   Jul. 01, 2027  
Principal Amount   $ 3,750,000  
Investments at cost   3,726,000  
Investments at fair value   $ 3,726,000  
Divergent Technologies, Inc. [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, Four [Member]      
Cash Rate   11.25%  
Margin   6.00%  
Floor   9.50%  
Ceiling   11.25%  
ETP   3.00%  
Maturity Date   Jul. 01, 2027  
Principal Amount   $ 1,250,000  
Investments at cost   1,242,000  
Investments at fair value   $ 1,242,000  
Divergent Technologies, Inc. [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, Five [Member]      
Cash Rate   11.25%  
Margin   6.00%  
Floor   9.50%  
Ceiling   11.25%  
ETP   3.00%  
Maturity Date   Jul. 01, 2027  
Principal Amount   $ 3,750,000  
Investments at cost   3,726,000  
Investments at fair value   $ 3,726,000  
Divergent Technologies, Inc. [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, Six [Member]      
Cash Rate   11.25%  
Margin   6.00%  
Floor   9.50%  
Ceiling   11.25%  
ETP   3.00%  
Maturity Date   Jul. 01, 2027  
Principal Amount   $ 1,250,000  
Investments at cost   1,242,000  
Investments at fair value   $ 1,242,000  
Divergent Technologies, Inc. [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, Seven [Member]      
Cash Rate   11.25%  
Margin   6.00%  
Floor   9.50%  
Ceiling   11.25%  
ETP   3.00%  
Maturity Date   Jan. 01, 2028  
Principal Amount   $ 3,750,000  
Investments at cost   3,712,000  
Investments at fair value   $ 3,712,000  
Divergent Technologies, Inc. [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, Eight [Member]      
Cash Rate   11.25%  
Margin   6.00%  
Floor   9.50%  
Ceiling   11.25%  
ETP   3.00%  
Maturity Date   Jan. 01, 2028  
Principal Amount   $ 3,750,000  
Investments at cost   3,712,000  
Investments at fair value   $ 3,712,000  
Divergent Technologies, Inc. [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, Nine [Member]      
Cash Rate   11.25%  
Margin   6.00%  
Floor   9.50%  
Ceiling   11.25%  
ETP   3.00%  
Maturity Date   Apr. 01, 2028  
Principal Amount   $ 3,750,000  
Investments at cost   3,706,000  
Investments at fair value   $ 3,706,000  
Divergent Technologies, Inc. [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, Ten [Member]      
Cash Rate   11.25%  
Margin   6.00%  
Floor   9.50%  
Ceiling   11.25%  
ETP   3.00%  
Maturity Date   Jul. 01, 2028  
Principal Amount   $ 3,750,000  
Investments at cost   3,707,000  
Investments at fair value   $ 3,707,000  
Divergent Technologies, Inc. [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, Eleven [Member]      
Cash Rate   11.25%  
Margin   6.00%  
Floor   9.50%  
Ceiling   11.25%  
ETP   3.00%  
Maturity Date   Jul. 01, 2028  
Principal Amount   $ 3,750,000  
Investments at cost   3,707,000  
Investments at fair value   $ 3,707,000  
Temperpack Technologies, Inc [Member] | Other Sustainability Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, One [Member]      
Cash Rate   15.25%  
Margin   6.75%  
Floor   10.00%  
Ceiling   0.00%  
ETP   2.50%  
Maturity Date   Apr. 01, 2028  
Principal Amount   $ 3,750,000  
Investments at cost   3,694,000  
Investments at fair value   3,694,000  
Temperpack Technologies, Inc [Member] | Other Sustainability Sector [Member] | Investment, Unaffiliated Issuer [Member] | Preferred Stock Warrants [Member]      
Investments at cost   175,000  
Investments at fair value   $ 80,000  
Number of Shares (in shares)   46,311  
Temperpack Technologies, Inc [Member] | Other Sustainability Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Two [Member]      
Cash Rate   15.25%  
Margin   6.75%  
Floor   10.00%  
Ceiling   0.00%  
ETP   2.50%  
Maturity Date   Apr. 01, 2028  
Principal Amount   $ 3,750,000  
Investments at cost   3,694,000  
Investments at fair value   $ 3,694,000  
Temperpack Technologies, Inc [Member] | Other Sustainability Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Three [Member]      
Cash Rate   15.25%  
Margin   6.75%  
Floor   10.00%  
Ceiling   0.00%  
ETP   2.50%  
Maturity Date   Apr. 01, 2028  
Principal Amount   $ 7,500,000  
Investments at cost   7,379,000  
Investments at fair value   $ 7,379,000  
Temperpack Technologies, Inc [Member] | Other Sustainability Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, Four [Member]      
Cash Rate   15.25%  
Margin   6.75%  
Floor   10.00%  
Ceiling   0.00%  
ETP   2.50%  
Maturity Date   Apr. 01, 2028  
Principal Amount   $ 3,750,000  
Investments at cost   3,690,000  
Investments at fair value   $ 3,690,000  
Temperpack Technologies, Inc [Member] | Other Sustainability Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, Five [Member]      
Cash Rate   15.25%  
Margin   6.75%  
Floor   10.00%  
Ceiling   0.00%  
ETP   2.50%  
Maturity Date   Apr. 01, 2028  
Principal Amount   $ 3,750,000  
Investments at cost   3,690,000  
Investments at fair value   $ 3,690,000  
Temperpack Technologies, Inc [Member] | Other Sustainability Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, Six [Member]      
Cash Rate   14.50%  
Margin   6.00%  
Floor   10.00%  
Ceiling   0.00%  
ETP   2.00%  
Maturity Date   Jan. 01, 2029  
Principal Amount   $ 4,500,000  
Investments at cost   4,446,000  
Investments at fair value   $ 4,446,000  
Temperpack Technologies, Inc [Member] | Other Sustainability Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, Seven [Member]      
Cash Rate   14.50%  
Margin   6.00%  
Floor   10.00%  
Ceiling   0.00%  
ETP   2.00%  
Maturity Date   Jan. 01, 2029  
Principal Amount   $ 2,000,000  
Investments at cost   1,976,000  
Investments at fair value   1,976,000  
SafelyYou, Inc [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member] | Preferred Stock Warrants [Member]      
Investments at cost   163,000  
Investments at fair value   $ 50,000  
Number of Shares (in shares)   150,353  
SafelyYou, Inc [Member] | Software, Healthcare Information and Service [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, One [Member]      
Cash Rate   11.75%  
Margin   3.25%  
Floor   11.00%  
Ceiling   0.00%  
ETP   5.00%  
Maturity Date   Jun. 01, 2027  
Principal Amount   $ 5,000,000  
Investments at cost   4,648,000  
Investments at fair value   $ 4,648,000  
SafelyYou, Inc [Member] | Software, Healthcare Information and Service [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Two [Member]      
Cash Rate   11.75%  
Margin   3.25%  
Floor   11.00%  
Ceiling   0.00%  
ETP   5.00%  
Maturity Date   Jun. 01, 2027  
Principal Amount   $ 5,000,000  
Investments at cost   4,918,000  
Investments at fair value   4,918,000  
Native Microbials, Inc. [Member] | Biotechnology Sector [Member] | Investment, Unaffiliated Issuer [Member] | Preferred Stock Warrants [Member]      
Investments at cost   64,000  
Investments at fair value   $ 157,000  
Number of Shares (in shares)   103,679  
Topia Mobility, Inc [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member] | Preferred Stock Warrants [Member]      
Investments at cost   $ 138,000  
Investments at fair value   $ 0  
Number of Shares (in shares)   3,049,607  
InfoBionic, Inc [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, One [Member]      
Cash Rate 12.25%    
Margin 4.50%    
Floor 12.00%    
Ceiling 0.00%    
ETP 2.00%    
Maturity Date Sep. 01, 2029    
Principal Amount $ 5,000,000    
Investments at cost 4,920,000    
Investments at fair value $ 4,920,000    
InfoBionic, Inc [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Preferred Stock Warrants [Member]      
Investments at cost   $ 124,000  
Investments at fair value   $ 26,000  
Number of Shares (in shares)   2,010,424  
InfoBionic, Inc [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Two [Member]      
Cash Rate 12.25%    
Margin 4.50%    
Floor 12.00%    
Ceiling 0.00%    
ETP 2.00%    
Maturity Date Sep. 01, 2029    
Principal Amount $ 5,000,000    
Investments at cost 4,920,000    
Investments at fair value $ 4,920,000    
InfoBionic, Inc [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Three [Member]      
Cash Rate 12.25%    
Margin 4.50%    
Floor 12.00%    
Ceiling 0.00%    
ETP 2.00%    
Maturity Date Sep. 01, 2029    
Principal Amount $ 5,000,000    
Investments at cost 4,920,000    
Investments at fair value $ 4,920,000    
PDS Biotechnology Corporation [Member] | Biotechnology Sector [Member] | Investment, Unaffiliated Issuer [Member] | Common Stock Warrants [Member]      
Investments at cost   $ 160,000  
Investments at fair value   $ 606,000  
Number of Shares (in shares)   299,848  
Spineology, Inc [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, One [Member]      
Cash Rate 12.50% 15.50%  
Margin 5.00% 7.00%  
Floor 12.00% 10.25%  
Ceiling 0.00% 0.00%  
ETP 1.00% 1.00%  
Maturity Date Aug. 01, 2029 Oct. 01, 2025  
Principal Amount $ 5,000,000 $ 5,000,000  
Investments at cost 4,916,000 4,978,000  
Investments at fair value $ 4,916,000 $ 4,978,000  
Spineology, Inc [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Two [Member]      
Cash Rate 12.50% 15.50%  
Margin 5.00% 7.00%  
Floor 12.00% 10.25%  
Ceiling 0.00% 0.00%  
ETP 1.00% 1.00%  
Maturity Date Aug. 01, 2029 Apr. 01, 2026  
Principal Amount $ 4,250,000 $ 2,500,000  
Investments at cost 4,178,000 2,489,000  
Investments at fair value $ 4,178,000 $ 2,489,000  
Spineology, Inc [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Three [Member]      
Cash Rate 12.50%    
Margin 5.00%    
Floor 12.00%    
Ceiling 0.00%    
ETP 1.00%    
Maturity Date Aug. 01, 2029    
Principal Amount $ 4,250,000    
Investments at cost 4,178,000    
Investments at fair value $ 4,178,000    
Spineology, Inc [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, Four [Member]      
Cash Rate 12.50%    
Margin 5.00%    
Floor 12.00%    
Ceiling 0.00%    
ETP 1.00%    
Maturity Date Aug. 01, 2029    
Principal Amount $ 2,500,000    
Investments at cost 2,458,000    
Investments at fair value 2,458,000    
Lemongrass Holdings, Inc [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, One [Member]      
Cash Rate   15.00%  
Margin   6.50%  
Floor   9.75%  
Ceiling   0.00%  
ETP   2.50%  
Maturity Date   Mar. 01, 2026  
Principal Amount   $ 5,000,000  
Investments at cost   4,971,000  
Investments at fair value   4,971,000  
Lemongrass Holdings, Inc [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member] | Preferred Stock Warrants [Member]      
Investments at cost   32,000  
Investments at fair value   $ 120,000  
Number of Shares (in shares)   101,308  
Lemongrass Holdings, Inc [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Two [Member]      
Cash Rate   15.00%  
Margin   6.50%  
Floor   9.75%  
Ceiling   0.00%  
ETP   2.50%  
Maturity Date   Mar. 01, 2026  
Principal Amount   $ 2,500,000  
Investments at cost   2,486,000  
Investments at fair value   2,486,000  
Provivi, Inc. [Member] | Biotechnology Sector [Member] | Investment, Unaffiliated Issuer [Member] | Preferred Stock Warrants [Member]      
Investments at cost   312,000  
Investments at fair value   $ 225,000  
Number of Shares (in shares)   691,895  
Provivi, Inc. [Member] | Biotechnology Sector [Member] | Investment, Unaffiliated Issuer [Member] | Common Stock Warrants [Member]      
Investments at cost   $ 278,000  
Investments at fair value   $ 0  
Number of Shares (in shares)   175,098  
Viken Detection Corporation [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, One [Member]      
Cash Rate   12.50%  
Margin   4.00%  
Floor   11.75%  
Ceiling   0.00%  
ETP   3.50%  
Maturity Date   Jun. 01, 2027  
Principal Amount   $ 5,000,000  
Investments at cost   4,773,000  
Investments at fair value   4,773,000  
Viken Detection Corporation [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member] | Preferred Stock Warrants [Member]      
Investments at cost   120,000  
Investments at fair value   $ 105,000  
Number of Shares (in shares)   345,443  
Viken Detection Corporation [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Two [Member]      
Cash Rate   12.50%  
Margin   4.00%  
Floor   11.75%  
Ceiling   0.00%  
ETP   3.50%  
Maturity Date   Jun. 01, 2027  
Principal Amount   $ 2,500,000  
Investments at cost   2,467,000  
Investments at fair value   $ 2,467,000  
Viken Detection Corporation [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Three [Member]      
Cash Rate   12.50%  
Margin   4.00%  
Floor   11.75%  
Ceiling   0.00%  
ETP   3.50%  
Maturity Date   Jun. 01, 2027  
Principal Amount   $ 2,500,000  
Investments at cost   2,467,000  
Investments at fair value   2,467,000  
Intelepeer Holdings, Inc [Member] | Communications Sector [Member] | Investment, Unaffiliated Issuer [Member] | Preferred Stock Warrants [Member]      
Investments at cost   138,000  
Investments at fair value   $ 3,036,000  
Number of Shares (in shares)   2,936,535  
Lumithera, Inc. [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Royalty Agreement [Member]      
Investments at cost   $ 1,200,000  
Investments at fair value   200,000  
xAd, Inc [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member] | Preferred Stock Warrants [Member]      
Investments at cost   177,000  
Investments at fair value   $ 5,000  
Number of Shares (in shares)   4,343,348  
Lytics, Inc. [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, One [Member]      
Cash Rate   14.50%  
Margin   6.00%  
Floor   14.25%  
Ceiling   0.00%  
ETP   4.00%  
Maturity Date   Nov. 01, 2026  
Principal Amount   $ 2,500,000  
Investments at cost   2,471,000  
Investments at fair value   2,373,000  
Lytics, Inc. [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member] | Preferred Stock Warrants [Member]      
Investments at cost   43,000  
Investments at fair value   $ 1,000  
Number of Shares (in shares)   85,543  
Lytics, Inc. [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Two [Member]      
Cash Rate   14.50%  
Margin   6.00%  
Floor   14.25%  
Ceiling   0.00%  
ETP   4.00%  
Maturity Date   Dec. 01, 2026  
Principal Amount   $ 1,250,000  
Investments at cost   1,237,000  
Investments at fair value   $ 1,188,000  
Lytics, Inc. [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Three [Member]      
Cash Rate   14.50%  
Margin   6.00%  
Floor   14.25%  
Ceiling   0.00%  
ETP   4.00%  
Maturity Date   Apr. 01, 2027  
Principal Amount   $ 1,000,000  
Investments at cost   994,000  
Investments at fair value   954,000  
PebblePost, Inc [Member] | Communications Sector [Member] | Investment, Unaffiliated Issuer [Member] | Preferred Stock Warrants [Member]      
Investments at cost   92,000  
Investments at fair value   $ 131,000  
Number of Shares (in shares)   598,850  
ZetrOZ, Inc [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Royalty Agreement [Member]      
Investments at cost   $ 0  
Investments at fair value   $ 0  
Supply Network Visibility Holdings, LLC [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, One [Member]      
Cash Rate   12.75%  
Margin   4.25%  
Floor   12.00%  
Ceiling   0.00%  
ETP   2.50%  
Maturity Date   Jun. 01, 2028  
Principal Amount   $ 2,500,000  
Investments at cost   2,457,000  
Investments at fair value   2,457,000  
Supply Network Visibility Holdings, LLC [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member] | Preferred Stock Warrants [Member]      
Investments at cost   64,000  
Investments at fair value   $ 135,000  
Number of Shares (in shares)   682  
Supply Network Visibility Holdings, LLC [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Two [Member]      
Cash Rate   12.75%  
Margin   4.25%  
Floor   12.00%  
Ceiling   0.00%  
