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Note 5 - Transactions With Affiliated Companies - Schedule of Investments in Affiliated Companies 2 (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Investments, fair value     $ 647,244  
Interest Income, Operating, Paid in Kind $ 1,600 $ 200 2,844 $ 528
Net unrealized appreciation (depreciation) on non-affiliate investments (38,533) (22,156) (43,133) (54,313)
Investments, fair value 676,711   676,711  
Net realized loss on investments (6,122) (9,294) (6,283) (9,293)
Net realized gain (loss) (6,122) (9,294) (6,283) (9,293)
Investment, Identifier [Axis]: ControlledAffiliatedBetterPlaceForestsCoMember        
Investments, fair value   879   0
Purchases   1,107   2,048
Reductions   0   0
Interest Income, Operating, Paid in Kind   0   0
Transfers in/(out) at fair value   0   0
Discount accretion   0  
Net unrealized appreciation (depreciation) on non-affiliate investments   (1,107)   (1,169)
Investments, fair value   879   879
Interest income   0   0
Net realized loss on investments   0   0
Net realized gain (loss)   0   0
Investment, Identifier [Axis]: ControlledAffiliatedHIMVLLCMember        
Investments, fair value   5,290   6,230
Purchases   0   0
Reductions   0   0
Interest Income, Operating, Paid in Kind   0   0
Transfers in/(out) at fair value   0   0
Discount accretion   0   0
Net unrealized appreciation (depreciation) on non-affiliate investments   (4,425)   (5,365)
Investments, fair value   865   865
Interest income   0   0
Net realized loss on investments   0   0
Net realized gain (loss)   0   0
Investment, Identifier [Axis]: ControlledAffiliatedMember        
Investments, fair value 0 14,869 0 31,819
Purchases 215 1,255 215 4,205
Reductions 0 0 0 0
Interest Income, Operating, Paid in Kind 0 0 0 208
Transfers in/(out) at fair value 0 0 0 0
Discount accretion 0 0 0 9
Net unrealized appreciation (depreciation) on non-affiliate investments 0 (5,669) 0 (25,786)
Investments, fair value 215 10,455 215 10,455
Interest income 0 20 0 (41)
Net realized loss on investments 0 0 0 0
Net realized gain (loss) 0 0 0 0
Investment, Identifier [Axis]: ControlledAffiliatedNexiiIncMember        
Investments, fair value   8,700   8,547
Purchases   11   11
Reductions   0   0
Interest Income, Operating, Paid in Kind   0   0
Transfers in/(out) at fair value   0   0
Discount accretion   0   0
Net unrealized appreciation (depreciation) on non-affiliate investments   0   153
Investments, fair value   8,711   8,711
Interest income   20   40
Net realized loss on investments   0   0
Net realized gain (loss)   0   0
Investment, Identifier [Axis]: ControlledAffiliatedRoHoCapitalOpportunityFundLLCMember        
Investments, fair value [1] 0   0  
Purchases [1] 215   215  
Reductions [1]    
Interest Income, Operating, Paid in Kind [1] 0   0  
Transfers in/(out) at fair value [1] 0   0  
Discount accretion [1] 0   0  
Net unrealized appreciation (depreciation) on non-affiliate investments [1]    
Investments, fair value [1] 215   215  
Interest income [1] 0   0  
Net realized loss on investments [1]    
Net realized gain (loss) [1]    
Investment, Identifier [Axis]: ControlledAffiliatedSwiftHealthSystemsIncMember        
Investments, fair value   0   17,042
Purchases   137   2,146
Reductions   0   0
Interest Income, Operating, Paid in Kind   0   208
Transfers in/(out) at fair value   0   0
Discount accretion   0   9
Net unrealized appreciation (depreciation) on non-affiliate investments   (137)   (19,405)
Investments, fair value   0   0
Interest income   0   (81)
Net realized loss on investments   0   0
Net realized gain (loss)   0   0
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsHealthcareBrightInsightIncSoftwareTermLoanFiveMember        
Investments, fair value     2,535  
Investments, fair value 2,046   2,046  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsHealthcareBrightInsightIncSoftwareTermLoanFourMember        
Investments, fair value     2,969  
Investments, fair value 2,395   2,395  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsHealthcareBrightInsightIncSoftwareTermLoanOneMember        
Investments, fair value     5,105  
Investments, fair value 4,110   4,110  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsHealthcareBrightInsightIncSoftwareTermLoanSixMember        
Investments, fair value     2,089  
Investments, fair value 1,682   1,682  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsHealthcareBrightInsightIncSoftwareTermLoanThreeMember        
Investments, fair value     2,969  
Investments, fair value 2,395   2,395  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsHealthcareBrightInsightIncSoftwareTermLoanTwoMember        
Investments, fair value     5,939  
Investments, fair value 4,788   4,788  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsHealthcareElligoHealthResearchIncSoftwareTermLoanFourMember        
Investments, fair value     4,968  
Investments, fair value 4,954   4,954  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsHealthcareElligoHealthResearchIncSoftwareTermLoanOneMember        
Investments, fair value     9,936  
Investments, fair value 9,908   9,908  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsHealthcareElligoHealthResearchIncSoftwareTermLoanThreeMember        
Investments, fair value     4,968  
Investments, fair value 4,954   4,954  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsHealthcareElligoHealthResearchIncSoftwareTermLoanTwoMember        
Investments, fair value     4,968  
Investments, fair value 4,954   4,954  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsHealthcareGTMedicalTechnologiesIncOtherHealthcareServicesTermLoanOneMember        
Investments, fair value     3,604  
Investments, fair value 3,710   3,710  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsHealthcareGTMedicalTechnologiesIncOtherHealthcareServicesTermLoanThreeMember        
Investments, fair value     7,409  
Investments, fair value 7,420   7,420  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsHealthcareGTMedicalTechnologiesIncOtherHealthcareServicesTermLoanTwoMember        
Investments, fair value     3,705  
Investments, fair value 3,710   3,710  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsHealthcareHometeamTechnologiesIncOtherHealthcareServicesTermLoanFiveMember        
Investments, fair value     3,967  
Investments, fair value 3,000   3,000  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsHealthcareHometeamTechnologiesIncOtherHealthcareServicesTermLoanFourMember        
Investments, fair value     3,967  
Investments, fair value 3,000   3,000  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsHealthcareHometeamTechnologiesIncOtherHealthcareServicesTermLoanOneMember        
Investments, fair value     3,967  
Investments, fair value 3,000   3,000  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsHealthcareHometeamTechnologiesIncOtherHealthcareServicesTermLoanThreeMember        
Investments, fair value     3,883  
Investments, fair value 3,000   3,000  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsHealthcareHometeamTechnologiesIncOtherHealthcareServicesTermLoanTwoMember        
Investments, fair value     3,967  
Investments, fair value 3,000   3,000  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsHealthcareInformationAndServicesMember        
Investments, fair value     80,915  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsHealthcareInformationandServicesMember        
Investments, fair value 72,026   72,026  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceAviveSolutionsIncMedicalDeviceTermLoanFiveMember        
Investments, fair value 2,466   2,466  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceAviveSolutionsIncMedicalDeviceTermLoanFourMember        
Investments, fair value 2,466   2,466  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceAviveSolutionsIncMedicalDeviceTermLoanOneMember        
Investments, fair value 4,932   4,932  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceAviveSolutionsIncMedicalDeviceTermLoanSixMember        
Investments, fair value 2,466   2,466  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceAviveSolutionsIncMedicalDeviceTermLoanThreeMember        
Investments, fair value 2,466   2,466  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceAviveSolutionsIncMedicalDeviceTermLoanTwoMember        
Investments, fair value 4,932   4,932  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceCastleCreekBiosciencesBiotechnologyTermLoanFourMember        
Investments, fair value     4,974  
Investments, fair value 4,981   4,981  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceCastleCreekBiosciencesBiotechnologyTermLoanOneMember        
Investments, fair value     9,947  
Investments, fair value 9,962   9,962  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceCastleCreekBiosciencesBiotechnologyTermLoanThreeMember        
Investments, fair value     4,974  
Investments, fair value 4,981   4,981  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceCastleCreekBiosciencesBiotechnologyTermLoanTwoMember        
Investments, fair value     5,471  
Investments, fair value 5,479   5,479  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceCeribellIncMedicalDeviceTermLoanOneMember        
Investments, fair value     4,833  
Investments, fair value 4,961   4,961  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceCeribellIncMedicalDeviceTermLoanThreeMember        
Investments, fair value     3,963  
Investments, fair value 4,880   4,880  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceCeribellIncMedicalDeviceTermLoanTwoMember        
Investments, fair value     4,954  
Investments, fair value 3,969   3,969  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceConventusOrthopaedicsIncMedicalDeviceTermLoanOneMember        
Investments, fair value     2,785  
Investments, fair value 2,801   2,801  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceConventusOrthopaedicsIncMedicalDeviceTermLoanTwoMember        
Investments, fair value     2,785  
Investments, fair value 2,801   2,801  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceEmalexBiosciencesIncBiotechnologyTermLoanOneMember        
Investments, fair value     1,665  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceHyperfineIncMedicalDeviceTermLoanOneMember        
Investments, fair value 4,614   4,614  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceHyperfineIncMedicalDeviceTermLoanThreeMember        
Investments, fair value 4,912   4,912  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceHyperfineIncMedicalDeviceTermLoanTwoMember        
Investments, fair value 4,912   4,912  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceInfobionicIncMedicalDeviceTermLoanFiveMember        
Investments, fair value     2,429  
Investments, fair value 2,414   2,414  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceInfobionicIncMedicalDeviceTermLoanFourMember        
Investments, fair value     2,379  
Investments, fair value 2,152   2,152  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceInfobionicIncMedicalDeviceTermLoanOneMember        
Investments, fair value     4,937  
Investments, fair value 4,946   4,946  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceInfobionicIncMedicalDeviceTermLoanThreeMember        
Investments, fair value     4,937  
Investments, fair value 4,946   4,946  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceInfobionicIncMedicalDeviceTermLoanTwoMember        
Investments, fair value     4,937  
Investments, fair value 4,946   4,946  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceKSQTherapeuticsIncBiotechnologyTermLoanFourMember        
Investments, fair value     4,237  
Investments, fair value 3,489   3,489  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceKSQTherapeuticsIncBiotechnologyTermLoanOneMember        
Investments, fair value     4,237  
Investments, fair value 3,489   3,489  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceKSQTherapeuticsIncBiotechnologyTermLoanThreeMember        
Investments, fair value     4,237  
Investments, fair value 3,489   3,489  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceKSQTherapeuticsIncBiotechnologyTermLoanTwoMember        
Investments, fair value     4,237  
Investments, fair value 3,489   3,489  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceLongGrovePharmaceuticalsBiotechnologyTermLoanMember        
Investments, fair value     10,086  
Investments, fair value 10,531   10,531  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceMMLUSIncMedicalDeviceTermLoanFiveMember        
Investments, fair value     5,046  
Investments, fair value 5,169   5,169  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceMMLUSIncMedicalDeviceTermLoanFourMember        
Investments, fair value     5,086  
Investments, fair value 5,169   5,169  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceMMLUSIncMedicalDeviceTermLoanOneMember        
Investments, fair value     2,444  
Investments, fair value 2,534   2,534  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceMMLUSIncMedicalDeviceTermLoanSixMember        
Investments, fair value     5,046  
Investments, fair value 5,129   5,129  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceMMLUSIncMedicalDeviceTermLoanThreeMember        
Investments, fair value     5,086  
Investments, fair value 2,584   2,584  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceMMLUSIncMedicalDeviceTermLoanTwoMember        
Investments, fair value     2,543  
Investments, fair value 3,717   3,717  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceMember        
Investments, fair value     271,276  
Investments, fair value 305,677   305,677  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceMobiaMedicalIncMedicalDeviceTermLoanOneMember        
Investments, fair value     3,710  
Investments, fair value 3,717   3,717  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceMobiaMedicalIncMedicalDeviceTermLoanTwoMember        
Investments, fair value     3,710  
Investments, fair value 2,439   2,439  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceOnkosSurgicalIncMedicalDeviceTermLoanFiveMember        
Investments, fair value     4,926  
Investments, fair value 9,890   9,890  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceOnkosSurgicalIncMedicalDeviceTermLoanFourMember        
Investments, fair value     4,937  
Investments, fair value 4,952   4,952  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceOnkosSurgicalIncMedicalDeviceTermLoanOneMember        
Investments, fair value     9,874  
Investments, fair value 9,890   9,890  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceOnkosSurgicalIncMedicalDeviceTermLoanThreeMember        
Investments, fair value     4,937  
Investments, fair value 4,952   4,952  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceOnkosSurgicalIncMedicalDeviceTermLoanTwoMember        
Investments, fair value     9,874  
Investments, fair value 5,129   5,129  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceOssioIncMedicalDeviceTermLoanOneMember        
Investments, fair value 12,436   12,436  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceOssioIncMedicalDeviceTermLoanThreeMember        
Investments, fair value 4,945   4,945  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceOssioIncMedicalDeviceTermLoanTwoMember        
Investments, fair value 4,945   4,945  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeSciencePelthosTherapeuticsIncBiotechnologyTermLoanFourMember        
Investments, fair value 4,898   4,898  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeSciencePelthosTherapeuticsIncBiotechnologyTermLoanOneMember        
Investments, fair value 9,796   9,796  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeSciencePelthosTherapeuticsIncBiotechnologyTermLoanThreeMember        
Investments, fair value 4,898   4,898  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeSciencePelthosTherapeuticsIncBiotechnologyTermLoanTwoMember        
Investments, fair value 9,796   9,796  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceProviviBiotechnologyTermLoanFiveMember        