ETP   2.50%  
Maturity Date   Jun. 01, 2028  
Principal Amount   $ 3,500,000  
Investments at cost   3,489,000  
Investments at fair value   $ 3,489,000  
Supply Network Visibility Holdings, LLC [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Three [Member]      
Cash Rate   12.75%  
Margin   4.25%  
Floor   12.00%  
Ceiling   0.00%  
ETP   2.50%  
Maturity Date   Jun. 01, 2028  
Principal Amount   $ 2,500,000  
Investments at cost   2,492,000  
Investments at fair value   $ 2,492,000  
Supply Network Visibility Holdings, LLC [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, Four [Member]      
Cash Rate   12.75%  
Margin   4.25%  
Floor   12.00%  
Ceiling   0.00%  
ETP   2.50%  
Maturity Date   Jun. 01, 2028  
Principal Amount   $ 1,500,000  
Investments at cost   1,495,000  
Investments at fair value   1,495,000  
Stealth BioTherapeutics Inc. [Member] | Biotechnology Sector [Member] | Investment, Unaffiliated Issuer [Member] | Common Stock Warrants [Member]      
Investments at cost   264,000  
Investments at fair value   $ 113,000  
Number of Shares (in shares)   318,181  
Alula Holdings, Inc [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member] | Preferred Stock Warrants [Member]      
Investments at cost   $ 93,000  
Investments at fair value   $ 0  
Number of Shares (in shares)   20,000  
Tallac Therapeutics, Inc [Member] | Biotechnology Sector [Member] | Investment, Unaffiliated Issuer [Member] | Preferred Stock Warrants [Member]      
Investments at cost   $ 194,000  
Investments at fair value   $ 172,000  
Number of Shares (in shares)   1,600,002  
Tallac Therapeutics, Inc [Member] | Biotechnology Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Two [Member]      
Cash Rate   12.75%  
Margin   4.25%  
Floor   12.25%  
Ceiling   0.00%  
ETP   4.00%  
Maturity Date   Aug. 01, 2027  
Principal Amount   $ 2,500,000  
Investments at cost   2,459,000  
Investments at fair value   2,459,000  
Aterian, Inc [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member] | Common Stock Warrants [Member]      
Investments at cost   195,000  
Investments at fair value   $ 0  
Number of Shares (in shares)   76,923  
Cadrenal Therapeutics, Inc. [Member] | Investment, Affiliated Issuer, Noncontrolled [Member]      
Investments at fair value [1]   $ 0 $ 0
Optoro, Inc. [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, One [Member]      
Cash Rate   14.75%  
Margin   6.25%  
Floor   9.50%  
Ceiling   0.00%  
ETP   4.00%  
Maturity Date   Aug. 01, 2027  
Principal Amount   $ 2,500,000  
Investments at cost   2,416,000  
Investments at fair value   2,416,000  
Optoro, Inc. [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member] | Preferred Stock Warrants [Member]      
Investments at cost   182,000  
Investments at fair value   $ 145,000  
Number of Shares (in shares)   11,550  
Optoro, Inc. [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Two [Member]      
Cash Rate   14.75%  
Margin   6.25%  
Floor   9.50%  
Ceiling   0.00%  
ETP   4.00%  
Maturity Date   Jul. 01, 2028  
Principal Amount   $ 1,875,000  
Investments at cost   1,787,000  
Investments at fair value   1,787,000  
Xeris Pharmaceuticals, Inc [Member] | Biotechnology Sector [Member] | Investment, Unaffiliated Issuer [Member] | Common Stock Warrants [Member]      
Investments at cost   72,000  
Investments at fair value   $ 33,000  
Number of Shares (in shares)   126,000  
Caastle, Inc [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member] | Preferred Stock Warrants [Member]      
Investments at cost   $ 65,000  
Investments at fair value   $ 1,055,000  
Number of Shares (in shares)   268,591  
AccuVein Inc [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Common Stock Warrants [Member]      
Investments at cost   $ 24,000  
Investments at fair value   $ 0  
Number of Shares (in shares)   1,175  
Aerin Medical, Inc [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Preferred Stock Warrants [Member]      
Investments at cost   $ 66,000  
Investments at fair value   $ 1,199,000  
Number of Shares (in shares)   1,818,183  
Aerobiotix, LLC [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Preferred Stock Warrants [Member]      
Investments at cost   $ 48,000  
Investments at fair value   $ 9,000  
Number of Shares (in shares)   8,800  
Aerobiotix, LLC [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Fixed Index One [Member]      
Cash Rate   9.00%  
Margin   0.00%  
Floor   0.00%  
Ceiling   0.00%  
ETP   18.00%  
Maturity Date   Apr. 01, 2028  
Principal Amount   $ 2,500,000  
Investments at cost   2,468,000  
Investments at fair value   $ 2,342,000  
Aerobiotix, LLC [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Fixed Index Two [Member]      
Cash Rate   9.00%  
Margin   0.00%  
Floor   0.00%  
Ceiling   0.00%  
ETP   18.00%  
Maturity Date   Apr. 01, 2028  
Principal Amount   $ 2,500,000  
Investments at cost   2,468,000  
Investments at fair value   $ 2,342,000  
Aerobiotix, LLC [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Fixed Index Three [Member]      
Cash Rate   9.00%  
Margin   0.00%  
Floor   0.00%  
Ceiling   0.00%  
ETP   18.00%  
Maturity Date   Jun. 30, 2024  
Principal Amount   $ 200,000  
Investments at cost   200,000  
Investments at fair value   190,000  
CZV, Inc [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member] | Common Stock Warrants [Member]      
Investments at cost   81,000  
Investments at fair value   $ 71,000  
Number of Shares (in shares)   65,569  
Canary Medical Inc. [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Preferred Stock Warrants [Member]      
Investments at cost   $ 86,000  
Investments at fair value   $ 1,305,000  
Number of Shares (in shares)   12,153  
Unagi, Inc [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, One [Member]      
Cash Rate   16.25%  
Margin   7.75%  
Floor   11.00%  
Ceiling   0.00%  
ETP   0.00%  
Maturity Date   May 01, 2027  
Principal Amount   $ 1,204,000  
Investments at cost   1,086,000  
Investments at fair value   872,000  
Unagi, Inc [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member] | Preferred Stock Warrants [Member]      
Investments at cost   32,000  
Investments at fair value   $ 0  
Number of Shares (in shares)   171,081  
Unagi, Inc [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Two [Member]      
Cash Rate   16.25%  
Margin   7.75%  
Floor   11.00%  
Ceiling   0.00%  
ETP   0.00%  
Maturity Date   May 01, 2027  
Principal Amount   $ 602,000  
Investments at cost   543,000  
Investments at fair value   $ 436,000  
Unagi, Inc [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Three [Member]      
Cash Rate   16.25%  
Margin   7.75%  
Floor   11.00%  
Ceiling   0.00%  
ETP   0.00%  
Maturity Date   May 01, 2027  
Principal Amount   $ 602,000  
Investments at cost   543,000  
Investments at fair value   $ 436,000  
MyForest Foods Co [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, One [Member]      
Cash Rate   15.25%  
Margin   6.75%  
Floor   10.00%  
Ceiling   0.00%  
ETP   3.00%  
Maturity Date   Oct. 01, 2025  
Principal Amount   $ 3,667,000  
Investments at cost   3,647,000  
Investments at fair value   3,647,000  
MyForest Foods Co [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member] | Preferred Stock Warrants [Member]      
Investments at cost   29,000  
Investments at fair value   $ 56,000  
Number of Shares (in shares)   250  
MyForest Foods Co [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Two [Member]      
Cash Rate   15.25%  
Margin   6.75%  
Floor   10.00%  
Ceiling   0.00%  
ETP   3.00%  
Maturity Date   Oct. 01, 2025  
Principal Amount   $ 1,833,000  
Investments at cost   1,824,000  
Investments at fair value   $ 1,824,000  
Cognoa, Inc. [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, One [Member]      
Cash Rate   14.00%  
Margin   5.50%  
Floor   8.75%  
Ceiling   0.00%  
ETP   6.00%  
Maturity Date   Aug. 01, 2026  
Principal Amount   $ 4,583,000  
Investments at cost   4,546,000  
Investments at fair value   4,546,000  
Cognoa, Inc. [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Preferred Stock Warrants [Member]      
Investments at cost   149,000  
Investments at fair value   $ 167,000  
Number of Shares (in shares)   4,106,174  
Cognoa, Inc. [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Two [Member]      
Cash Rate   14.00%  
Margin   5.50%  
Floor   8.75%  
Ceiling   0.00%  
ETP   6.00%  
Maturity Date   Aug. 01, 2026  
Principal Amount   $ 2,292,000  
Investments at cost   2,273,000  
Investments at fair value   $ 2,273,000  
Reputation Institute, Inc [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, One [Member]      
Cash Rate   15.75%  
Margin   7.25%  
Floor   10.50%  
Ceiling   0.00%  
ETP   3.00%  
Maturity Date   Aug. 01, 2025  
Principal Amount   $ 3,667,000  
Investments at cost   3,625,000  
Investments at fair value   3,625,000  
Reputation Institute, Inc [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member] | Preferred Stock Warrants [Member]      
Investments at cost   56,000  
Investments at fair value   $ 80,000  
Number of Shares (in shares)   3,731  
CSA Medical, Inc [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, One [Member]      
Cash Rate   13.59%  
Margin   5.09%  
Floor   10.00%  
Ceiling   0.00%  
ETP   5.00%  
Maturity Date   Jan. 01, 2024  
Principal Amount   $ 500,000  
Investments at cost   500,000  
Investments at fair value   500,000  
CSA Medical, Inc [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Preferred Stock Warrants [Member]      
Investments at cost   174,000  
Investments at fair value   $ 124,000  
Number of Shares (in shares)   3,341,376  
CSA Medical, Inc [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Two [Member]      
Cash Rate   13.59%  
Margin   5.09%  
Floor   10.00%  
Ceiling   0.00%  
ETP   5.00%  
Maturity Date   Jan. 01, 2024  
Principal Amount   $ 33,000  
Investments at cost   33,000  
Investments at fair value   $ 33,000  
CSA Medical, Inc [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Three [Member]      
Cash Rate   13.59%  
Margin   5.09%  
Floor   10.00%  
Ceiling   0.00%  
ETP   5.00%  
Maturity Date   Mar. 01, 2024  
Principal Amount   $ 800,000  
Investments at cost   794,000  
Investments at fair value   794,000  
Lotame Solutions, Inc. [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member] | Preferred Stock Warrants [Member]      
Investments at cost   18,000  
Investments at fair value   $ 42,000  
Number of Shares (in shares)   71,305  
Britecore Holdings, Inc. [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, One [Member]      
Cash Rate   14.00%  
Margin   5.50%  
Floor   14.00%  
Ceiling   0.00%  
ETP   3.00%  
Maturity Date   Oct. 01, 2028  
Principal Amount   $ 5,000,000  
Investments at cost   4,860,000  
Investments at fair value   4,860,000  
Britecore Holdings, Inc. [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member] | Preferred Stock Warrants [Member]      
Investments at cost   98,000  
Investments at fair value   $ 174,000  
Number of Shares (in shares)   161,215  
Britecore Holdings, Inc. [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Two [Member]      
Cash Rate   14.00%  
Margin   5.50%  
Floor   14.00%  
Ceiling   0.00%  
ETP   3.00%  
Maturity Date   Oct. 01, 2028  
Principal Amount   $ 2,500,000  
Investments at cost   2,466,000  
Investments at fair value   $ 2,466,000  
Britecore Holdings, Inc. [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Three [Member]      
Cash Rate   14.00%  
Margin   5.50%  
Floor   14.00%  
Ceiling   0.00%  
ETP   3.00%  
Maturity Date   Oct. 01, 2028  
Principal Amount   $ 2,500,000  
Investments at cost   2,466,000  
Investments at fair value   $ 2,466,000  
Britecore Holdings, Inc. [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, Four [Member]      
Cash Rate   14.00%  
Margin   5.50%  
Floor   14.00%  
Ceiling   0.00%  
ETP   3.00%  
Maturity Date   Oct. 01, 2028  
Principal Amount   $ 2,500,000  
Investments at cost   2,466,000  
Investments at fair value   2,466,000  
CVRx, Inc [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member] | Common Stock Warrants [Member]      
Investments at cost   76,000  
Investments at fair value   $ 980,000  
Number of Shares (in shares)   47,410  
Primary Kids, Inc [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member] | Preferred Stock Warrants [Member]      
Investments at cost   $ 57,000  
Investments at fair value   $ 591,000  
Number of Shares (in shares)   553,778  
Quip NYC Inc [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member] | Preferred Stock Warrants [Member]      
Investments at cost   $ 325,000  
Investments at fair value   $ 533,000  
Number of Shares (in shares)   6,191  
Updater, Inc [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member] | Preferred Stock Warrants [Member]      
Investments at cost   $ 34,000  
Investments at fair value   $ 0  
Number of Shares (in shares)   114,659  
CPG Beyond, Inc [Member] | Data Storage Sector [Member] | Investment, Unaffiliated Issuer [Member] | Preferred Stock Warrants [Member]      
Investments at cost   $ 242,000  
Investments at fair value   $ 294,000  
Number of Shares (in shares)   500,000  
Silk, Inc [Member] | Data Storage Sector [Member] | Investment, Unaffiliated Issuer [Member] | Preferred Stock Warrants [Member]      
Investments at cost   $ 175,000  
Investments at fair value   $ 124,000  
Number of Shares (in shares)   394,110  
Global Worldwide LLC [Member] | Internet and Media Sector [Member] | Investment, Unaffiliated Issuer [Member] | Preferred Stock Warrants [Member]      
Investments at cost   $ 75,000  
Investments at fair value   $ 63,000  
Number of Shares (in shares)   245,810  
Rocket Lawyer Incorporated [Member] | Internet and Media Sector [Member] | Investment, Unaffiliated Issuer [Member] | Preferred Stock Warrants [Member]      
Investments at cost   $ 92,000  
Investments at fair value   $ 318,000  
Number of Shares (in shares)   261,721  
Skillshare, Inc [Member] | Internet and Media Sector [Member] | Investment, Unaffiliated Issuer [Member] | Preferred Stock Warrants [Member]      
Investments at cost   $ 162,000  
Investments at fair value   $ 1,201,000  
Number of Shares (in shares)   139,074  
Liqid, Inc [Member] | Networking Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, One [Member]      
Cash Rate   14.75%  
Margin   6.25%  
Floor   9.50%  
Ceiling   0.00%  
ETP   4.00%  
Maturity Date   Sep. 01, 2024  
Principal Amount   $ 1,500,000  
Investments at cost   1,481,000  
Investments at fair value   1,481,000  
Liqid, Inc [Member] | Networking Sector [Member] | Investment, Unaffiliated Issuer [Member] | Preferred Stock Warrants [Member]      
Investments at cost   364,000  
Investments at fair value   $ 210,000  
Number of Shares (in shares)   344,102  
Liqid, Inc [Member] | Networking Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Two [Member]      
Cash Rate   14.75%  
Margin   6.25%  
Floor   9.50%  
Ceiling   0.00%  
ETP   4.00%  
Maturity Date   Sep. 01, 2024  
Principal Amount   $ 1,500,000  
Investments at cost   1,481,000  
Investments at fair value   $ 1,481,000  
Liqid, Inc [Member] | Networking Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index Three [Member]      
Cash Rate   14.75%  
Margin   6.25%  
Floor   9.50%  
Ceiling   0.00%  
ETP   4.00%  
Maturity Date   Sep. 01, 2024  
Principal Amount   $ 750,000  
Investments at cost   740,000  
Investments at fair value   $ 740,000  