Investments, fair value     460  
Investments, fair value 397   397  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceProviviBiotechnologyTermLoanFourMember        
Investments, fair value     460  
Investments, fair value 397   397  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceProviviBiotechnologyTermLoanOneMember        
Investments, fair value     924  
Investments, fair value 795   795  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceProviviBiotechnologyTermLoanSixMember        
Investments, fair value     460  
Investments, fair value 396   396  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceProviviBiotechnologyTermLoanThreeMember        
Investments, fair value     460  
Investments, fair value 397   397  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceProviviBiotechnologyTermLoanTwoMember        
Investments, fair value     924  
Investments, fair value 795   795  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceScientiaVascularIncMedicalDeviceTermLoanFiveMember        
Investments, fair value     3,459  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceScientiaVascularIncMedicalDeviceTermLoanFourMember        
Investments, fair value     1,483  
Investments, fair value 2,477   2,477  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceScientiaVascularIncMedicalDeviceTermLoanOneMember        
Investments, fair value     9,890  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceScientiaVascularIncMedicalDeviceTermLoanThreeMember        
Investments, fair value     4,945  
Investments, fair value 7,462   7,462  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceScientiaVascularIncMedicalDeviceTermLoanTwoMember        
Investments, fair value     9,890  
Investments, fair value 4,933   4,933  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceSonexHealthIncMedicalDeviceTermLoanEightMember        
Investments, fair value     3,725  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceSonexHealthIncMedicalDeviceTermLoanFiveMember        
Investments, fair value     3,725  
Investments, fair value 2,465   2,465  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceSonexHealthIncMedicalDeviceTermLoanFourMember        
Investments, fair value     4,977  
Investments, fair value 3,697   3,697  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceSonexHealthIncMedicalDeviceTermLoanOneMember        
Investments, fair value     2,489  
Investments, fair value 9,758   9,758  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceSonexHealthIncMedicalDeviceTermLoanSevenMember        
Investments, fair value     3,725  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceSonexHealthIncMedicalDeviceTermLoanSixMember        
Investments, fair value     3,725  
Investments, fair value 2,465   2,465  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceSonexHealthIncMedicalDeviceTermLoanThreeMember        
Investments, fair value     4,977  
Investments, fair value 3,697   3,697  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceSonexHealthIncMedicalDeviceTermLoanTwoMember        
Investments, fair value     2,489  
Investments, fair value 9,858   9,858  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceSpineologyIncMedicalDeviceTermLoanFourMember        
Investments, fair value     2,468  
Investments, fair value 2,474   2,474  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceSpineologyIncMedicalDeviceTermLoanOneMember        
Investments, fair value     4,936  
Investments, fair value 4,947   4,947  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceSpineologyIncMedicalDeviceTermLoanThreeMember        
Investments, fair value     4,196  
Investments, fair value 4,205   4,205  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceSpineologyIncMedicalDeviceTermLoanTwoMember        
Investments, fair value     4,195  
Investments, fair value 4,205   4,205  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceVeroBiotechIncMedicalDeviceTermLoanFourMember        
Investments, fair value     2,466  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceVeroBiotechIncMedicalDeviceTermLoanOneMember        
Investments, fair value     14,803  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceVeroBiotechIncMedicalDeviceTermLoanThreeMember        
Investments, fair value     4,933  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsLifeScienceVeroBiotechIncMedicalDeviceTermLoanTwoMember        
Investments, fair value     9,869  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsMember        
Investments, fair value     558,778  
Investments, fair value 628,088   628,088  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsSustainabilityMember        
Investments, fair value     4,869  
Investments, fair value 5,925   5,925  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsSustainabilityPhigenicsHoldingsIncOtherSustainabilityTermLoanOneMember        
Investments, fair value 4,937   4,937  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsSustainabilityPhigenicsHoldingsIncOtherSustainabilityTermLoanTwoMember        
Investments, fair value 988   988  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsSustainabilitySparkChargeIncAlternativeEnergyTermLoanOneMember        
Investments, fair value     2,398  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsSustainabilitySparkChargeIncAlternativeEnergyTermLoanTwoMember        
Investments, fair value     2,471  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsTechnologyApkudoIncSoftwareTermLoanOneMember        
Investments, fair value     4,908  
Investments, fair value 4,921   4,921  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsTechnologyApkudoIncSoftwareTermLoanTwoMember        
Investments, fair value     4,908  
Investments, fair value 4,921   4,921  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsTechnologyBastilleBuyerIncSoftwareTermLoanOneMember        
Investments, fair value 2,955   2,955  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsTechnologyBriteCoreHoldingsIncSoftwareTermLoanOneMember        
Investments, fair value     9,831  
Investments, fair value 9,842   9,842  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsTechnologyBriteCoreHoldingsIncSoftwareTermLoanThreeMember        
Investments, fair value     2,470  
Investments, fair value 2,473   2,473  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsTechnologyBriteCoreHoldingsIncSoftwareTermLoanTwoMember        
Investments, fair value     7,410  
Investments, fair value 7,419   7,419  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsTechnologyCraftyHoldingsIncSoftwareTermLoanFiveMember        
Investments, fair value 1,472   1,472  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsTechnologyCraftyHoldingsIncSoftwareTermLoanFourMember        
Investments, fair value     1,969  
Investments, fair value 1,974   1,974  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsTechnologyCraftyHoldingsIncSoftwareTermLoanOneMember        
Investments, fair value     4,894  
Investments, fair value 4,944   4,944  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsTechnologyCraftyHoldingsIncSoftwareTermLoanThreeMember        
Investments, fair value     4,933  
Investments, fair value 4,944   4,944  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsTechnologyCraftyHoldingsIncSoftwareTermLoanTwoMember        
Investments, fair value     4,933  
Investments, fair value 4,944   4,944  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsTechnologyDropoffIncSoftwareTermLoanFourMember        
Investments, fair value     1,468  
Investments, fair value 2,939   2,939  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsTechnologyDropoffIncSoftwareTermLoanOneMember        
Investments, fair value     4,411  
Investments, fair value 4,771   4,771  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsTechnologyDropoffIncSoftwareTermLoanThreeMember        
Investments, fair value     3,520  
Investments, fair value 5,407   5,407  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsTechnologyDropoffIncSoftwareTermLoanTwoMember        
Investments, fair value     3,813  
Investments, fair value 1,096   1,096  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsTechnologyGlassRoutesLLCCommunicationsTermLoanTwoMember        
Investments, fair value 838   838  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsTechnologyHappyCoIncSoftwareTermLoanFourMember        
Investments, fair value     1,975  
Investments, fair value 1,979   1,979  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsTechnologyHappyCoIncSoftwareTermLoanOneMember        
Investments, fair value     2,969  
Investments, fair value 2,974   2,974  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsTechnologyHappyCoIncSoftwareTermLoanThreeMember        
Investments, fair value     1,978  
Investments, fair value 1,981   1,981  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsTechnologyHappyCoIncSoftwareTermLoanTwoMember        
Investments, fair value     2,969  
Investments, fair value 2,974   2,974  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsTechnologyHavenlyIncConsumerrelatedTechnologiesTermLoanFiveMember        
Investments, fair value     2,813  
Investments, fair value 2,809   2,809  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsTechnologyHavenlyIncConsumerrelatedTechnologiesTermLoanFourMember        
Investments, fair value     2,813  
Investments, fair value 2,809   2,809  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsTechnologyHavenlyIncConsumerrelatedTechnologiesTermLoanOneMember        
Investments, fair value     982  
Investments, fair value 1,057   1,057  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsTechnologyHavenlyIncConsumerrelatedTechnologiesTermLoanThreeMember        
Investments, fair value     3,374  
Investments, fair value 3,370   3,370  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsTechnologyHavenlyIncConsumerrelatedTechnologiesTermLoanTwoMember        
Investments, fair value     1,482  
Investments, fair value 1,590   1,590  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsTechnologyHiveMQIncSoftwareTermLoanFiveMember        
Investments, fair value 4,950   4,950  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsTechnologyHiveMQIncSoftwareTermLoanFourMember        
Investments, fair value 4,950   4,950  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsTechnologyHiveMQIncSoftwareTermLoanOneMember        
Investments, fair value 4,800   4,800  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsTechnologyHiveMQIncSoftwareTermLoanThreeMember        
Investments, fair value 4,950   4,950  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsTechnologyHiveMQIncSoftwareTermLoanTwoMember        
Investments, fair value 4,950   4,950  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsTechnologyKodiakRoboticsIncSoftwareTermLoanOneMember        
Investments, fair value 14,649   14,649  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsTechnologyKodiakRoboticsIncSoftwareTermLoanThreeMember        
Investments, fair value 7,325   7,325  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsTechnologyKodiakRoboticsIncSoftwareTermLoanTwoMember        
Investments, fair value 7,325   7,325  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsTechnologyKodiakRoboticsSoftwareTermLoanOneMember        
Investments, fair value     14,599  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsTechnologyKodiakRoboticsSoftwareTermLoanThreeMember        
Investments, fair value     7,300  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsTechnologyKodiakRoboticsSoftwareTermLoanTwoMember        
Investments, fair value     7,300  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsTechnologyLyricalFoodsIncConsumerrelatedTechnologiesTermLoanOneMember        
Investments, fair value     2,400  
Investments, fair value 1,549   1,549  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsTechnologyLyricalFoodsIncConsumerrelatedTechnologiesTermLoanTwoMember        
Investments, fair value     2,320  
Investments, fair value 1,497   1,497  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsTechnologyMasteryPrepLLCSoftwareTermLoanOneMember        
Investments, fair value     7,383  
Investments, fair value 7,416   7,416  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsTechnologyMasteryPrepLLCSoftwareTermLoanTwoMember        
Investments, fair value     7,433  
Investments, fair value 7,441   7,441  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsTechnologyMember        
Investments, fair value     201,718  
Investments, fair value 244,460   244,460  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsTechnologyMirantisIncSoftwareTermLoanFourMember        
Investments, fair value     4,541  
Investments, fair value 3,720   3,720  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsTechnologyMirantisIncSoftwareTermLoanOneMember        
Investments, fair value     4,541  
Investments, fair value 3,720   3,720  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsTechnologyMirantisIncSoftwareTermLoanThreeMember        
Investments, fair value     4,541  
Investments, fair value 3,720   3,720  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsTechnologyMirantisIncSoftwareTermLoanTwoMember        
Investments, fair value     4,541  
Investments, fair value 3,720   3,720  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsTechnologySambaTVIncSoftwareTermLoanFourMember        
Investments, fair value     2,467  
Investments, fair value 2,483   2,483  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsTechnologySambaTVIncSoftwareTermLoanOneMember        
Investments, fair value     9,792  
Investments, fair value 9,855   9,855  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsTechnologySambaTVIncSoftwareTermLoanThreeMember        
Investments, fair value     4,934  
Investments, fair value 4,965   4,965  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsTechnologySambaTVIncSoftwareTermLoanTwoMember        
Investments, fair value     7,400  
Investments, fair value 7,448   7,448  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsTechnologyStellarCyberIncSoftwareTermLoanOneMember        
Investments, fair value 4,840   4,840  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsTechnologyStellarCyberIncSoftwareTermLoanThreeMember        
Investments, fair value 4,940   4,940  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsTechnologyStellarCyberIncSoftwareTermLoanTwoMember        
Investments, fair value 4,940   4,940  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsTechnologySupplyNetworkVisibilityHoldingsLLCSoftwareTermLoanFiveMember        
Investments, fair value     4,671  
Investments, fair value 4,563   4,563  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsTechnologySupplyNetworkVisibilityHoldingsLLCSoftwareTermLoanFourMember        
Investments, fair value     1,403  
Investments, fair value 1,313   1,313  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsTechnologySupplyNetworkVisibilityHoldingsLLCSoftwareTermLoanOneMember        
Investments, fair value     2,280  
Investments, fair value 2,188   2,188  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsTechnologySupplyNetworkVisibilityHoldingsLLCSoftwareTermLoanThreeMember        
Investments, fair value     2,338  
Investments, fair value 2,188   2,188  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsTechnologySupplyNetworkVisibilityHoldingsLLCSoftwareTermLoanTwoMember        
Investments, fair value     3,273  
Investments, fair value 3,064   3,064  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsTechnologyUrsaSpaceSystemsIncSoftwareTermLoanFourMember        
Investments, fair value     2,445  
Investments, fair value 2,158   2,158  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsTechnologyUrsaSpaceSystemsIncSoftwareTermLoanOneMember        
Investments, fair value     2,460  
Investments, fair value 2,169   2,169  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsTechnologyUrsaSpaceSystemsIncSoftwareTermLoanThreeMember        
Investments, fair value     2,445  