Liqid, Inc [Member] | Networking Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, Four [Member]      
Cash Rate   14.75%  
Margin   6.25%  
Floor   9.50%  
Ceiling   0.00%  
ETP   4.00%  
Maturity Date   Sep. 01, 2024  
Principal Amount   $ 667,000  
Investments at cost   656,000  
Investments at fair value   $ 656,000  
Liqid, Inc [Member] | Networking Sector [Member] | Investment, Unaffiliated Issuer [Member] | Term Loan, Prime Index, Five [Member]      
Cash Rate   14.75%  
Margin   6.25%  
Floor   9.50%  
Ceiling   0.00%  
ETP   4.00%  
Maturity Date   Sep. 01, 2024  
Principal Amount   $ 750,000  
Investments at cost   729,000  
Investments at fair value   729,000  
Halio, Inc [Member] | Power Management Sector [Member] | Investment, Unaffiliated Issuer [Member] | Common Stock Warrants [Member]      
Investments at cost   1,585,000  
Investments at fair value   $ 2,700,000  
Number of Shares (in shares)   38,241,466  
Avalanche Technology, Inc [Member] | Semiconductor Sector [Member] | Investment, Unaffiliated Issuer [Member] | Preferred Stock Warrants [Member]      
Investments at cost   $ 45,000  
Investments at fair value   $ 0  
Number of Shares (in shares)   5,938  
E La Carte, Inc [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member] | Common Stock Warrants [Member]      
Investments at cost   $ 60,000  
Investments at fair value   $ 0  
Number of Shares (in shares)   147,361  
Everstream Holdings, LLC [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member] | Preferred Stock Warrants [Member]      
Investments at cost   $ 70,000  
Investments at fair value   $ 63,000  
Number of Shares (in shares)   350,000  
Unrestricted Short Term Investments [Member]      
Investments at cost 27,266,000 $ 26,450,000  
Investments at fair value 27,266,000 26,450,000  
Unrestricted Short Term Investments [Member] | U S Bank Money Market Deposit Account [Member]      
Investments at cost 27,266,000 26,450,000  
Investments at fair value 27,266,000 26,450,000  
Common Stock [Member] | Evelo Biosciences, Inc. [Member] | Biotechnology Sector [Member] | Investment, Affiliated Issuer, Noncontrolled [Member]      
Investments at cost 5,000,000 5,000,000  
Investments at fair value $ 0 $ 132,000  
Number of Shares (in shares) 2,164,502 2,164,502  
Common Stock [Member] | Aulea Medical, Inc. [Member] | Medical Device Sector [Member] | Investment, Affiliated Issuer, Noncontrolled [Member]      
Investments at cost $ 0 $ 0  
Investments at fair value $ 0 $ 0  
Number of Shares (in shares) 660,537 660,537  
Common Stock [Member] | Better Place Forests Co. [Member] | Consumer-related Technologies [Member] | Investment, Affiliated Issuer, Controlled [Member]      
Investments at cost $ 639,000    
Investments at fair value $ 0    
Number of Shares (in shares) 2,278,272    
Common Stock [Member] | Better Place Forests Co. [Member] | Technology Sector [Member] | Investment, Affiliated Issuer, Controlled [Member]      
Investments at cost   $ 2,061,000  
Investments at fair value   $ 2,165,000  
Number of Shares (in shares)   2,278,272  
Common Stock [Member] | Castle Creek Biosciences, Inc [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 250,000    
Investments at fair value $ 250,000    
Number of Shares (in shares) 1,162    
Common Stock [Member] | Castle Creek Biosciences, Inc [Member] | Biotechnology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost   $ 250,000  
Investments at fair value   $ 250,000  
Number of Shares (in shares)   1,162  
Common Stock [Member] | Emalex Biosciences, Inc. [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 356,000    
Investments at fair value $ 356,000    
Number of Shares (in shares) 32,831    
Common Stock [Member] | Emalex Biosciences, Inc. [Member] | Biotechnology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost   $ 355,000  
Investments at fair value   $ 355,000  
Number of Shares (in shares)   32,831  
Common Stock [Member] | Nexii Building Solutions, Inc [Member] | Other Sustainability Sector [Member] | Investment, Affiliated Issuer, Controlled [Member]      
Investments at cost $ 3,297,000    
Investments at fair value $ 0    
Number of Shares (in shares) 108,320    
Common Stock [Member] | Lumithera, Inc. [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 2,000,000    
Investments at fair value $ 1,700,000    
Number of Shares (in shares) 392,651    
Common Stock [Member] | Lumithera, Inc. [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost   $ 2,000,000  
Investments at fair value   $ 1,700,000  
Number of Shares (in shares)   392,651  
Common Stock [Member] | Cadrenal Therapeutics, Inc. [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 0    
Investments at fair value $ 580,000    
Number of Shares (in shares) 40,000    
Common Stock [Member] | Cadrenal Therapeutics, Inc. [Member] | Biotechnology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost   $ 0  
Investments at fair value   $ 443,000  
Number of Shares (in shares)   600,000  
Common Stock [Member] | Getaround, Inc [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 253,000    
Investments at fair value $ 3,000    
Number of Shares (in shares) 87,082    
Common Stock [Member] | Getaround, Inc [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost   $ 253,000  
Investments at fair value   $ 20,000  
Number of Shares (in shares)   87,082  
Common Stock [Member] | SnagAJob.com, Inc [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 9,000    
Investments at fair value $ 83,000    
Number of Shares (in shares) 82,974    
Common Stock [Member] | SnagAJob.com, Inc [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost   $ 9,000  
Investments at fair value   $ 83,000  
Number of Shares (in shares)   82,974  
Common Stock [Member] | Cognoa, Inc. [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 487,000    
Investments at fair value $ 487,000    
Number of Shares (in shares) 8,123,877    
Common Stock [Member] | Tigo Energy, Inc. [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 111,000    
Investments at fair value $ 5,000    
Number of Shares (in shares) 5,205    
Common Stock [Member] | Tigo Energy, Inc. [Member] | Other Sustainability Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost   $ 111,000  
Investments at fair value   $ 13,000  
Number of Shares (in shares)   5,205  
Term Loan, Prime Index, One [Member] | DropOff, Inc. [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 14.00%    
Margin 6.50%    
Floor 9.75%    
Ceiling 0.00%    
ETP 3.50%    
Maturity Date Jun. 01, 2026    
Principal Amount $ 6,804,000    
Investments at cost 6,740,000    
Investments at fair value $ 6,362,000    
Term Loan, Prime Index, One [Member] | Hound Labs, Inc. [Member] | Diagnostics Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 13.50%    
Margin 6.00%    
Floor 9.25%    
Ceiling 0.00%    
ETP 3.50%    
Maturity Date Jun. 01, 2026    
Principal Amount $ 1,607,000    
Investments at cost 1,576,000    
Investments at fair value $ 943,000    
Term Loan, Prime Index, One [Member] | Better Place Forests Co. [Member] | Consumer-related Technologies [Member] | Investment, Affiliated Issuer, Controlled [Member]      
Cash Rate 12.00%    
Margin 3.75%    
Floor 12.00%    
Ceiling 0.00%    
ETP 2.78%    
Maturity Date Aug. 01, 2029    
Principal Amount $ 4,012,000    
Investments at cost 4,058,000    
Investments at fair value $ 0    
Term Loan, Prime Index, One [Member] | Castle Creek Biosciences, Inc [Member] | Biotechnology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 12.88% 13.25%  
Margin 5.13% 4.75%  
Floor 9.55% 9.55%  
Ceiling 13.50% 13.50%  
ETP 5.50% 5.50%  
Maturity Date May 01, 2026 May 01, 2026  
Principal Amount $ 3,333,000 $ 5,000,000  
Investments at cost 3,326,000 4,979,000  
Investments at fair value $ 3,326,000 $ 4,979,000  
Term Loan, Prime Index, One [Member] | Candesant Biomedical, Inc. [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 11.50%    
Margin 3.50%    
Floor 11.50%    
Ceiling 0.00%    
ETP 5.00%    
Maturity Date Sep. 01, 2027    
Principal Amount $ 5,000,000    
Investments at cost 4,785,000    
Investments at fair value $ 4,785,000    
Term Loan, Prime Index, One [Member] | VERO Biotech LLC [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 12.25%    
Margin 3.75%    
Floor 12.25%    
Ceiling 0.00%    
ETP 4.00%    
Maturity Date Jan. 01, 2029    
Principal Amount $ 15,000,000    
Investments at cost 14,735,000    
Investments at fair value $ 14,735,000    
Term Loan, Prime Index, One [Member] | Havenly, Inc. [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 12.50%    
Margin 5.00%    
Floor 5.00%    
Ceiling 0.00%    
ETP 10.40%    
Maturity Date Mar. 01, 2027    
Principal Amount $ 2,000,000    
Investments at cost 1,568,000    
Investments at fair value $ 1,568,000    
Term Loan, Prime Index, One [Member] | Kodiak Robotics, Inc. [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 13.00%    
Margin 5.50%    
Floor 10.25%    
Ceiling 0.00%    
ETP 4.00%    
Maturity Date Apr. 01, 2026    
Principal Amount $ 10,000,000    
Investments at cost 9,977,000    
Investments at fair value $ 9,977,000    
Term Loan, Prime Index, One [Member] | BrightInsight, Inc. [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 13.25%    
Margin 5.50%    
Floor 9.50%    
Ceiling 0.00%    
ETP 3.00%    
Maturity Date Aug. 01, 2027    
Principal Amount $ 7,000,000    
Investments at cost 6,954,000    
Investments at fair value $ 6,954,000    
Term Loan, Prime Index, One [Member] | Axiom Space, Inc [Member] | Communications Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 13.75%    
Margin 6.00%    
Floor 9.25%    
Ceiling 0.00%    
ETP 2.50%    
Maturity Date Jun. 01, 2026    
Principal Amount $ 3,750,000    
Investments at cost 3,731,000    
Investments at fair value $ 3,731,000    
Term Loan, Prime Index, One [Member] | Parse Biosciences, Inc. [Member] | Diagnostics Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 11.50%    
Margin 3.25%    
Floor 11.50%    
Ceiling 0.00%    
ETP 5.00%    
Maturity Date Jan. 01, 2028    
Principal Amount $ 5,000,000    
Investments at cost 4,659,000    
Investments at fair value $ 4,659,000    
Term Loan, Prime Index, One [Member] | Noodle Partners, Inc. [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 12.50%    
Margin 5.00%    
Floor 12.00%    
Ceiling 0.00%    
ETP 3.00%    
Maturity Date Mar. 01, 2027    
Principal Amount $ 10,000,000    
Investments at cost 9,928,000    
Investments at fair value $ 9,928,000    
Term Loan, Prime Index, One [Member] | OneNetworks, Inc. dba Finexio [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 11.125%    
Margin 3.625%    
Floor 11.00%    
Ceiling 0.00%    
ETP 3.75%    
Maturity Date Jan. 01, 2030    
Principal Amount $ 2,500,000    
Investments at cost 2,448,000    
Investments at fair value $ 2,448,000    
Term Loan, Prime Index, One [Member] | Emalex Biosciences, Inc. [Member] | Biotechnology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 12.22% 13.22%  
Margin 4.72% 4.72%  
Floor 9.75% 9.75%  
Ceiling 0.00% 0.00%  
ETP 5.00% 5.00%  
Maturity Date Nov. 01, 2025 Jun. 01, 2024  
Principal Amount $ 4,167,000 $ 1,414,000  
Investments at cost 4,144,000 1,410,000  
Investments at fair value $ 4,144,000 $ 1,410,000  
Term Loan, Prime Index, One [Member] | Lyrical Foods, Inc [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 11.00%    
Margin 3.50%    
Floor 9.00%    
Ceiling 0.00%    
ETP 5.00%    
Maturity Date Jul. 01, 2028    
Principal Amount $ 2,679,000    
Investments at cost 2,768,000    
Investments at fair value $ 2,405,000    
Term Loan, Prime Index, One [Member] | Mirantis, Inc [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 11.75%    
Margin 3.50%    
Floor 11.75%    
Ceiling 0.00%    
ETP 4.00%    
Maturity Date Oct. 01, 2028    
Principal Amount $ 5,000,000    
Investments at cost 4,934,000    
Investments at fair value $ 4,934,000    
Term Loan, Prime Index, One [Member] | Elligo Healthcare Research, Inc. [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 11.75%    
Margin 3.50%    
Floor 11.75%    
Ceiling 0.00%    
ETP 4.00%    
Maturity Date Oct. 01, 2027    
Principal Amount $ 10,000,000    
Investments at cost 9,890,000    
Investments at fair value $ 9,890,000    
Term Loan, Prime Index, One [Member] | Pivot Bio, Inc. [Member] | Energy Efficiency [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 12.00%    
Margin 4.00%    
Floor 12.00%    
Ceiling 0.00%    
ETP 4.00%    
Maturity Date Feb. 01, 2029    
Principal Amount $ 5,000,000    
Investments at cost 4,742,000    
Investments at fair value $ 4,742,000    
Term Loan, Prime Index, One [Member] | NextCar Holding Company, Inc [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 13.50%    
Margin 5.75%    
Floor 9.00%    
Ceiling 0.00%    
ETP 5.25%    
Maturity Date Oct. 31, 2023    
Principal Amount $ 6,042,000    
Investments at cost 5,415,000    
Investments at fair value $ 1,271,000    
Term Loan, Prime Index, One [Member] | KSQ Therapeutics, Inc. [Member] | Biotechnology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 12.25% 13.25%  
Margin 4.75% 4.75%  
Floor 8.50% 8.50%  
Ceiling 0.00% 0.00%  
ETP 5.50% 5.50%  
Maturity Date May 01, 2027 May 01, 2027  
Principal Amount $ 6,250,000 $ 6,250,000  
Investments at cost 6,220,000 6,199,000  
Investments at fair value $ 6,220,000 $ 6,199,000  
Term Loan, Prime Index, One [Member] | Swift Health Systems Inc. [Member] | Medical Device Sector [Member] | Investment, Affiliated Issuer, Controlled [Member]      
Cash Rate 10.25%    
Margin 2.50%    
Floor 2.50%    
Ceiling 0.00%    
ETP 9.14%    
Maturity Date Jun. 01, 2028    
Principal Amount $ 1,948,000    
Investments at cost 1,925,000    
Investments at fair value $ 1,658,000    
Term Loan, Prime Index, One [Member] | Soli Organic, Inc [Member] | Other Sustainability Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 14.25%    
Margin 6.75%    
Floor 10.00%    
Ceiling 0.00%    
ETP 2.75%    
Maturity Date Apr. 01, 2026    
Principal Amount $ 5,000,000    
Investments at cost 4,922,000    
Investments at fair value $ 4,792,000    
Term Loan, Prime Index, One [Member] | Temperpack Technologies, Inc [Member] | Other Sustainability Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 14.25%    
Margin 6.75%    
Floor 10.00%    
Ceiling 0.00%    
ETP 2.50%    
Maturity Date Apr. 01, 2028    
Principal Amount $ 3,750,000    
Investments at cost 3,707,000    
Investments at fair value $ 3,707,000    
Term Loan, Prime Index, One [Member] | SafelyYou, Inc [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 11.00%    
Margin 3.25%    
Floor 11.00%    
Ceiling 0.00%    
ETP 5.00%    
Maturity Date Jun. 01, 2027    
Principal Amount $ 5,000,000    
Investments at cost 4,872,000    
Investments at fair value $ 4,872,000    
Term Loan, Prime Index, One [Member] | Aerofarms, Inc. [Member] | Other Sustainability Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 14.25%    
Margin 6.75%    
Floor 10.00%    
Ceiling 0.00%    
ETP 4.33%    
Maturity Date Dec. 01, 2026    
Principal Amount $ 3,594,000    
Investments at cost 3,564,000    
Investments at fair value $ 3,564,000    
Term Loan, Prime Index, One [Member] | Native Microbials, Inc. [Member] | Biotechnology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 12.75% 13.75%  
Margin 5.25% 5.25%  
Floor 8.50% 8.50%  
Ceiling 0.00% 0.00%  
ETP 5.00% 5.00%  
Maturity Date Nov. 01, 2026 Nov. 01, 2026  
Principal Amount $ 2,875,000 $ 3,750,000  