Investments, fair value 2,158   2,158  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsTechnologyUrsaSpaceSystemsIncSoftwareTermLoanTwoMember        
Investments, fair value     2,460  
Investments, fair value 2,169   2,169  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsTechnologyVikenDetectionCorporationSoftwareTermLoanOneMember        
Investments, fair value     2,814  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsTechnologyVikenDetectionCorporationSoftwareTermLoanThreeMember        
Investments, fair value     1,407  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsTechnologyVikenDetectionCorporationSoftwareTermLoanTwoMember        
Investments, fair value     1,407  
Investment, Identifier [Axis]: NonaffiliateDebtInvestmentsTechnologyVoltBidcoIncSoftwareTermLoanOneMember        
Investments, fair value 4,000   4,000  
Investment, Identifier [Axis]: NonaffiliateEquityAxiomSpaceHoldingsIncCommunicationPreferredStockOneMember        
Investments, fair value 306   306  
Investment, Identifier [Axis]: NonaffiliateEquityAxiomSpaceHoldingsIncCommunicationsPreferredStockOneMember        
Investments, fair value     306  
Investment, Identifier [Axis]: NonaffiliateEquityBioVaxysTechnologyCorpBiotechnologyCommonStockOneMember        
Investments, fair value     11  
Investments, fair value 8   8  
Investment, Identifier [Axis]: NonaffiliateEquityCadrenalTherapeuticsIncBiotechnologyCommonStockOneMember        
Investments, fair value     271  
Investments, fair value 134   134  
Investment, Identifier [Axis]: NonaffiliateEquityCastleCreekBiosciencesIncBiotechnologyCommonStockOneMember        
Investments, fair value     217  
Investments, fair value 217   217  
Investment, Identifier [Axis]: NonaffiliateEquityCognoaIncMedicalDeviceCommonStockOneMember        
Investments, fair value     975  
Investments, fair value 975   975  
Investment, Identifier [Axis]: NonaffiliateEquityCognoaIncMedicalDevicePreferredStockOneMember        
Investments, fair value     500  
Investments, fair value 500   500  
Investment, Identifier [Axis]: NonaffiliateEquityDecisyonIncOtherSoftwarePreferredStockOneMember        
Investments, fair value     0  
Investment, Identifier [Axis]: NonaffiliateEquityDecisyonIncSoftwarePreferredStockOneMember        
Investments, fair value 0   0  
Investment, Identifier [Axis]: NonaffiliateEquityEmalexBiosciencesIncBiotechnologyPreferredStockOneMember        
Investments, fair value     656  
Investments, fair value 457   457  
Investment, Identifier [Axis]: NonaffiliateEquityKodiakRoboticsIncOtherSoftwareCommonStockOneMember        
Investments, fair value     3,700  
Investment, Identifier [Axis]: NonaffiliateEquityKodiakRoboticsIncSoftwareCommonStockOneMember        
Investments, fair value 1,721   1,721  
Investment, Identifier [Axis]: NonaffiliateEquityMember        
Investments, fair value     6,716  
Investments, fair value 3,946   3,946  
Investment, Identifier [Axis]: NonaffiliateEquityPebblePostIncCommunicationPreferredStockOneMember        
Investments, fair value 73   73  
Investment, Identifier [Axis]: NonaffiliateEquityPebblePostIncCommunicationsPreferredStockOneMember        
Investments, fair value     73  
Investment, Identifier [Axis]: NonaffiliateEquitySnagAJobcomIncConsumerrelatedTechnologiesCommonStockOneMember        
Investments, fair value     0  
Investments, fair value 0   0  
Investment, Identifier [Axis]: NonaffiliateEquityTigoEnergyIncOtherSustainabilityCommonStockOneMember        
Investments, fair value     7  
Investments, fair value 12   12  
Investment, Identifier [Axis]: NonaffiliateOtherInvestmentsLifeScienceAerobiotixLLCMedicalDeviceRoyaltyAgreementOneMember        
Investments, fair value     1,574  
Investments, fair value 1,743   1,743  
Investment, Identifier [Axis]: NonaffiliateOtherInvestmentsLifeScienceBioVaxysTechnologyCorpBiotechnologyRoyaltyAgreementOneMember        
Investments, fair value     0  
Investments, fair value 0   0  
Investment, Identifier [Axis]: NonaffiliateOtherInvestmentsLifeScienceLumitheraIncMedicalDeviceRoyaltyAgreementOneMember        
Investments, fair value     384  
Investments, fair value 351   351  
Investment, Identifier [Axis]: NonaffiliateOtherInvestmentsLifeScienceMember        
Investments, fair value     1,958  
Investments, fair value 2,551   2,551  
Investment, Identifier [Axis]: NonaffiliateOtherInvestmentsLifeScienceRobinHealthcareIncMedicalDeviceRoyaltyAgreementOneMember        
Investments, fair value     0  
Investment, Identifier [Axis]: NonaffiliateOtherInvestmentsMember        
Investments, fair value     1,958  
Investments, fair value 2,551   2,551  
Investment, Identifier [Axis]: NonaffiliateOtherInvestmentsTechnologyBetterPlaceForestsCoConsumerrelatedTechnologiesOtherInvestmentOneMember        
Investments, fair value     0  
Investment, Identifier [Axis]: NonaffiliateOtherInvestmentsTechnologyBetterPlaceForestsCoConsumerrelatedTechnologyOtherInvestmentOneMember        
Investments, fair value 0   0  
Investment, Identifier [Axis]: NonaffiliateOtherInvestmentsTechnologyMember        
Investments, fair value     0  
Investments, fair value 0   0  
Investment, Identifier [Axis]: NonaffiliatePortfolioInvestmentAssetsMember        
Investments, fair value     584,100  
Investments, fair value 651,288   651,288  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsHealthcareBrightInsightIncSoftwarePreferredStockWarrantOneMember        
Investments, fair value 0   0  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsHealthcareBrightInsightIncSoftwarePreferredStockWarrantsOneMember        
Investments, fair value     0  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsHealthcareElligoHealthResearchIncSoftwarePreferredStockWarrantOneMember        
Investments, fair value 0   0  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsHealthcareElligoHealthResearchIncSoftwarePreferredStockWarrantsOneMember        
Investments, fair value     0  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsHealthcareGTMedicalTechnologiesIncOtherHealthcarePreferredStockWarrantOneMember        
Investments, fair value 201   201  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsHealthcareGTMedicalTechnologiesIncOtherHealthcarePreferredStockWarrantsOneMember        
Investments, fair value     39  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsHealthcareInformationAndServicesMember        
Investments, fair value     137  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsHealthcareInformationandServicesMember        
Investments, fair value 303   303  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsHealthcareSafelyYouIncSoftwarePreferredStockWarrantOneMember        
Investments, fair value 102   102  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsHealthcareSafelyYouIncSoftwarePreferredStockWarrantsOneMember        
Investments, fair value     98  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsLifeScienceAerinMedicalIncMedicalDevicePreferredStockWarrantOneMember        
Investments, fair value 1,337   1,337  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsLifeScienceAerinMedicalIncMedicalDevicePreferredStockWarrantsOneMember        
Investments, fair value     1,333  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsLifeScienceAvaloTherapeuticIncBiotechnologyCommonStockWarrantOneMember        
Investments, fair value 0   0  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsLifeScienceAvaloTherapeuticsIncBiotechnologyCommonStockWarrantsOneMember        
Investments, fair value     0  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsLifeScienceAviveSolutionsIncMedicalDevicePreferredStockWarrantOneMember        
Investments, fair value 88   88  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsLifeScienceBioVaxysTechnologyCorpBiotechnologyCommonStockWarrantsOneMember        
Investments, fair value     0  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsLifeScienceBiovaxysTechnologyCorpBiotechnologyCommonStockWarrantOneMember        
Investments, fair value 0   0  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsLifeScienceCSAMedicalIncMedicalDevicePreferredStockWarrantOneMember        