Investments at cost 2,862,000 3,716,000  
Investments at fair value $ 2,862,000 $ 3,716,000  
Term Loan, Prime Index, One [Member] | Greenlight Biosciences, Inc [Member] | Biotechnology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 13.25% 14.25%  
Margin 5.75% 5.75%  
Floor 9.00% 9.00%  
Ceiling 0.00% 0.00%  
ETP 3.00% 3.00%  
Maturity Date Jul. 01, 2025 Jul. 01, 2025  
Principal Amount $ 1,000,000 $ 3,000,000  
Investments at cost 971,000 2,914,000  
Investments at fair value $ 971,000 $ 2,870,000  
Term Loan, Prime Index, One [Member] | PDS Biotechnology Corporation [Member] | Biotechnology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 13.25% 14.25%  
Margin 5.75% 5.75%  
Floor 9.75% 9.75%  
Ceiling 0.00% 0.00%  
ETP 3.75% 3.75%  
Maturity Date Sep. 01, 2026 Sep. 01, 2026  
Principal Amount $ 8,750,000 $ 10,000,000  
Investments at cost 8,712,000 9,911,000  
Investments at fair value $ 8,712,000 $ 9,911,000  
Term Loan, Prime Index, One [Member] | Ursa Space Systems Inc. [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 12.00%    
Margin 4.00%    
Floor 12.00%    
Ceiling 0.00%    
ETP 3.00%    
Maturity Date Nov. 01, 2028    
Principal Amount $ 2,500,000    
Investments at cost 2,365,000    
Investments at fair value $ 2,365,000    
Term Loan, Prime Index, One [Member] | Provivi, Inc. [Member] | Biotechnology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 12.86% 13.86%  
Margin 5.36% 5.36%  
Floor 9.50% 9.50%  
Ceiling 0.00% 0.00%  
ETP 4.30% 5.50%  
Maturity Date Jan. 01, 2027 Dec. 01, 2024  
Principal Amount $ 3,482,000 $ 4,666,000  
Investments at cost 3,418,000 4,579,000  
Investments at fair value $ 3,182,000 $ 4,414,000  
Term Loan, Prime Index, One [Member] | Viken Detection Corporation [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 11.75%    
Margin 4.00%    
Floor 11.75%    
Ceiling 0.00%    
ETP 3.50%    
Maturity Date Jun. 01, 2027    
Principal Amount $ 4,833,000    
Investments at cost 4,791,000    
Investments at fair value $ 4,791,000    
Term Loan, Prime Index, One [Member] | GT Medical Technologies, Inc. [Member] | Other Healthcare Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 11.25%    
Margin 3.25%    
Floor 11.25%    
Ceiling 0.00%    
ETP 4.00%    
Maturity Date Oct. 01, 2029    
Principal Amount $ 3,750,000    
Investments at cost 3,595,000    
Investments at fair value $ 3,595,000    
Term Loan, Prime Index, One [Member] | Supply Network Visibility Holdings, LLC [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 12.00%    
Margin 4.25%    
Floor 12.00%    
Ceiling 0.00%    
ETP 2.50%    
Maturity Date Jun. 01, 2028    
Principal Amount $ 2,500,000    
Investments at cost 2,414,000    
Investments at fair value $ 2,414,000    
Term Loan, Prime Index, One [Member] | Stealth BioTherapeutics Inc. [Member] | Biotechnology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 13.00% 14.00%  
Margin 5.50% 5.50%  
Floor 8.75% 8.75%  
Ceiling 0.00% 0.00%  
ETP 6.00% 6.00%  
Maturity Date Oct. 01, 2025 Oct. 01, 2025  
Principal Amount $ 2,024,000 $ 4,250,000  
Investments at cost 1,999,000 4,193,000  
Investments at fair value $ 1,999,000 $ 4,193,000  
Term Loan, Prime Index, One [Member] | Tallac Therapeutics, Inc [Member] | Biotechnology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 12.25% 12.75%  
Margin 4.25% 4.25%  
Floor 12.25% 12.25%  
Ceiling 0.00% 0.00%  
ETP 4.00% 4.00%  
Maturity Date Aug. 01, 2027 Aug. 01, 2027  
Principal Amount $ 2,500,000 $ 2,500,000  
Investments at cost 2,471,000 2,230,000  
Investments at fair value $ 2,471,000 2,230,000  
Term Loan, Prime Index, One [Member] | Optoro, Inc. [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 14.00%    
Margin 6.25%    
Floor 9.50%    
Ceiling 0.00%    
ETP 4.00%    
Maturity Date Aug. 01, 2027    
Principal Amount $ 2,500,000    
Investments at cost 2,448,000    
Investments at fair value $ 2,448,000    
Term Loan, Prime Index, One [Member] | Hometeam Technologies, Inc [Member] | Other Healthcare Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 11.25%    
Margin 3.25%    
Floor 11.25%    
Ceiling 0.00%    
ETP 3.50%    
Maturity Date Aug. 01, 2029    
Principal Amount $ 5,000,000    
Investments at cost 4,854,000    
Investments at fair value $ 4,854,000    
Term Loan, Prime Index, One [Member] | Standvast Holdings, LLC [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 12.75%    
Margin 4.25%    
Floor 12.75%    
Ceiling 0.00%    
ETP 3.00%    
Maturity Date Jun. 01, 2028    
Principal Amount $ 2,500,000    
Investments at cost 2,339,000    
Investments at fair value $ 2,267,000    
Term Loan, Prime Index, One [Member] | Unagi, Inc [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 15.25%    
Margin 7.75%    
Floor 11.00%    
Ceiling 0.00%    
ETP 0.00%    
Maturity Date May 01, 2027    
Principal Amount $ 1,415,000    
Investments at cost 1,086,000    
Investments at fair value $ 0    
Term Loan, Prime Index, One [Member] | Fictiv, Inc. [Member] | Networking Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 10.88%    
Margin 3.375%    
Floor 10.00%    
Ceiling 0.00%    
ETP 4.00%    
Maturity Date Apr. 01, 2029    
Principal Amount $ 5,000,000    
Investments at cost 4,706,000    
Investments at fair value $ 4,706,000    
Term Loan, Prime Index, One [Member] | Britecore Holdings, Inc. [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 14.00%    
Margin 5.50%    
Floor 14.00%    
Ceiling 0.00%    
ETP 3.00%    
Maturity Date Oct. 01, 2028    
Principal Amount $ 5,000,000    
Investments at cost 4,909,000    
Investments at fair value $ 4,909,000    
Term Loan, Prime Index, One [Member] | Crafty Holdings, Inc.[Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 12.00%    
Margin 4.50%    
Floor 12.00%    
Ceiling 0.00%    
ETP 4.00%    
Maturity Date Jan. 01, 2029    
Principal Amount $ 5,000,000    
Investments at cost 4,846,000    
Investments at fair value 4,846,000    
Other Investments, Prime Index, One [Member] | Evelo Biosciences, Inc. [Member] | Biotechnology Sector [Member] | Investment, Affiliated Issuer, Noncontrolled [Member]      
Investments at cost 4,910,000    
Investments at fair value 1,825    
Preferred Stock [Member] | Better Place Forests Co. [Member] | Consumer-related Technologies [Member] | Investment, Affiliated Issuer, Controlled [Member]      
Investments at cost 3,922,000    
Investments at fair value $ 0    
Number of Shares (in shares) 5,350,142    
Preferred Stock [Member] | Better Place Forests Co. [Member] | Technology Sector [Member] | Investment, Affiliated Issuer, Controlled [Member]      
Investments at cost   1,250,000  
Investments at fair value   $ 859,000  
Number of Shares (in shares)   3,124,448  
Preferred Stock [Member] | Axiom Space, Inc [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 261,000    
Investments at fair value $ 306,000    
Number of Shares (in shares) 1,810    
Preferred Stock [Member] | Axiom Space, Inc [Member] | Communications Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost   $ 261,000  
Investments at fair value   $ 306,000  
Number of Shares (in shares)   1,810  
Preferred Stock [Member] | Nexii Building Solutions, Inc [Member] | Other Sustainability Sector [Member] | Investment, Affiliated Issuer, Controlled [Member]      
Investments at cost $ 3,419,000    
Investments at fair value $ 7,909,000    
Number of Shares (in shares) 542    
Preferred Stock [Member] | NextCar Holding Company, Inc [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 89,000    
Investments at fair value $ 0    
Number of Shares (in shares) 2,688,971    
Preferred Stock [Member] | NextCar Holding Company, Inc [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost   $ 89,000  
Investments at fair value   $ 89,000  
Number of Shares (in shares)   2,688,971  
Preferred Stock [Member] | Swift Health Systems Inc. [Member] | Medical Device Sector [Member] | Investment, Affiliated Issuer, Controlled [Member]      
Investments at cost $ 10,012    
Investments at fair value $ 10,012    
Number of Shares (in shares) 3,588,505    
Preferred Stock [Member] | PebblePost, Inc [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 73,000    
Investments at fair value $ 73,000    
Number of Shares (in shares) 56,212    
Preferred Stock [Member] | Caastle, Inc [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 2,681,000    
Investments at fair value $ 2,681,000    
Number of Shares (in shares) 242,180    
Preferred Stock [Member] | Cognoa, Inc. [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 250,000    
Investments at fair value $ 250,000    
Number of Shares (in shares) 1,059,636    
Preferred Stock [Member] | Decisyon, Inc [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 2,800,000    
Investments at fair value $ 1,281,000    
Number of Shares (in shares) 280,000    
Preferred Stock [Member] | Decisyon, Inc [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost   $ 2,800,000  
Investments at fair value   $ 1,281,000  
Number of Shares (in shares)   280,000  
Preferred Stock [Member] | Lotame Solutions, Inc. [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 4,000    
Investments at fair value $ 193,000    
Number of Shares (in shares) 66,127    
Preferred Stock [Member] | Lotame Solutions, Inc. [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost   $ 4,000  
Investments at fair value   $ 193,000  
Number of Shares (in shares)   66,127  
Term Loan, Prime Index Two [Member] | DropOff, Inc. [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 14.00%    
Margin 6.50%    
Floor 9.75%    
Ceiling 0.00%    
ETP 3.50%    
Maturity Date Jun. 01, 2026    
Principal Amount $ 6,280,000    
Investments at cost 6,221,000    
Investments at fair value $ 5,872,000    
Term Loan, Prime Index Two [Member] | Hound Labs, Inc. [Member] | Diagnostics Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 13.50%    
Margin 6.00%    
Floor 9.25%    
Ceiling 0.00%    
ETP 3.50%    
Maturity Date Jun. 01, 2026    
Principal Amount $ 1,607,000    
Investments at cost 1,576,000    
Investments at fair value $ 943,000    
Term Loan, Prime Index Two [Member] | Better Place Forests Co. [Member] | Consumer-related Technologies [Member] | Investment, Affiliated Issuer, Controlled [Member]      
Cash Rate 12.00%    
Margin 3.75%    
Floor 12.00%    
Ceiling 0.00%    
ETP 2.78%    
Maturity Date Aug. 01, 2029    
Principal Amount $ 2,006,000    
Investments at cost 1,989,000    
Investments at fair value $ 0    
Term Loan, Prime Index Two [Member] | Castle Creek Biosciences, Inc [Member] | Biotechnology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 12.88% 13.25%  
Margin 5.13% 4.75%  
Floor 9.55% 9.55%  
Ceiling 13.50% 13.50%  
ETP 5.50% 5.50%  
Maturity Date May 01, 2026 May 01, 2026  
Principal Amount $ 3,333,000 $ 5,000,000  
Investments at cost 3,326,000 4,979,000  
Investments at fair value $ 3,326,000 $ 4,979,000  
Term Loan, Prime Index Two [Member] | VERO Biotech LLC [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 12.25%    
Margin 3.75%    
Floor 12.25%    
Ceiling 0.00%    
ETP 4.00%    
Maturity Date Jan. 01, 2029    
Principal Amount $ 10,000,000    
Investments at cost 9,823,000    
Investments at fair value $ 9,823,000    
Term Loan, Prime Index Two [Member] | Havenly, Inc. [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 12.50%    
Margin 5.00%    
Floor 5.00%    
Ceiling 0.00%    
ETP 10.40%    
Maturity Date Mar. 01, 2027    
Principal Amount $ 3,000,000    
Investments at cost 2,529,000    
Investments at fair value $ 2,529,000    
Term Loan, Prime Index Two [Member] | Kodiak Robotics, Inc. [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 13.00%    
Margin 5.50%    
Floor 10.25%    
Ceiling 0.00%    
ETP 4.00%    
Maturity Date Apr. 01, 2026    
Principal Amount $ 10,000,000    
Investments at cost 9,955,000    
Investments at fair value $ 9,955,000    
Term Loan, Prime Index Two [Member] | BrightInsight, Inc. [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 13.25%    
Margin 5.50%    
Floor 9.50%    
Ceiling 0.00%    
ETP 3.00%    
Maturity Date Aug. 01, 2027    
Principal Amount $ 3,500,000    
Investments at cost 3,477,000    
Investments at fair value $ 3,477,000    
Term Loan, Prime Index Two [Member] | Axiom Space, Inc [Member] | Communications Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 13.75%    
Margin 6.00%    
Floor 9.25%    
Ceiling 0.00%    
ETP 2.50%    
Maturity Date Jun. 01, 2026    
Principal Amount $ 3,750,000    
Investments at cost 3,731,000    
Investments at fair value $ 3,731,000    
Term Loan, Prime Index Two [Member] | Parse Biosciences, Inc. [Member] | Diagnostics Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 11.50%    
Margin 3.25%    
Floor 11.50%    
Ceiling 0.00%    
ETP 5.00%    
Maturity Date Jan. 01, 2028    
Principal Amount $ 5,000,000    
Investments at cost 4,910,000    
Investments at fair value $ 4,910,000    
Term Loan, Prime Index Two [Member] | Noodle Partners, Inc. [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 12.50%    
Margin 5.00%    
Floor 12.00%    
Ceiling 0.00%    
ETP 3.00%    
Maturity Date Mar. 01, 2027    
Principal Amount $ 5,000,000    
Investments at cost 4,964,000    
Investments at fair value $ 4,964,000    
Term Loan, Prime Index Two [Member] | OneNetworks, Inc. dba Finexio [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 11.125%    
Margin 3.625%    
Floor 11.00%    
Ceiling 0.00%    
ETP 3.75%    
Maturity Date Jan. 01, 2030    
Principal Amount $ 2,500,000    
Investments at cost 2,474,000    
Investments at fair value $ 2,474,000    
Term Loan, Prime Index Two [Member] | Emalex Biosciences, Inc. [Member] | Biotechnology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 12.22% 13.22%  
Margin 4.72% 4.72%  
Floor 9.75% 9.75%  
Ceiling 0.00% 0.00%  
ETP 5.00% 5.00%  
Maturity Date May 01, 2026 Jun. 01, 2024  
Principal Amount $ 5,000,000 $ 1,414,000  
Investments at cost 4,982,000 1,410,000  
Investments at fair value $ 4,982,000 $ 1,410,000  
Term Loan, Prime Index Two [Member] | Mirantis, Inc [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 11.75%    
Margin 3.50%    
Floor 11.75%    
Ceiling 0.00%    
ETP 4.00%    
Maturity Date Oct. 01, 2028    
Principal Amount $ 5,000,000    
Investments at cost 4,934,000    
Investments at fair value $ 4,934,000    
Term Loan, Prime Index Two [Member] | Elligo Healthcare Research, Inc. [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 11.75%    
Margin 3.50%    
Floor 11.75%    
Ceiling 0.00%    
ETP 4.00%    
Maturity Date Oct. 01, 2027    
Principal Amount $ 5,000,000    
Investments at cost 4,945,000    
Investments at fair value $ 4,945,000    
Term Loan, Prime Index Two [Member] | Pivot Bio, Inc. [Member] | Energy Efficiency [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 12.00%    
Margin 4.00%    
Floor 12.00%    
Ceiling 0.00%    
ETP 4.00%    
Maturity Date Feb. 01, 2029    
Principal Amount $ 5,000,000    
Investments at cost 4,951,000    
Investments at fair value $ 4,951,000    
Term Loan, Prime Index Two [Member] | NextCar Holding Company, Inc [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 13.50%    
Margin 5.75%    
Floor 9.00%    
Ceiling 0.00%    
ETP 5.25%    
Maturity Date Oct. 31, 2023    
Principal Amount $ 3,021,000    
Investments at cost 2,707,000    
Investments at fair value $ 635,000    
Term Loan, Prime Index Two [Member] | KSQ Therapeutics, Inc. [Member] | Biotechnology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 12.25% 13.25%  