Investments, fair value 474   474  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsLifeScienceCSAMedicalIncMedicalDevicePreferredStockWarrantsOneMember        
Investments, fair value     462  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsLifeScienceCVRxIncMedicalDeviceCommonStockWarrantOneMember        
Investments, fair value 4   4  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsLifeScienceCVRxIncMedicalDeviceCommonStockWarrantsOneMember        
Investments, fair value     20  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsLifeScienceCanaryMedicalIncMedicalDevicePreferredStockWarrantOneMember        
Investments, fair value 0   0  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsLifeScienceCanaryMedicalIncMedicalDevicePreferredStockWarrantsOneMember        
Investments, fair value     0  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsLifeScienceCastleCreekBiosciencesBiotechnologyPreferredStockWarrantOneMember        
Investments, fair value 180   180  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsLifeScienceCastleCreekBiosciencesIncBiotechnologyPreferredStockWarrantsOneMember        
Investments, fair value     274  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsLifeScienceCeribellIncMedicalDeviceCommonStockWarrantOneMember        
Investments, fair value 997   997  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsLifeScienceCeribellIncMedicalDeviceCommonStockWarrantsOneMember        
Investments, fair value     1,205  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsLifeScienceCognoaIncMedicalDeviceCommonStockWarrantOneMember        
Investments, fair value 4   4  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsLifeScienceCognoaIncMedicalDeviceCommonStockWarrantsOneMember        
Investments, fair value     2  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsLifeScienceCognoaIncMedicalDevicePreferredStockWarrantOneMember        
Investments, fair value 2   2  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsLifeScienceCognoaIncMedicalDevicePreferredStockWarrantsOneMember        
Investments, fair value     3  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsLifeScienceConventusOrthopaedicsIncMedicalDevicePreferredStockWarrantOneMember        
Investments, fair value 0   0  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsLifeScienceConventusOrthopaedicsIncMedicalDevicePreferredStockWarrantsOneMember        
Investments, fair value     0  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsLifeScienceEmalexBiosciencesIncBiotechnologyPreferredStockWarrantsOneMember        
Investments, fair value     447  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsLifeScienceHyperfineIncMedicalDeviceCommonStockWarrantOneMember        
Investments, fair value 211   211  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsLifeScienceImunonIncBiotechnologyCommonStockWarrantOneMember        
Investments, fair value 0   0  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsLifeScienceImunonIncBiotechnologyCommonStockWarrantsOneMember        
Investments, fair value     0  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsLifeScienceInfobionicIncMedicalDevicePreferredStockWarrantOneMember        
Investments, fair value 1,701   1,701  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsLifeScienceInfobionicIncMedicalDevicePreferredStockWarrantsOneMember        
Investments, fair value     705  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsLifeScienceKSQTherapeuticsIncBiotechnologyPreferredStockWarrantOneMember        
Investments, fair value 74   74  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsLifeScienceKSQTherapeuticsIncBiotechnologyPreferredStockWarrantsOneMember        
Investments, fair value     13  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsLifeScienceMagnoliaMedicalTechnologiesIncMedicalDevicePreferredStockWarrantsOneMember        
Investments, fair value     321  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsLifeScienceMagnoliaMedicalTechnologiesIncMedicalDevicesPreferredStockWarrantOneMember        
Investments, fair value 248   248  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsLifeScienceMeditrinaIncMedicalDevicePreferredStockWarrantsOneMember        
Investments, fair value     95  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsLifeScienceMeditrinaIncMedicalDevicesPreferredStockWarrantOneMember        
Investments, fair value 84   84  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsLifeScienceMember        
Investments, fair value     6,964  
Investments, fair value 7,596   7,596  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsLifeScienceMobiaMedicalIncfkaMicrotransponderIncMedicalDevicePreferredStockWarrantsOneMember        
Investments, fair value     47  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsLifeScienceMobiaMedicalIncfkaMicrotransponderIncMedicalDevicesPreferredStockWarrantOneMember        
Investments, fair value 171   171  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsLifeScienceMustangBioIncBiotechnologyCommonStockWarrantOneMember        
Investments, fair value 0   0  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsLifeScienceMustangBioIncBiotechnologyCommonStockWarrantsOneMember        
Investments, fair value     0  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsLifeScienceNativeMicrobialsIncBiotechnologyPreferredStockWarrantOneMember        
Investments, fair value 5   5  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsLifeScienceNativeMicrobialsIncBiotechnologyPreferredStockWarrantsOneMember        
Investments, fair value     4  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsLifeScienceOnkosSurgicalIncMedicalDevicePreferredStockWarrantsOneMember        
Investments, fair value     200  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsLifeScienceOnkosSurgicalIncMedicalDevicesPreferredStockWarrantOneMember        
Investments, fair value 206   206  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsLifeScienceOssioIncMedicalDevicesPreferredStockWarrantOneMember        
Investments, fair value 119   119  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsLifeSciencePDSBiotechnologyCorporationBiotechnologyCommonStockWarrantOneMember        
Investments, fair value 0   0  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsLifeSciencePDSBiotechnologyCorporationBiotechnologyCommonStockWarrantsOneMember        
Investments, fair value     0  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsLifeSciencePelthosTherapeuticsIncBiotechnologyCommonStockWarrantOneMember        
Investments, fair value 507   507  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsLifeScienceProviviIncBiotechnologyCommonStockWarrantOneMember        
Investments, fair value 0   0  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsLifeScienceProviviIncBiotechnologyCommonStockWarrantsOneMember        
Investments, fair value     0  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsLifeScienceProviviIncBiotechnologyPreferredStockWarrantOneMember        
Investments, fair value 0   0  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsLifeScienceProviviIncBiotechnologyPreferredStockWarrantsOneMember        
Investments, fair value     0  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsLifeScienceScientiaVascularIncMedicalDeviceCommonStockWarrantsOneMember        
Investments, fair value     235  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsLifeScienceScientiaVascularIncMedicalDevicePreferredStockWarrantsOneMember        
Investments, fair value     481  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsLifeScienceSonexHealthIncMedicalDevicePreferredStockWarrantsOneMember        
Investments, fair value     199  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsLifeScienceSonexHealthIncMedicalDevicesPreferredStockWarrantOneMember        
Investments, fair value 337   337  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsLifeScienceSpineologyIncMedicalDeviceCommonStockWarrantsOneMember        
Investments, fair value     41  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsLifeScienceSpineologyIncMedicalDevicePreferredStockWarrantsOneMember        
Investments, fair value     69  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsLifeScienceSpineologyIncMedicalDevicesCommonStockWarrantOneMember        
Investments, fair value 0   0  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsLifeScienceSpineologyIncMedicalDevicesPreferredStockWarrantOneMember        
Investments, fair value 23   23  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsLifeScienceStealthBiotherapeuticsIncBiotechnologyCommonStockWarrantOneMember        
Investments, fair value 7   7  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsLifeScienceStealthBiotherapeuticsIncBiotechnologyCommonStockWarrantsOneMember        
Investments, fair value     6  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsLifeScienceTallacTherapeuticsIncMedicalDeviceRoyaltyAgreementOneMember        
Investments, fair value 0   0  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsLifeScienceVEROBiotechLLCMedicalDevicePreferredStockWarrantsOneMember        
Investments, fair value     111  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsLifeScienceVEROBiotechLLCMedicalDevicesPreferredStockWarrantOneMember        
Investments, fair value 116   116  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsLifeScienceXerisPharmaceuticalsIncBiotechnologyCommonStockWarrantOneMember        
Investments, fair value 701   701  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsLifeScienceXerisPharmaceuticalsIncBiotechnologyCommonStockWarrantsOneMember        
Investments, fair value     691  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsLifeScienceZetrOzIncMedicalDeviceRoyaltyAgreementOneMember        
Investments, fair value 0   0  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsMember        
Investments, fair value     16,648  
Investments, fair value 16,703   16,703  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsSustainabilityLiquiGlideIncOtherSustainabilityPreferredStockWarrantOneMember        
Investments, fair value 43   43  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsSustainabilityLiquiGlideIncOtherSustainabilityPreferredStockWarrantsOneMember        
Investments, fair value     47  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsSustainabilityMember        
Investments, fair value     143  
Investments, fair value 75   75  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsSustainabilityNewAerofarmsIncOtherSustainabilityPreferredStockWarrantsOneMember        
Investments, fair value     30  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsSustainabilityPivotBioIncEnergyEfficiencyPreferredStockWarrantOneMember        
Investments, fair value 3   3  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsSustainabilityPivotBioIncEnergyEfficiencyPreferredStockWarrantsOneMember        
Investments, fair value     2  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsSustainabilitySparkChargeIncAlternativeEnergyPreferredStockWarrantsOneMember        
Investments, fair value     36  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsSustainabilityTemperpackTechnologiesIncOtherSustainabilityPreferredStockWarrantOneMember        
Investments, fair value 29   29  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsSustainabilityTemperpackTechnologiesIncOtherSustainabilityPreferredStockWarrantsOneMember        
Investments, fair value     28  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologyAlulaHoldingsIncConsumerrelatedTechnologiesPreferredStockWarrantOneMember        
Investments, fair value 0   0  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologyAlulaHoldingsIncConsumerrelatedTechnologiesPreferredStockWarrantsOneMember        
Investments, fair value     6  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologyApkudoIncSoftwarePreferredStockWarrantOneMember        
Investments, fair value 64   64  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologyApkudoIncSoftwarePreferredStockWarrantsOneMember        
Investments, fair value     118  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologyAxiomSpaceHoldingsIncCommunicationsCommonStockWarrantOneMember        
Investments, fair value 39   39  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologyAxiomSpaceHoldingsIncCommunicationsCommonStockWarrantsOneMember        
Investments, fair value     33  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologyBriteCoreHoldingsIncSoftwarePreferredStockWarrantOneMember        
Investments, fair value 509   509  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologyBriteCoreHoldingsIncSoftwarePreferredStockWarrantsOneMember        
Investments, fair value     229  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologyCAMPNYCIncConsumerrelatedTechnologiesPreferredStockWarrantOneMember        
Investments, fair value 0   0  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologyCAMPNYCIncConsumerrelatedTechnologiesPreferredStockWarrantsOneMember        
Investments, fair value     76  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologyCPGBeyondIncDataStoragePreferredStockWarrantOneMember        
Investments, fair value 22   22  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologyCPGBeyondIncDataStoragePreferredStockWarrantsOneMember        
Investments, fair value     57  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologyClaraFoodsCoConsumerrelatedTechnologiesPreferredStockWarrantOneMember        
Investments, fair value 43   43  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologyClaraFoodsCoConsumerrelatedTechnologiesPreferredStockWarrantsOneMember        
Investments, fair value     41  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologyCraftyHoldingsIncSoftwareCommonStockWarrantOneMember        
Investments, fair value 188   188  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologyCraftyHoldingsIncSoftwareCommonStockWarrantsOneMember        
Investments, fair value     178  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologyDivergentTechnologiesIncConsumerrelatedTechnologiesCommonStockWarrantOneMember        
Investments, fair value 61   61  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologyDivergentTechnologiesIncConsumerrelatedTechnologiesCommonStockWarrantsOneMember        
Investments, fair value     59  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologyDivergentTechnologiesIncConsumerrelatedTechnologiesPreferredStockWarrantOneMember        
Investments, fair value 770   770  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologyDivergentTechnologiesIncConsumerrelatedTechnologiesPreferredStockWarrantsOneMember        
Investments, fair value     771  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologyDropoffIncSoftwareCommonStockWarrantOneMember        
Investments, fair value 0   0  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologyDropoffIncSoftwareCommonStockWarrantsOneMember        
Investments, fair value     0  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologyEverstreamHoldingsLLCSoftwarePreferredStockWarrantOneMember        
Investments, fair value 0   0  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologyEverstreamHoldingsLLCSoftwarePreferredStockWarrantsOneMember        
Investments, fair value     0  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologyGlobalWorldwideLLCInternetandMediaPreferredStockWarrantOneMember        
Investments, fair value 0   0  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologyGlobalWorldwideLLCInternetandMediaPreferredStockWarrantsOneMember        
Investments, fair value     0  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologyHappyCoIncSoftwarePreferredStockWarrantOneMember        
Investments, fair value 45   45  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologyHappyCoIncSoftwarePreferredStockWarrantsOneMember        
Investments, fair value     20  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologyHavenlyIncConsumerrelatedTechnologiesCommonStockWarrantOneMember        