Margin 4.75% 4.75%  
Floor 8.50% 8.50%  
Ceiling 0.00% 0.00%  
ETP 5.50% 5.50%  
Maturity Date May 01, 2027 May 01, 2027  
Principal Amount $ 6,250,000 $ 6,250,000  
Investments at cost 6,220,000 6,199,000  
Investments at fair value $ 6,220,000 $ 6,199,000  
Term Loan, Prime Index Two [Member] | Swift Health Systems Inc. [Member] | Medical Device Sector [Member] | Investment, Affiliated Issuer, Controlled [Member]      
Cash Rate 10.25%    
Margin 2.50%    
Floor 2.50%    
Ceiling 0.00%    
ETP 9.14%    
Maturity Date Jun. 01, 2028    
Principal Amount $ 1,948,000    
Investments at cost 1,925,000    
Investments at fair value $ 1,658,000    
Term Loan, Prime Index Two [Member] | Soli Organic, Inc [Member] | Other Sustainability Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 14.25%    
Margin 6.75%    
Floor 10.00%    
Ceiling 0.00%    
ETP 2.75%    
Maturity Date Apr. 01, 2026    
Principal Amount $ 2,500,000    
Investments at cost 2,461,000    
Investments at fair value $ 2,396,000    
Term Loan, Prime Index Two [Member] | Temperpack Technologies, Inc [Member] | Other Sustainability Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 14.25%    
Margin 6.75%    
Floor 10.00%    
Ceiling 0.00%    
ETP 2.50%    
Maturity Date Apr. 01, 2028    
Principal Amount $ 3,750,000    
Investments at cost 3,707,000    
Investments at fair value $ 3,707,000    
Term Loan, Prime Index Two [Member] | SafelyYou, Inc [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 11.00%    
Margin 3.25%    
Floor 11.00%    
Ceiling 0.00%    
ETP 5.00%    
Maturity Date Jun. 01, 2027    
Principal Amount $ 5,000,000    
Investments at cost 4,945,000    
Investments at fair value $ 4,945,000    
Term Loan, Prime Index Two [Member] | Aerofarms, Inc. [Member] | Other Sustainability Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 14.25%    
Margin 6.75%    
Floor 10.00%    
Ceiling 0.00%    
ETP 4.33%    
Maturity Date Dec. 01, 2026    
Principal Amount $ 3,594,000    
Investments at cost 3,564,000    
Investments at fair value $ 3,564,000    
Term Loan, Prime Index Two [Member] | Native Microbials, Inc. [Member] | Biotechnology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 12.75% 13.75%  
Margin 5.25% 5.25%  
Floor 8.50% 8.50%  
Ceiling 0.00% 0.00%  
ETP 5.00% 5.00%  
Maturity Date Nov. 01, 2026 Nov. 01, 2026  
Principal Amount $ 1,917,000 $ 2,500,000  
Investments at cost 1,906,000 2,478,000  
Investments at fair value $ 1,906,000 $ 2,478,000  
Term Loan, Prime Index Two [Member] | Greenlight Biosciences, Inc [Member] | Biotechnology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 13.25% 14.25%  
Margin 5.75% 5.75%  
Floor 9.00% 9.00%  
Ceiling 0.00% 0.00%  
ETP 3.00% 3.00%  
Maturity Date Jul. 01, 2025 Jul. 01, 2025  
Principal Amount $ 500,000 $ 1,500,000  
Investments at cost 486,000 1,458,000  
Investments at fair value $ 486,000 $ 1,436,000  
Term Loan, Prime Index Two [Member] | PDS Biotechnology Corporation [Member] | Biotechnology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 13.25% 14.25%  
Margin 5.75% 5.75%  
Floor 9.75% 9.75%  
Ceiling 0.00% 0.00%  
ETP 3.75% 3.75%  
Maturity Date Sep. 01, 2026 Sep. 01, 2026  
Principal Amount $ 3,281,000 $ 3,750,000  
Investments at cost 3,267,000 3,717,000  
Investments at fair value $ 3,267,000 $ 3,717,000  
Term Loan, Prime Index Two [Member] | Ursa Space Systems Inc. [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 12.00%    
Margin 4.00%    
Floor 12.00%    
Ceiling 0.00%    
ETP 3.00%    
Maturity Date Nov. 01, 2028    
Principal Amount $ 2,500,000    
Investments at cost 2,440,000    
Investments at fair value $ 2,440,000    
Term Loan, Prime Index Two [Member] | Provivi, Inc. [Member] | Biotechnology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 12.86% 13.86%  
Margin 5.36% 5.36%  
Floor 9.50% 9.50%  
Ceiling 0.00% 0.00%  
ETP 4.30% 5.50%  
Maturity Date Jan. 01, 2027 Dec. 01, 2024  
Principal Amount $ 3,482,000 $ 4,666,000  
Investments at cost 3,418,000 4,579,000  
Investments at fair value $ 3,182,000 $ 4,414,000  
Term Loan, Prime Index Two [Member] | Viken Detection Corporation [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 11.75%    
Margin 4.00%    
Floor 11.75%    
Ceiling 0.00%    
ETP 3.50%    
Maturity Date Jun. 01, 2027    
Principal Amount $ 2,417,000    
Investments at cost 2,396,000    
Investments at fair value $ 2,396,000    
Term Loan, Prime Index Two [Member] | GT Medical Technologies, Inc. [Member] | Other Healthcare Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 11.25%    
Margin 3.25%    
Floor 11.25%    
Ceiling 0.00%    
ETP 4.00%    
Maturity Date Oct. 01, 2029    
Principal Amount $ 3,750,000    
Investments at cost 3,695,000    
Investments at fair value $ 3,695,000    
Term Loan, Prime Index Two [Member] | Supply Network Visibility Holdings, LLC [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 12.00%    
Margin 4.25%    
Floor 12.00%    
Ceiling 0.00%    
ETP 2.50%    
Maturity Date Jun. 01, 2028    
Principal Amount $ 3,500,000    
Investments at cost 3,492,000    
Investments at fair value $ 3,492,000    
Term Loan, Prime Index Two [Member] | Stealth BioTherapeutics Inc. [Member] | Biotechnology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 13.00% 14.00%  
Margin 5.50% 5.50%  
Floor 8.75% 8.75%  
Ceiling 0.00% 0.00%  
ETP 6.00% 6.00%  
Maturity Date Oct. 01, 2025 Oct. 01, 2025  
Principal Amount $ 1,012,000  
Investments at cost 1,000,000 2,096,000  
Investments at fair value $ 1,000,000 2,096,000  
Term Loan, Prime Index Two [Member] | Tallac Therapeutics, Inc [Member] | Biotechnology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 12.25%    
Margin 4.25%    
Floor 12.25%    
Ceiling 0.00%    
ETP 4.00%    
Maturity Date Aug. 01, 2027    
Principal Amount $ 2,500,000    
Investments at cost 2,471,000    
Investments at fair value $ 2,471,000    
Term Loan, Prime Index Two [Member] | Optoro, Inc. [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 14.00%    
Margin 6.25%    
Floor 9.50%    
Ceiling 0.00%    
ETP 4.00%    
Maturity Date Jul. 01, 2028    
Principal Amount $ 1,875,000    
Investments at cost 1,805,000    
Investments at fair value $ 1,805,000    
Term Loan, Prime Index Two [Member] | Hometeam Technologies, Inc [Member] | Other Healthcare Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 11.25%    
Margin 3.25%    
Floor 11.25%    
Ceiling 0.00%    
ETP 3.50%    
Maturity Date Aug. 01, 2029    
Principal Amount $ 5,000,000    
Investments at cost 4,954,000    
Investments at fair value $ 4,954,000    
Term Loan, Prime Index Two [Member] | Standvast Holdings, LLC [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 12.75%    
Margin 4.25%    
Floor 12.75%    
Ceiling 0.00%    
ETP 3.00%    
Maturity Date Jun. 01, 2028    
Principal Amount $ 2,500,000    
Investments at cost 2,426,000    
Investments at fair value $ 2,352,000    
Term Loan, Prime Index Two [Member] | Unagi, Inc [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 15.25%    
Margin 7.75%    
Floor 11.00%    
Ceiling 0.00%    
ETP 0.00%    
Maturity Date May 01, 2027    
Principal Amount $ 708,000    
Investments at cost 543,000    
Investments at fair value $ 0    
Term Loan, Prime Index Two [Member] | Fictiv, Inc. [Member] | Networking Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 10.88%    
Margin 3.375%    
Floor 10.00%    
Ceiling 0.00%    
ETP 4.00%    
Maturity Date Apr. 01, 2029    
Principal Amount $ 5,000,000    
Investments at cost 4,941,000    
Investments at fair value $ 4,941,000    
Term Loan, Prime Index Two [Member] | Britecore Holdings, Inc. [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 14.00%    
Margin 5.50%    
Floor 14.00%    
Ceiling 0.00%    
ETP 3.00%    
Maturity Date Oct. 01, 2028    
Principal Amount $ 2,500,000    
Investments at cost 2,472,000    
Investments at fair value $ 2,472,000    
Term Loan, Prime Index Two [Member] | Crafty Holdings, Inc.[Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 12.00%    
Margin 4.50%    
Floor 12.00%    
Ceiling 0.00%    
ETP 4.00%    
Maturity Date Jan. 01, 2029    
Principal Amount $ 5,000,000    
Investments at cost 4,911,000    
Investments at fair value 4,911,000    
Common Stock Warrants [Member] | DropOff, Inc. [Member] | Technology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost 455,000    
Investments at fair value $ 0    
Number of Shares (in shares) 516,535    
Common Stock Warrants [Member] | Havenly, Inc. [Member] | Technology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 3,178,000    
Investments at fair value $ 3,106,000    
Number of Shares (in shares) 1,446,429    
Common Stock Warrants [Member] | Axiom Space, Inc [Member] | Technology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 46,000    
Investments at fair value $ 35,000    
Number of Shares (in shares) 1,991    
Common Stock Warrants [Member] | Parse Biosciences, Inc. [Member] | Healthcare Information and Services Segment [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 71,000    
Investments at fair value $ 15,000    
Number of Shares (in shares) 32,244    
Common Stock Warrants [Member] | Avalo Therapeutics, Inc. [Member] | Biotechnology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 311,000    
Investments at fair value $ 0    
Number of Shares (in shares) 117    
Common Stock Warrants [Member] | Mirantis, Inc [Member] | Technology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 223,000    
Investments at fair value $ 585,000    
Number of Shares (in shares) 948,275    
Common Stock Warrants [Member] | Imunon, Inc [Member] | Biotechnology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 65,000    
Investments at fair value $ 0    
Number of Shares (in shares) 19,671    
Common Stock Warrants [Member] | NextCar Holding Company, Inc [Member] | Technology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 188,000    
Investments at fair value $ 0    
Number of Shares (in shares) 12,618    
Common Stock Warrants [Member] | Soli Organic, Inc [Member] | Sustainability Segment [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 20,000    
Investments at fair value $ 19,000    
Number of Shares (in shares) 296    
Common Stock Warrants [Member] | Mustang Bio, Inc [Member] | Biotechnology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 146,000    
Investments at fair value $ 0    
Number of Shares (in shares) 16,611    
Common Stock Warrants [Member] | Divergent Technologies, Inc. [Member] | Technology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 79,000    
Investments at fair value $ 7,000    
Number of Shares (in shares) 9,801    
Common Stock Warrants [Member] | PDS Biotechnology Corporation [Member] | Biotechnology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 160,000    
Investments at fair value $ 14,000    
Number of Shares (in shares) 299,848    
Common Stock Warrants [Member] | Spineology, Inc [Member] | Life Science Segment [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 143,000    
Investments at fair value $ 108,000    
Number of Shares (in shares) 2,714,033    
Common Stock Warrants [Member] | Provivi, Inc. [Member] | Biotechnology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 278,000    
Investments at fair value $ 0    
Number of Shares (in shares) 175,098    
Common Stock Warrants [Member] | Stealth BioTherapeutics Inc. [Member] | Biotechnology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 264,000    
Investments at fair value $ 0    
Number of Shares (in shares) 318,181    
Common Stock Warrants [Member] | Xeris Pharmaceuticals, Inc [Member] | Biotechnology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 73,000    
Investments at fair value $ 91,000    
Number of Shares (in shares) 126,000    
Common Stock Warrants [Member] | AccuVein Inc [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 7,000    
Investments at fair value $ 0    
Number of Shares (in shares) 271    
Common Stock Warrants [Member] | Cognoa, Inc. [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 0    
Investments at fair value $ 2,000    
Number of Shares (in shares) 30,585    
Common Stock Warrants [Member] | Fictiv, Inc. [Member] | Technology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 59,000    
Investments at fair value $ 77,000    
Number of Shares (in shares) 126,841    
Common Stock Warrants [Member] | CVRx, Inc [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 76,000    
Investments at fair value $ 160,000    
Number of Shares (in shares) 47,410    
Common Stock Warrants [Member] | Crafty Holdings, Inc.[Member] | Technology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 132,000    
Investments at fair value $ 132,000    
Number of Shares (in shares) 243,278    
Common Stock Warrants [Member] | E La Carte, Inc [Member] | Technology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 60,000    
Investments at fair value $ 0    
Number of Shares (in shares) 147,361    
Preferred Stock Warrants [Member] | Hound Labs, Inc. [Member] | Healthcare Information and Services Segment [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 45,000    
Investments at fair value $ 0    
Number of Shares (in shares) 451,796    
Preferred Stock Warrants [Member] | Castle Creek Biosciences, Inc [Member] | Biotechnology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 214,000    
Investments at fair value $ 270,000    
Number of Shares (in shares) 7,404    
Preferred Stock Warrants [Member] | Candesant Biomedical, Inc. [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 152,000    
Investments at fair value $ 78,000    
Number of Shares (in shares) 93,336    
Preferred Stock Warrants [Member] | VERO Biotech LLC [Member] | Life Science Segment [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 376,000    
Investments at fair value $ 198,000    
Number of Shares (in shares) 3,701    
Preferred Stock Warrants [Member] | Kodiak Robotics, Inc. [Member] | Technology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 273,000    
Investments at fair value $ 15,000    
Number of Shares (in shares) 639,918    
Preferred Stock Warrants [Member] | BrightInsight, Inc. [Member] | Healthcare Information and Services Segment [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 167,000    
Investments at fair value $ 0    
Number of Shares (in shares) 85,066    
Preferred Stock Warrants [Member] | Parse Biosciences, Inc. [Member] | Healthcare Information and Services Segment [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 166,000    
Investments at fair value $ 15,000    
Number of Shares (in shares) 184,253    
Preferred Stock Warrants [Member] | Magnolia Medical Technologies, Inc [Member] | Life Science Segment [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 194,000    
Investments at fair value $ 368,000    
Number of Shares (in shares) 809,931    
Preferred Stock Warrants [Member] | Noodle Partners, Inc. [Member] | Technology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 116,000    
Investments at fair value $ 0    
Number of Shares (in shares) 84,037    
Preferred Stock Warrants [Member] | Meditrina, Inc [Member] | Life Science Segment [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 83,000    
Investments at fair value $ 34,000    
Number of Shares (in shares) 233,993    
Preferred Stock Warrants [Member] | OneNetworks, Inc. dba Finexio [Member] | Technology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 3,000    
Investments at fair value $ 3,000    
Number of Shares (in shares) 184,646    
Preferred Stock Warrants [Member] | Scientia Vascular, Inc. [Member] | Life Science Segment [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 103,000    
Investments at fair value $ 262,000    
Number of Shares (in shares) 34,410    
Preferred Stock Warrants [Member] | New Aerofarms, Inc. assignee of Aerofarms, Inc [Member] | Sustainability Segment [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 82,000    
Investments at fair value $ 17,000    
Number of Shares (in shares) 400,000    
Preferred Stock Warrants [Member] | Kate Farms, Inc [Member] | Healthcare Information and Services Segment [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 101,000    
Investments at fair value $ 700,000    
Number of Shares (in shares) 82,965    
Preferred Stock Warrants [Member] | Ceribell, Inc. [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 147,000    
Investments at fair value $ 1,573,000    
Number of Shares (in shares) 89,903    
Preferred Stock Warrants [Member] | Emalex Biosciences, Inc. [Member] | Biotechnology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 176,000    
Investments at fair value $ 129,000    
Number of Shares (in shares) 110,402    
Preferred Stock Warrants [Member] | MicroTransponder, Inc. [Member] | Life Science Segment [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 47,000    
Investments at fair value $ 66,000    
Number of Shares (in shares) 103,172    
Preferred Stock Warrants [Member] | Revinate Holdings, Inc [Member] | Technology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 44,000    
Investments at fair value $ 90,000    
Number of Shares (in shares) 682,034    
Preferred Stock Warrants [Member] | CAMP NYC, Inc [Member] | Technology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 36,000    
Investments at fair value $ 40,000    
Number of Shares (in shares) 112,356    
Preferred Stock Warrants [Member] | LiquiGlide, Inc [Member] | Sustainability Segment [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 39,000    
Investments at fair value $ 25,000    
Number of Shares (in shares) 61,359    
Preferred Stock Warrants [Member] | Elligo Healthcare Research, Inc. [Member] | Healthcare Information and Services Segment [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 191,000    
Investments at fair value $ 92,000    
Number of Shares (in shares) 652,250    
Preferred Stock Warrants [Member] | Onkos Surgical, Inc. [Member] | Life Science Segment [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 192,000    
Investments at fair value $ 187,000    
Number of Shares (in shares) 443,674    
Preferred Stock Warrants [Member] | SIGNiX, Inc [Member] | Technology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 225,000    
Investments at fair value $ 0    
Number of Shares (in shares) 186,235    
Preferred Stock Warrants [Member] | Clara Foods Co [Member] | Technology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 30,000    
Investments at fair value $ 43,000    
Number of Shares (in shares) 46,745    
Preferred Stock Warrants [Member] | Pivot Bio, Inc. [Member] | Sustainability Segment [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 14,000    
Investments at fair value $ 14,000    
Number of Shares (in shares) 210,418    
Preferred Stock Warrants [Member] | NextCar Holding Company, Inc [Member] | Technology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 9,000    
Investments at fair value $ 0    
Number of Shares (in shares) 3,913,723    
Preferred Stock Warrants [Member] | KSQ Therapeutics, Inc. [Member] | Biotechnology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 50,000    
Investments at fair value $ 53,000    
Number of Shares (in shares) 48,076    
Preferred Stock Warrants [Member] | Slingshot Aerospace, Inc. [Member] | Technology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 123,000    
Investments at fair value $ 66,000    
Number of Shares (in shares) 309,208    
Preferred Stock Warrants [Member] | Soli Organic, Inc [Member] | Sustainability Segment [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 382,000    
Investments at fair value $ 10,000    
Number of Shares (in shares) 1,075    
Preferred Stock Warrants [Member] | Medsphere Systems Corporation [Member] | Healthcare Information and Services Segment [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 60,000    
Investments at fair value $ 0    
Number of Shares (in shares) 7,097,792    
Preferred Stock Warrants [Member] | Conventus Orthopaedics, Inc [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 256,000    
Investments at fair value $ 102,000    
Number of Shares (in shares) 9,313,541    
Preferred Stock Warrants [Member] | Sonex Health, Inc. [Member] | Life Science Segment [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 275,000    
Investments at fair value $ 266,000    
Number of Shares (in shares) 2,637,133    
Preferred Stock Warrants [Member] | Supply Network Visiblity Holdings LLC [Member] | Technology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 65,000    
Investments at fair value $ 75,000    
Number of Shares (in shares) 682    
Preferred Stock Warrants [Member] | Divergent Technologies, Inc. [Member] | Technology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 454,000    
Investments at fair value $ 440,000    
Number of Shares (in shares) 45,273    
Preferred Stock Warrants [Member] | Temperpack Technologies, Inc [Member] | Sustainability Segment [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 178,000    
Investments at fair value $ 102,000    
Number of Shares (in shares) 49,693    
Preferred Stock Warrants [Member] | SafelyYou, Inc [Member] | Healthcare Information and Services Segment [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 163,000    
Investments at fair value $ 149,000    
Number of Shares (in shares) 150,353    
Preferred Stock Warrants [Member] | Native Microbials, Inc. [Member] | Biotechnology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 73,000    
Investments at fair value $ 68,000    
Number of Shares (in shares) 112,879    
Preferred Stock Warrants [Member] | Topia Mobility, Inc [Member] | Technology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 138,000    
Investments at fair value $ 0    
Number of Shares (in shares) 30,496    
Preferred Stock Warrants [Member] | InfoBionic, Inc [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 231,000    
Investments at fair value $ 175,000    
Number of Shares (in shares) 5,361,130    
Preferred Stock Warrants [Member] | Spineology, Inc [Member] | Life Science Segment [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 16,000    
Investments at fair value $ 28,000    
Number of Shares (in shares) 2,255,155    
Preferred Stock Warrants [Member] | Ursa Space Systems Inc. [Member] | Technology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 151,000    
Investments at fair value $ 148,000    
Number of Shares (in shares) 1,075,072    
Preferred Stock Warrants [Member] | Lemongrass Holdings, Inc [Member] | Technology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 34,000    
Investments at fair value $ 48,000    
Number of Shares (in shares) 101,308    
Preferred Stock Warrants [Member] | Provivi, Inc. [Member] | Biotechnology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 312,000    
Investments at fair value $ 59,000    
Number of Shares (in shares) 709,980    
Preferred Stock Warrants [Member] | Viken Detection Corporation [Member] | Technology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 120,000    
Investments at fair value $ 234,000    
Number of Shares (in shares) 345,443    
Preferred Stock Warrants [Member] | Intelepeer Holdings, Inc [Member] | Technology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 138,000    
Investments at fair value $ 3,156,000    
Number of Shares (in shares) 2,936,535    
Preferred Stock Warrants [Member] | GT Medical Technologies, Inc. [Member] | Healthcare Information and Services Segment [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 83,000    
Investments at fair value $ 95,000    
Number of Shares (in shares) 195,984    
Preferred Stock Warrants [Member] | xAd, Inc [Member] | Technology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 177,000    
Investments at fair value $ 6,000    
Number of Shares (in shares) 4,343,348    
Preferred Stock Warrants [Member] | Alula Holdings, Inc [Member] | Technology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 93,000    
Investments at fair value $ 7,000    
Number of Shares (in shares) 20,000    
Preferred Stock Warrants [Member] | Tallac Therapeutics, Inc [Member] | Biotechnology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 194,000    
Investments at fair value $ 167,000    
Number of Shares (in shares) 1,600,002    
Preferred Stock Warrants [Member] | Optoro, Inc. [Member] | Technology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 182,000    
Investments at fair value $ 99,000    
Number of Shares (in shares) 11,550    
Preferred Stock Warrants [Member] | Standvast Holdings, LLC [Member] | Technology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 275,000    
Investments at fair value $ 0    
Number of Shares (in shares) 1,225,492    
Preferred Stock Warrants [Member] | Aerin Medical, Inc [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 65,000    
Investments at fair value $ 1,418,000    
Number of Shares (in shares) 1,818,183    
Preferred Stock Warrants [Member] | Aerobiotix, LLC [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 48,000    
Investments at fair value $ 16,000    
Number of Shares (in shares) 8,800    
Preferred Stock Warrants [Member] | Canary Medical Inc. [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 86,000    
Investments at fair value $ 2,000    
Number of Shares (in shares) 12,153    
Preferred Stock Warrants [Member] | Unagi, Inc [Member] | Technology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 32,000    
Investments at fair value $ 0    
Number of Shares (in shares) 171,081    
Preferred Stock Warrants [Member] | MyForest Foods Co [Member] | Technology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 29,000    
Investments at fair value $ 25,000    
Number of Shares (in shares) 250    
Preferred Stock Warrants [Member] | Cognoa, Inc. [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 162,000    
Investments at fair value $ 1,000    
Number of Shares (in shares) 4,635,991    
Preferred Stock Warrants [Member] | CSA Medical, Inc [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 174,000    
Investments at fair value $ 479,000    
Number of Shares (in shares) 4,917,794    
Preferred Stock Warrants [Member] | Britecore Holdings, Inc. [Member] | Technology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 98,000    
Investments at fair value $ 289,000    
Number of Shares (in shares) 161,215    
Preferred Stock Warrants [Member] | Primary Kids, Inc [Member] | Technology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 57,000    
Investments at fair value $ 412,000    
Number of Shares (in shares) 553,778    
Preferred Stock Warrants [Member] | Quip NYC Inc [Member] | Technology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 325,000    
Investments at fair value $ 0    
Number of Shares (in shares) 6,191    
Preferred Stock Warrants [Member] | Updater, Inc [Member] | Technology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 34,000    
Investments at fair value $ 26,000    
Number of Shares (in shares) 108,333    
Preferred Stock Warrants [Member] | CPG Beyond, Inc [Member] | Technology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 242,000    
Investments at fair value $ 231,000    
Number of Shares (in shares) 500,000    
Preferred Stock Warrants [Member] | Silk, Inc [Member] | Technology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 175,000    
Investments at fair value $ 119,000    
Number of Shares (in shares) 394,110    
Preferred Stock Warrants [Member] | Global Worldwide LLC [Member] | Technology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 75,000    
Investments at fair value $ 0    
Number of Shares (in shares) 245,810    
Preferred Stock Warrants [Member] | Rocket Lawyer Incorporated [Member] | Technology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 92,000    
Investments at fair value $ 319,000    
Number of Shares (in shares) 261,721    
Preferred Stock Warrants [Member] | Skillshare, Inc [Member] | Technology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 162,000    
Investments at fair value $ 680,000    
Number of Shares (in shares) 139,074    
Preferred Stock Warrants [Member] | Liqid, Inc [Member] | Technology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 364,000    
Investments at fair value $ 103,000    
Number of Shares (in shares) 344,102    
Preferred Stock Warrants [Member] | Avalanche Technology, Inc [Member] | Technology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 45,000    
Investments at fair value $ 0    
Number of Shares (in shares) 5,938    
Preferred Stock Warrants [Member] | Everstream Holdings, LLC [Member] | Technology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 82,000    
Investments at fair value $ 34,000    
Number of Shares (in shares) 525,000    
Other Investments, Prime Index, Two [Member] | Evelo Biosciences, Inc. [Member] | Biotechnology Sector [Member] | Investment, Affiliated Issuer, Noncontrolled [Member]      
Investments at cost $ 7,634,000    
Investments at fair value 2,832,000    
Restricted Short Term Investments [Member]      
Investments at cost 3,338,000 2,642,000  
Investments at fair value 3,338,000 2,642,000  
Restricted Short Term Investments [Member] | U S Bank Money Market Deposit Account [Member]      
Investments at cost 3,338,000 2,642,000  
Investments at fair value 3,338,000 2,642,000  
Equity Securities [Member]      
Investments at cost 35,942,000 14,443,000  
Investments at fair value 26,198,000 7,889,000  
Equity Securities [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost 9,653,000 6,132,000  
Investments at fair value 8,277,000 4,733,000  
Equity Securities [Member] | Investment, Affiliated Issuer, Noncontrolled [Member]      
Investments at cost 5,000,000    
Investments at fair value 0    
Equity Securities [Member] | Investment, Affiliated Issuer, Controlled [Member]      
Investments at cost 21,289,000    
Investments at fair value 17,921,000    
Equity Securities [Member] | Technology Sector [Member] | Investment, Affiliated Issuer, Controlled [Member]      
Investments at cost   3,311,000  
Investments at fair value   3,024,000  
Equity Securities [Member] | Life Science [Member] | Investment, Affiliated Issuer, Noncontrolled [Member]      
Investments at cost   5,000,000  
Investments at fair value   $ 132,000  
Number of Shares (in shares)    
Debt Securities [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost 660,556,000 $ 692,345,000  
Investments at fair value 631,111,000 664,203,000  
Debt Securities [Member] | Investment, Affiliated Issuer, Controlled [Member]      
Investments at cost 17,611,000    
Investments at fair value 7,668,000    
Debt Securities [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost 263,280,000    
Investments at fair value 261,520,000    
Debt Securities [Member] | Consumer-related Technologies [Member] | Investment, Affiliated Issuer, Controlled [Member]      
Investments at cost   5,335,000  
Investments at fair value   4,969,000  
Debt Securities [Member] | Technology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost 222,699,000 275,026,000  
Investments at fair value 198,350,000 269,790,000  
Debt Securities [Member] | Life Science [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost   249,642,000  
Investments at fair value   244,815,000  
Debt Securities [Member] | Life Science [Member] | Investment, Affiliated Issuer, Noncontrolled [Member]      
Investments at cost   23,551,000  
Investments at fair value   1,000,000  
Debt Securities [Member] | Other Sustainability Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost 67,637,000    
Investments at fair value 67,052,000    
Debt Securities [Member] | Healthcare Information and Services Segment [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost 106,940,000 69,770,000  
Investments at fair value $ 104,189,000 69,770,000  
Debt Securities [Member] | Sustainability Segment [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost   97,907,000  
Investments at fair value   $ 79,828,000  
Debt Securities [Member] | Nexii Building Solutions, Inc [Member] | Other Sustainability Sector [Member] | Investment, Affiliated Issuer, Controlled [Member]      
Cash Rate 10.00%    
Floor 0.00%    
Ceiling 0.00%    
ETP 0.00%    
Maturity Date Jul. 01, 2027    
Principal Amount $ 790,000    
Investments at cost 790,000    
Investments at fair value $ 638,000    
Term Loan, Prime Index Three [Member] | DropOff, Inc. [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 14.00%    
Margin 6.50%    
Floor 9.75%    
Ceiling 0.00%    
ETP 3.50%    
Maturity Date Jun. 01, 2026    
Principal Amount $ 2,617,000    
Investments at cost 2,595,000    
Investments at fair value $ 2,449,000    
Term Loan, Prime Index Three [Member] | Hound Labs, Inc. [Member] | Diagnostics Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 13.50%    
Margin 6.00%    
Floor 9.25%    
Ceiling 0.00%    
ETP 3.50%    
Maturity Date Jun. 01, 2026    
Principal Amount $ 3,214,000    
Investments at cost 3,151,000    
Investments at fair value $ 1,886,000    
Term Loan, Prime Index Three [Member] | Better Place Forests Co. [Member] | Consumer-related Technologies [Member] | Investment, Affiliated Issuer, Controlled [Member]      
Cash Rate 12.00%    
Margin 3.75%    
Floor 12.00%    
Ceiling 0.00%    
ETP 0.00%    
Maturity Date Aug. 01, 2025    
Principal Amount $ 538,000    
Investments at cost 538,000    
Investments at fair value $ 0    
Term Loan, Prime Index Three [Member] | Castle Creek Biosciences, Inc [Member] | Biotechnology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 12.88% 13.25%  
Margin 5.13% 4.75%  
Floor 9.55% 9.55%  
Ceiling 13.50% 13.50%  
ETP 5.50% 5.50%  
Maturity Date May 01, 2026 May 01, 2026  
Principal Amount $ 2,000,000 $ 3,000,000  
Investments at cost 1,996,000 2,987,000  
Investments at fair value $ 1,996,000 $ 2,987,000  
Term Loan, Prime Index Three [Member] | VERO Biotech LLC [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 12.25%    
Margin 3.75%    
Floor 12.25%    
Ceiling 0.00%    
ETP 4.00%    
Maturity Date Jan. 01, 2029    
Principal Amount $ 5,000,000    
Investments at cost 4,912,000    
Investments at fair value $ 4,912,000    
Term Loan, Prime Index Three [Member] | Havenly, Inc. [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 11.00%    
Margin 3.50%    
Floor 10.50%    
Ceiling 0.00%    
ETP 7.78%    
Maturity Date Feb. 01, 2028    
Principal Amount $ 2,813,000    
Investments at cost 2,813,000    
Investments at fair value $ 2,813,000    
Term Loan, Prime Index Three [Member] | Kodiak Robotics, Inc. [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 13.00%    
Margin 5.50%    
Floor 10.25%    
Ceiling 0.00%    
ETP 4.00%    
Maturity Date Apr. 01, 2026    
Principal Amount $ 5,000,000    
Investments at cost 4,978,000    
Investments at fair value $ 4,978,000    
Term Loan, Prime Index Three [Member] | BrightInsight, Inc. [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 13.25%    
Margin 5.50%    
Floor 9.50%    
Ceiling 0.00%    
ETP 3.00%    
Maturity Date Aug. 01, 2027    
Principal Amount $ 3,500,000    
Investments at cost 3,477,000    
Investments at fair value $ 3,477,000    
Term Loan, Prime Index Three [Member] | Axiom Space, Inc [Member] | Communications Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 13.75%    
Margin 6.00%    
Floor 9.25%    
Ceiling 0.00%    
ETP 2.50%    
Maturity Date Jun. 01, 2026    
Principal Amount $ 3,750,000    
Investments at cost 3,731,000    
Investments at fair value $ 3,731,000    
Term Loan, Prime Index Three [Member] | Noodle Partners, Inc. [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 12.50%    
Margin 5.00%    
Floor 12.00%    
Ceiling 0.00%    
ETP 3.00%    
Maturity Date Mar. 01, 2027    
Principal Amount $ 5,000,000    
Investments at cost 4,964,000    
Investments at fair value $ 4,964,000    
Term Loan, Prime Index Three [Member] | Emalex Biosciences, Inc. [Member] | Biotechnology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate   13.22%  
Margin   4.72%  
Floor   9.75%  
Ceiling   0.00%  
ETP   5.00%  
Maturity Date   Nov. 01, 2025  
Principal Amount   $ 5,000,000  
Investments at cost   4,950,000  
Investments at fair value   $ 4,950,000  
Term Loan, Prime Index Three [Member] | Mirantis, Inc [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 11.75%    
Margin 3.50%    
Floor 11.75%    
Ceiling 0.00%    
ETP 4.00%    
Maturity Date Oct. 01, 2028    
Principal Amount $ 5,000,000    
Investments at cost 4,934,000    
Investments at fair value $ 4,934,000    
Term Loan, Prime Index Three [Member] | Elligo Healthcare Research, Inc. [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 11.75%    
Margin 3.50%    
Floor 11.75%    
Ceiling 0.00%    
ETP 4.00%    
Maturity Date Oct. 01, 2027    
Principal Amount $ 5,000,000    
Investments at cost 4,945,000    
Investments at fair value $ 4,945,000    
Term Loan, Prime Index Three [Member] | NextCar Holding Company, Inc [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 13.50%    
Margin 5.75%    
Floor 9.00%    
Ceiling 0.00%    
ETP 5.25%    
Maturity Date Oct. 31, 2023    
Principal Amount $ 2,417,000    
Investments at cost 2,166,000    
Investments at fair value $ 508,000    
Term Loan, Prime Index Three [Member] | Swift Health Systems Inc. [Member] | Medical Device Sector [Member] | Investment, Affiliated Issuer, Controlled [Member]      
Cash Rate 10.25%    
Margin 2.50%    
Floor 2.50%    
Ceiling 0.00%    
ETP 9.14%    
Maturity Date Jun. 01, 2028    
Principal Amount $ 1,948,000    
Investments at cost 1,922,000    
Investments at fair value $ 1,654,000    
Term Loan, Prime Index Three [Member] | Soli Organic, Inc [Member] | Other Sustainability Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 14.25%    
Margin 6.75%    
Floor 10.00%    
Ceiling 0.00%    
ETP 2.75%    
Maturity Date May 01, 2026    
Principal Amount $ 5,000,000    
Investments at cost 4,922,000    
Investments at fair value $ 4,792,000    
Term Loan, Prime Index Three [Member] | Temperpack Technologies, Inc [Member] | Other Sustainability Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 14.25%    
Margin 6.75%    
Floor 10.00%    
Ceiling 0.00%    
ETP 2.50%    
Maturity Date Apr. 01, 2028    
Principal Amount $ 7,500,000    
Investments at cost 7,407,000    
Investments at fair value $ 7,407,000    
Term Loan, Prime Index Three [Member] | PDS Biotechnology Corporation [Member] | Biotechnology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 13.25% 14.25%  
Margin 5.75% 5.75%  
Floor 9.75% 9.75%  
Ceiling 0.00% 0.00%  
ETP 3.75% 3.75%  
Maturity Date Sep. 01, 2026 Sep. 01, 2026  
Principal Amount $ 3,281,000 $ 3,750,000  
Investments at cost 3,267,000 3,717,000  
Investments at fair value $ 3,267,000 $ 3,717,000  
Term Loan, Prime Index Three [Member] | Provivi, Inc. [Member] | Biotechnology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 12.86% 13.86%  
Margin 5.36% 5.36%  
Floor 9.50% 9.50%  
Ceiling 0.00% 0.00%  
ETP 4.31% 5.50%  
Maturity Date Jan. 01, 2027 Dec. 01, 2024  
Principal Amount $ 1,741,000 $ 2,333,000  
Investments at cost 1,705,000 2,281,000  
Investments at fair value $ 1,588,000 2,199,000  
Term Loan, Prime Index Three [Member] | Viken Detection Corporation [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 11.75%    
Margin 4.00%    
Floor 11.75%    
Ceiling 0.00%    
ETP 3.50%    
Maturity Date Jun. 01, 2027    
Principal Amount $ 2,417,000    
Investments at cost 2,396,000    
Investments at fair value $ 2,396,000    
Term Loan, Prime Index Three [Member] | GT Medical Technologies, Inc. [Member] | Other Healthcare Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 11.25%    
Margin 3.25%    
Floor 11.25%    
Ceiling 0.00%    
ETP 4.00%    
Maturity Date Oct. 01, 2029    
Principal Amount $ 7,500,000    
Investments at cost 7,389,000    
Investments at fair value $ 7,389,000    
Term Loan, Prime Index Three [Member] | Supply Network Visibility Holdings, LLC [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 12.00%    
Margin 4.25%    
Floor 12.00%    
Ceiling 0.00%    
ETP 2.50%    
Maturity Date Jun. 01, 2028    
Principal Amount $ 2,500,000    
Investments at cost 2,494,000    
Investments at fair value $ 2,494,000    
Term Loan, Prime Index Three [Member] | Hometeam Technologies, Inc [Member] | Other Healthcare Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 11.25%    
Margin 3.25%    
Floor 11.25%    
Ceiling 0.00%    
ETP 3.50%    
Maturity Date Aug. 01, 2029    
Principal Amount $ 5,000,000    
Investments at cost 4,954,000    
Investments at fair value $ 4,954,000    
Term Loan, Prime Index Three [Member] | Standvast Holdings, LLC [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 12.75%    
Margin 4.25%    
Floor 12.75%    
Ceiling 0.00%    
ETP 3.00%    
Maturity Date Nov. 01, 2028    
Principal Amount $ 2,500,000    
Investments at cost 2,417,000    
Investments at fair value $ 2,343,000    
Term Loan, Prime Index Three [Member] | Unagi, Inc [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 15.25%    
Margin 7.75%    
Floor 11.00%    
Ceiling 0.00%    
ETP 0.00%    
Maturity Date May 01, 2027    
Principal Amount $ 708,000    
Investments at cost 543,000    
Investments at fair value $ 0    
Term Loan, Prime Index Three [Member] | Britecore Holdings, Inc. [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 14.00%    
Margin 5.50%    
Floor 14.00%    
Ceiling 0.00%    
ETP 3.00%    
Maturity Date Oct. 01, 2028    
Principal Amount $ 2,500,000    
Investments at cost 2,472,000    
Investments at fair value $ 2,472,000    
Term Loan, Prime Index Three [Member] | Crafty Holdings, Inc.[Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 12.00%    
Margin 4.50%    
Floor 12.00%    
Ceiling 0.00%    
ETP 4.00%    
Maturity Date Jan. 01, 2029    
Principal Amount $ 5,000,000    
Investments at cost 4,911,000    
Investments at fair value 4,911,000    
Other Investments, Prime Index, Three [Member] | Evelo Biosciences, Inc. [Member] | Biotechnology Sector [Member] | Investment, Affiliated Issuer, Noncontrolled [Member]      
Investments at cost 2,946,000    
Investments at fair value 1,095,000    
Warrant [Member]      
Investments at cost 15,956,000 16,526,000  
Investments at fair value 18,277,000 24,594,000  
Warrant [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost 15,829,000 16,400,000  
Investments at fair value 18,277,000 24,594,000  
Warrant [Member] | Investment, Affiliated Issuer, Noncontrolled [Member]      
Investments at cost 127,000 126,000  
Investments at fair value 0 0  
Warrant [Member] | Technology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost   9,733,000  
Investments at fair value   14,506,000  
Warrant [Member] | Life Science Segment [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost 5,149,000 4,702,000  
Investments at fair value 6,374,000 7,675,000  
Warrant [Member] | Other Sustainability Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost   999,000  
Investments at fair value   $ 542,000  
Number of Shares (in shares)    
Warrant [Member] | Healthcare Information and Services Segment [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost 1,047,000 $ 966,000  
Investments at fair value 1,066,000 1,871,000  
Warrant [Member] | Sustainability Segment [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost 715,000    
Investments at fair value 187,000    
Warrant [Member] | Evelo Biosciences, Inc. [Member] | Biotechnology Sector [Member] | Investment, Affiliated Issuer, Noncontrolled [Member]      
Investments at cost 127,000 126,000  
Investments at fair value $ 0 $ 0  
Number of Shares (in shares) 23,196 23,196  
Other Investments [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost $ 8,465,000    
Investments at fair value 100,000    
Other Investments [Member] | Investment, Affiliated Issuer, Noncontrolled [Member]      
Investments at cost 22,364,000    
Investments at fair value 8,307,000    
Other Investments [Member] | Investment, Affiliated Issuer, Controlled [Member]      
Investments at cost 5,880,000    
Investments at fair value 6,230,000    
Other Investments [Member] | Life Science [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost   $ 1,200,000  
Investments at fair value   200,000  
Other Investments [Member] | Life Science [Member] | Investment, Affiliated Issuer, Controlled [Member]      
Investments at cost   5,782,000  
Investments at fair value   6,230,000  
Other Investments [Member] | HIMV LLC [Member] | Biotechnology Sector [Member] | Investment, Affiliated Issuer, Controlled [Member]      
Investments at cost 5,880,000    
Investments at fair value $ 6,230,000    
Other Investments [Member] | HIMV LLC [Member] | Life Science [Member] | Investment, Affiliated Issuer, Controlled [Member]      
Investments at cost   5,782,000  
Investments at fair value   $ 6,230,000  
Term Loan, Prime Index, Four [Member] | Hound Labs, Inc. [Member] | Diagnostics Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 14.00%    
Margin 0.00%    
Floor 0.00%    
Ceiling 0.00%    
ETP 50.00%    
Maturity Date Mar. 01, 2025    
Principal Amount $ 300,000    
Investments at cost 300,000    
Investments at fair value $ 180,000    
Term Loan, Prime Index, Four [Member] | Better Place Forests Co. [Member] | Consumer-related Technologies [Member] | Investment, Affiliated Issuer, Controlled [Member]      
Cash Rate 12.00%    
Margin 3.75%    
Floor 12.00%    
Ceiling 0.00%    
ETP 0.00%    
Maturity Date Aug. 01, 2025    
Principal Amount $ 532,000    
Investments at cost 532,000    
Investments at fair value $ 0    
Term Loan, Prime Index, Four [Member] | Castle Creek Biosciences, Inc [Member] | Biotechnology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 12.88% 13.25%  
Margin 5.13% 4.75%  
Floor 9.55% 9.55%  
Ceiling 13.50% 13.50%  
ETP 5.50% 5.50%  
Maturity Date May 01, 2026 May 01, 2026  
Principal Amount $ 3,333,000 $ 5,000,000  
Investments at cost 3,326,000 4,979,000  
Investments at fair value $ 3,326,000 $ 4,979,000  
Term Loan, Prime Index, Four [Member] | VERO Biotech LLC [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 12.25%    
Margin 3.75%    
Floor 12.25%    
Ceiling 0.00%    
ETP 4.00%    
Maturity Date Jan. 01, 2029    
Principal Amount $ 2,500,000    
Investments at cost 2,456,000    
Investments at fair value $ 2,456,000    
Term Loan, Prime Index, Four [Member] | Havenly, Inc. [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 11.00%    
Margin 3.50%    
Floor 10.50%    
Ceiling 0.00%    
ETP 7.78%    
Maturity Date Feb. 01, 2028    
Principal Amount $ 2,813,000    
Investments at cost 2,813,000    
Investments at fair value $ 2,813,000    
Term Loan, Prime Index, Four [Member] | Kodiak Robotics, Inc. [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 13.00%    
Margin 5.50%    
Floor 10.25%    
Ceiling 0.00%    
ETP 4.00%    
Maturity Date Apr. 01, 2026    
Principal Amount $ 5,000,000    
Investments at cost 4,978,000    
Investments at fair value $ 4,978,000    
Term Loan, Prime Index, Four [Member] | BrightInsight, Inc. [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 13.25%    
Margin 5.50%    
Floor 9.50%    
Ceiling 0.00%    
ETP 3.00%    
Maturity Date Apr. 01, 2028    
Principal Amount $ 2,750,000    
Investments at cost 2,719,000    
Investments at fair value $ 2,719,000    
Term Loan, Prime Index, Four [Member] | Emalex Biosciences, Inc. [Member] | Biotechnology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate   13.22%  
Margin   4.72%  
Floor   9.75%  
Ceiling   0.00%  
ETP   5.00%  
Maturity Date   May 01, 2026  
Principal Amount   $ 5,000,000  
Investments at cost   4,949,000  
Investments at fair value   $ 4,949,000  
Term Loan, Prime Index, Four [Member] | Mirantis, Inc [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 11.75%    
Margin 3.50%    
Floor 11.75%    
Ceiling 0.00%    
ETP 4.00%    
Maturity Date Oct. 01, 2028    
Principal Amount $ 5,000,000    
Investments at cost 4,934,000    
Investments at fair value $ 4,934,000    
Term Loan, Prime Index, Four [Member] | Elligo Healthcare Research, Inc. [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 11.75%    
Margin 3.50%    
Floor 11.75%    
Ceiling 0.00%    
ETP 4.00%    
Maturity Date Oct. 01, 2027    
Principal Amount $ 5,000,000    
Investments at cost 4,945,000    
Investments at fair value $ 4,945,000    
Term Loan, Prime Index, Four [Member] | NextCar Holding Company, Inc [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 13.50%    
Margin 5.75%    
Floor 9.00%    
Ceiling 0.00%    
ETP 5.25%    
Maturity Date Oct. 31, 2023    
Principal Amount $ 3,021,000    
Investments at cost 2,707,000    
Investments at fair value $ 635,000    
Term Loan, Prime Index, Four [Member] | Swift Health Systems Inc. [Member] | Medical Device Sector [Member] | Investment, Affiliated Issuer, Controlled [Member]      
Cash Rate 10.25%    
Margin 2.50%    
Floor 2.50%    
Ceiling 0.00%    
ETP 9.14%    
Maturity Date Jun. 01, 2028    
Principal Amount $ 1,948,000    
Investments at cost 1,922,000    
Investments at fair value $ 1,654,000    
Term Loan, Prime Index, Four [Member] | Soli Organic, Inc [Member] | Other Sustainability Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 14.25%    
Margin 6.75%    
Floor 10.00%    
Ceiling 0.00%    
ETP 2.75%    
Maturity Date May 01, 2026    
Principal Amount $ 2,500,000    
Investments at cost 2,461,000    
Investments at fair value $ 2,396,000    
Term Loan, Prime Index, Four [Member] | Temperpack Technologies, Inc [Member] | Other Sustainability Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 14.25%    
Margin 6.75%    
Floor 10.00%    
Ceiling 0.00%    
ETP 2.50%    
Maturity Date Apr. 01, 2028    
Principal Amount $ 3,750,000    
Investments at cost 3,704,000    
Investments at fair value $ 3,704,000    
Term Loan, Prime Index, Four [Member] | Provivi, Inc. [Member] | Biotechnology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 12.86% 13.86%  
Margin 5.36% 5.36%  
Floor 9.50% 9.50%  
Ceiling 0.00% 0.00%  
ETP 4.31% 5.50%  
Maturity Date Jan. 01, 2027 Dec. 01, 2024  
Principal Amount $ 1,741,000 $ 2,333,000  
Investments at cost 1,705,000 2,281,000  
Investments at fair value $ 1,588,000 $ 2,199,000  
Term Loan, Prime Index, Four [Member] | Supply Network Visibility Holdings, LLC [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 12.00%    
Margin 4.25%    
Floor 12.00%    
Ceiling 0.00%    
ETP 2.50%    
Maturity Date Jun. 01, 2028    
Principal Amount $ 1,500,000    
Investments at cost 1,496,000    
Investments at fair value $ 1,496,000    
Term Loan, Prime Index, Four [Member] | Hometeam Technologies, Inc [Member] | Other Healthcare Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 11.25%    
Margin 3.25%    
Floor 11.25%    
Ceiling 0.00%    
ETP 3.50%    
Maturity Date Aug. 01, 2029    
Principal Amount $ 5,000,000    
Investments at cost 4,954,000    
Investments at fair value $ 4,954,000    
Term Loan, Prime Index, Four [Member] | Britecore Holdings, Inc. [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 14.00%    
Margin 5.50%    
Floor 14.00%    
Ceiling 0.00%    
ETP 3.00%    
Maturity Date Oct. 01, 2028    
Principal Amount $ 2,500,000    
Investments at cost 2,472,000    
Investments at fair value 2,472,000    
Other Investments, Prime Index, Four [Member] | Evelo Biosciences, Inc. [Member] | Biotechnology Sector [Member] | Investment, Affiliated Issuer, Noncontrolled [Member]      
Investments at cost 2,946,000    
Investments at fair value $ 1,095,000    
Term Loan, Prime Index, Five [Member] | Hound Labs, Inc. [Member] | Diagnostics Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 14.00%    
Margin 0.00%    
Floor 0.00%    
Ceiling 0.00%    
ETP 100.00%    
Maturity Date Mar. 01, 2025    
Principal Amount $ 250,000    
Investments at cost 250,000    
Investments at fair value $ 150,000    
Term Loan, Prime Index, Five [Member] | Better Place Forests Co. [Member] | Consumer-related Technologies [Member] | Investment, Affiliated Issuer, Controlled [Member]      
Cash Rate 12.00%    
Margin 3.75%    
Floor 12.00%    
Ceiling 0.00%    
ETP 0.00%    
Maturity Date Aug. 01, 2025    
Principal Amount $ 521,000    
Investments at cost 521,000    
Investments at fair value $ 0    
Term Loan, Prime Index, Five [Member] | Castle Creek Biosciences, Inc [Member] | Biotechnology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 12.88% 13.25%  
Margin 5.13% 4.75%  
Floor 9.55% 9.55%  
Ceiling 13.50% 13.50%  
ETP 5.50% 5.50%  
Maturity Date May 01, 2026 May 01, 2026  
Principal Amount $ 3,333,000 $ 5,000,000  
Investments at cost 3,326,000 4,979,000  
Investments at fair value $ 3,326,000 $ 4,979,000  
Term Loan, Prime Index, Five [Member] | NextCar Holding Company, Inc [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 13.50%    
Margin 5.75%    
Floor 9.00%    
Ceiling 0.00%    
ETP 5.25%    
Maturity Date Oct. 31, 2023    
Principal Amount $ 3,625,000    
Investments at cost 3,249,000    
Investments at fair value $ 762,000    
Term Loan, Prime Index, Five [Member] | Swift Health Systems Inc. [Member] | Medical Device Sector [Member] | Investment, Affiliated Issuer, Controlled [Member]      
Cash Rate 10.25%    
Margin 2.50%    
Floor 2.50%    
Ceiling 0.00%    
ETP 100.00%    
Maturity Date Jun. 01, 2028    
Principal Amount $ 315,000    
Investments at cost 315,000    
Investments at fair value $ 271,000    
Term Loan, Prime Index, Five [Member] | Soli Organic, Inc [Member] | Other Sustainability Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 13.00%    
Margin 5.50%    
Floor 11.75%    
Ceiling 0.00%    
ETP 2.75%    
Maturity Date Dec. 01, 2026    
Principal Amount $ 5,000,000    
Investments at cost 4,925,000    
Investments at fair value $ 4,795,000    
Term Loan, Prime Index, Five [Member] | Temperpack Technologies, Inc [Member] | Other Sustainability Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 14.25%    
Margin 6.75%    
Floor 10.00%    
Ceiling 0.00%    
ETP 2.50%    
Maturity Date Apr. 01, 2028    
Principal Amount $ 3,750,000    
Investments at cost 3,704,000    
Investments at fair value $ 3,704,000    
Term Loan, Prime Index, Five [Member] | Provivi, Inc. [Member] | Biotechnology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 12.86% 13.86%  
Margin 5.36% 5.36%  
Floor 9.50% 9.50%  
Ceiling 0.00% 0.00%  
ETP 4.31% 5.50%  
Maturity Date Jan. 01, 2027 Dec. 01, 2024  
Principal Amount $ 1,741,000 $ 2,333,000  
Investments at cost 1,704,000 2,278,000  
Investments at fair value $ 1,587,000 $ 2,196,000  
Term Loan, Prime Index, Five [Member] | Supply Network Visibility Holdings, LLC [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 12.00%    
Margin 4.25%    
Floor 12.00%    
Ceiling 0.00%    
ETP 2.50%    
Maturity Date Jul. 01, 2029    
Principal Amount $ 5,000,000    
Investments at cost 4,984,000    
Investments at fair value $ 4,984,000    
Term Loan, Prime Index, Five [Member] | Hometeam Technologies, Inc [Member] | Other Healthcare Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 11.25%    
Margin 3.25%    
Floor 11.25%    
Ceiling 0.00%    
ETP 3.50%    
Maturity Date Aug. 01, 2029    
Principal Amount $ 5,000,000    
Investments at cost 4,954,000    
Investments at fair value $ 4,954,000    
Term Loan, Prime Index, Five [Member] | Britecore Holdings, Inc. [Member] | Software Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 14.00%    
Margin 5.50%    
Floor 14.00%    
Ceiling 0.00%    
ETP 3.00%    
Maturity Date Apr. 01, 2029    
Principal Amount $ 2,500,000    
Investments at cost 2,469,000    
Investments at fair value 2,469,000    
Other Investments, Prime Index, Five [Member] | Evelo Biosciences, Inc. [Member] | Biotechnology Sector [Member] | Investment, Affiliated Issuer, Noncontrolled [Member]      
Investments at cost 1,964,000    
Investments at fair value $ 730,000    
Term Loan, Prime Index, Six [Member] | Better Place Forests Co. [Member] | Consumer-related Technologies [Member] | Investment, Affiliated Issuer, Controlled [Member]      
Cash Rate 12.00%    
Margin 3.75%    
Floor 12.00%    
Ceiling 0.00%    
ETP 0.00%    
Maturity Date Aug. 01, 2025    
Principal Amount $ 513,000    
Investments at cost 513,000    
Investments at fair value $ 0    
Term Loan, Prime Index, Six [Member] | Castle Creek Biosciences, Inc [Member] | Biotechnology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 12.88% 13.25%  
Margin 5.13% 4.75%  
Floor 9.55% 9.55%  
Ceiling 13.50% 13.50%  
ETP 5.50% 5.50%  
Maturity Date May 01, 2026 May 01, 2026  
Principal Amount $ 2,000,000 $ 3,000,000  
Investments at cost 1,996,000 2,987,000  
Investments at fair value $ 1,996,000 $ 2,987,000  
Term Loan, Prime Index, Six [Member] | NextCar Holding Company, Inc [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 13.50%    
Margin 5.75%    
Floor 9.00%    
Ceiling 0.00%    
ETP 5.25%    
Maturity Date Oct. 31, 2023    
Principal Amount $ 3,021,000    
Investments at cost 2,707,000    
Investments at fair value $ 635,000    
Term Loan, Prime Index, Six [Member] | Swift Health Systems Inc. [Member] | Medical Device Sector [Member] | Investment, Affiliated Issuer, Controlled [Member]      
Cash Rate 10.25%    
Margin 2.50%    
Floor 2.50%    
Ceiling 0.00%    
ETP 100.00%    
Maturity Date Jun. 01, 2028    
Principal Amount $ 156,000    
Investments at cost 156,000    
Investments at fair value $ 135,000    
Term Loan, Prime Index, Six [Member] | Soli Organic, Inc [Member] | Other Sustainability Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 13.00%    
Margin 5.50%    
Floor 11.75%    
Ceiling 0.00%    
ETP 2.75%    
Maturity Date Dec. 01, 2026    
Principal Amount $ 2,500,000    
Investments at cost 2,462,000    
Investments at fair value $ 2,397,000    
Term Loan, Prime Index, Six [Member] | Temperpack Technologies, Inc [Member] | Other Sustainability Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 13.50%    
Margin 6.00%    
Floor 10.00%    
Ceiling 0.00%    
ETP 2.00%    
Maturity Date Jan. 01, 2029    
Principal Amount $ 4,500,000    
Investments at cost 4,454,000    
Investments at fair value $ 4,454,000    
Term Loan, Prime Index, Six [Member] | Provivi, Inc. [Member] | Biotechnology Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 12.86% 13.86%  
Margin 5.36% 5.36%  
Floor 9.50% 9.50%  
Ceiling 0.00% 0.00%  
ETP 4.31% 5.50%  
Maturity Date Jan. 01, 2027 Dec. 01, 2024  
Principal Amount $ 1,741,000 $ 2,333,000  
Investments at cost 1,704,000 2,278,000  
Investments at fair value 1,587,000 $ 2,196,000  
Other Investments, Prime Index, Six [Member] | Evelo Biosciences, Inc. [Member] | Biotechnology Sector [Member] | Investment, Affiliated Issuer, Noncontrolled [Member]      
Investments at cost 1,964,000    
Investments at fair value $ 730,000    
Term Loan, Prime Index, Seven [Member] | Better Place Forests Co. [Member] | Consumer-related Technologies [Member] | Investment, Affiliated Issuer, Controlled [Member]      
Cash Rate 12.00%    
Margin 3.75%    
Floor 12.00%    
Ceiling 0.00%    
ETP 0.00%    
Maturity Date Aug. 01, 2025    
Principal Amount $ 505,000    
Investments at cost 505,000    
Investments at fair value $ 0    
Term Loan, Prime Index, Seven [Member] | NextCar Holding Company, Inc [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 13.50%    
Margin 5.75%    
Floor 9.00%    
Ceiling 0.00%    
ETP 5.25%    
Maturity Date Oct. 31, 2023    
Principal Amount $ 6,042,000    
Investments at cost 5,415,000    
Investments at fair value $ 1,271,000    
Term Loan, Prime Index, Seven [Member] | Temperpack Technologies, Inc [Member] | Other Sustainability Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 13.50%    
Margin 6.00%    
Floor 10.00%    
Ceiling 0.00%    
ETP 2.00%    
Maturity Date Jan. 01, 2029    
Principal Amount $ 2,000,000    
Investments at cost 1,980,000    
Investments at fair value $ 1,980,000    
Term Loan, Prime Index, Eight [Member] | NextCar Holding Company, Inc [Member] | Consumer-related Technologies [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 13.50%    
Margin 5.75%    
Floor 9.00%    
Ceiling 0.00%    
ETP 5.25%    
Maturity Date Oct. 31, 2023    
Principal Amount $ 3,021,000    
Investments at cost 2,707,000    
Investments at fair value 635,000    
Royalty Agreement [Member] | Robin Healthcare, Inc. [Member] | Life Science Segment [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost 7,319,000    
Investments at fair value 0    
Royalty Agreement [Member] | Lumithera, Inc. [Member] | Life Science Segment [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost 1,146,000    
Investments at fair value $ 100,000    
Term Loan, Fixed Index One [Member] | Aerobiotix, LLC [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 9.00%    
Margin 0.00%    
Floor 0.00%    
Ceiling 0.00%    
ETP 18.00%    
Maturity Date Apr. 01, 2028    
Principal Amount $ 2,500,000    
Investments at cost 2,480,000    
Investments at fair value $ 2,085,000    
Term Loan, Fixed Index Two [Member] | Aerobiotix, LLC [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 9.00%    
Margin 0.00%    
Floor 0.00%    
Ceiling 0.00%    
ETP 18.00%    
Maturity Date Apr. 01, 2028    
Principal Amount $ 2,500,000    
Investments at cost 2,480,000    
Investments at fair value $ 2,085,000    
Term Loan, Fixed Index Three [Member] | Aerobiotix, LLC [Member] | Medical Device Sector [Member] | Investment, Unaffiliated Issuer [Member]      
Cash Rate 9.00%    
Margin 0.00%    
Floor 0.00%    
Ceiling 0.00%    
ETP 18.00%    
Maturity Date Apr. 01, 2028    
Principal Amount $ 200,000    
Investments at cost 190,000    
Investments at fair value 160,000    
Preferred Stock 2 [Member] | Lotame Solutions, Inc. [Member] | Investment, Unaffiliated Issuer [Member]      
Investments at cost 29,000    
Investments at fair value $ 29,000    
Number of Shares (in shares) 9,381    
[1] As of December 31, 2023, the Company no longer owns 5% of more of the portfolio company.