Investments, fair value 3,239   3,239  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologyHavenlyIncConsumerrelatedTechnologiesCommonStockWarrantsOneMember        
Investments, fair value     3,510  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologyIntelepeerHoldingsIncCommunicationsPreferredStockWarrantOneMember        
Investments, fair value 1,269   1,269  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologyIntelepeerHoldingsIncCommunicationsPreferredStockWarrantsOneMember        
Investments, fair value     2,730  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologyLemongrassHoldingsIncSoftwarePreferredStockWarrantOneMember        
Investments, fair value 76   76  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologyLemongrassHoldingsIncSoftwarePreferredStockWarrantsOneMember        
Investments, fair value     96  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologyLiqidIncNetworkingCommonStockWarrantOneMember        
Investments, fair value 0   0  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologyLiqidIncNetworkingCommonStockWarrantsOneMember        
Investments, fair value     0  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologyMember        
Investments, fair value     9,404  
Investments, fair value 8,729   8,729  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologyMirantisIncSoftwareCommonStockWarrantOneMember        
Investments, fair value 1,419   1,419  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologyMirantisIncSoftwareCommonStockWarrantsOneMember        
Investments, fair value     420  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologyMyForestFoodsCoConsumerrelatedTechnologiesPreferredStockWarrantOneMember        
Investments, fair value 49   49  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologyMyForestFoodsCoConsumerrelatedTechnologiesPreferredStockWarrantsOneMember        
Investments, fair value     47  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologyNoodlePartnersIncSoftwarePreferredStockWarrantOneMember        
Investments, fair value 0   0  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologyNoodlePartnersIncSoftwarePreferredStockWarrantsOneMember        
Investments, fair value     0  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologyOneNetworksIncSoftwarePreferredStockWarrantOneMember        
Investments, fair value 3   3  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologyOneNetworksIncSoftwarePreferredStockWarrantsOneMember        
Investments, fair value     2  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologyPrimaryKidsIncConsumerrelatedTechnologiesPreferredStockWarrantOneMember        
Investments, fair value 21   21  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologyPrimaryKidsIncConsumerrelatedTechnologiesPreferredStockWarrantsOneMember        
Investments, fair value     73  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologyQuipNYCIncConsumerrelatedTechnologiesPreferredStockWarrantOneMember        
Investments, fair value 0   0  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologyQuipNYCIncConsumerrelatedTechnologiesPreferredStockWarrantsOneMember        
Investments, fair value     0  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologyRevinateHoldingsIncSoftwarePreferredStockWarrantOneMember        
Investments, fair value 89   89  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologyRevinateHoldingsIncSoftwarePreferredStockWarrantsOneMember        
Investments, fair value     86  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologyRocketLawyerIncorporatedInternetandMediaPreferredStockWarrantOneMember        
Investments, fair value 78   78  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologyRocketLawyerIncorporatedInternetandMediaPreferredStockWarrantsOneMember        
Investments, fair value     151  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologySIGNiXIncSoftwarePreferredStockWarrantOneMember        
Investments, fair value 0   0  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologySIGNiXIncSoftwarePreferredStockWarrantsOneMember        
Investments, fair value     0  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologySilkIncDataStoragePreferredStockWarrantOneMember        
Investments, fair value 175   175  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologySilkIncDataStoragePreferredStockWarrantsOneMember        
Investments, fair value     173  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologySkillshareIncInternetandMediaPreferredStockWarrantOneMember        
Investments, fair value 0   0  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologySkillshareIncInternetandMediaPreferredStockWarrantsOneMember        
Investments, fair value     0  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologySlingshotAerospaceIncSoftwarePreferredStockWarrantOneMember        
Investments, fair value 47   47  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologySlingshotAerospaceIncSoftwarePreferredStockWarrantsOneMember        
Investments, fair value     45  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologyStellarCyberIncSoftwareCommonStockWarrantOneMember        
Investments, fair value 40   40  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologySupplyNetworkVisibilityHoldingsLLCSoftwarePreferredStockWarrantOneMember        
Investments, fair value 0   0  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologySupplyNetworkVisibilityHoldingsLLCSoftwarePreferredStockWarrantsOneMember        
Investments, fair value     0  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologyTopiaMobilityIncSoftwareCommonStockWarrantOneMember        
Investments, fair value 0   0  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologyTopiaMobilityIncSoftwareCommonStockWarrantsOneMember        
Investments, fair value     0  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologyUpdaterIncConsumerrelatedTechnologiesPreferredStockWarrantOneMember        
Investments, fair value 0   0  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologyUpdaterIncConsumerrelatedTechnologiesPreferredStockWarrantsOneMember        
Investments, fair value     0  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologyUrsaSpaceSystemsIncSoftwarePreferredStockWarrantOneMember        
Investments, fair value 146   146  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologyUrsaSpaceSystemsIncSoftwarePreferredStockWarrantsOneMember        
Investments, fair value     169  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologyVikenDetectionCorporationSoftwarePreferredStockWarrantOneMember        
Investments, fair value 337   337  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologyVikenDetectionCorporationSoftwarePreferredStockWarrantsOneMember        
Investments, fair value     314  
Investment, Identifier [Axis]: NonaffiliateWarrantInvestmentsTechnologyxAdIncSoftwarePreferredStockWarrantsOneMember        
Investments, fair value     0  
Investment, Identifier [Axis]: NoncontrolledAffiliateAuleaMedicalIncMember        
Investments, fair value 0 0 0 0
Purchases 0 0 0 0
Reductions 0 0 0 0
Interest Income, Operating, Paid in Kind 0 0 0 0
Transfers in/(out) at fair value 0 0 0 0
Discount accretion 0 0 0 0
Net unrealized appreciation (depreciation) on non-affiliate investments 0 0 0 0
Investments, fair value 0 0 0 0
Interest income 0 0 0 0
Investment, Identifier [Axis]: NoncontrolledAffiliateDebtInvestmentsHoundLabsIILLCDiagnosticsTermLoanOneMember        
Investments, fair value     6,605  
Investments, fair value 6,749   6,749  
Investment, Identifier [Axis]: NoncontrolledAffiliateDebtInvestmentsMember        
Investments, fair value     37,247  
Investments, fair value 19,911   19,911  
Investment, Identifier [Axis]: NoncontrolledAffiliateDebtInvestmentsNexiiIncOtherSustainabilityTermLoanOneMember        
Investments, fair value     0  
Investments, fair value 0   0  
Investment, Identifier [Axis]: NoncontrolledAffiliateDebtInvestmentsNexiiIncOtherSustainabilityTermLoanTwoMember        
Investments, fair value     0  
Investments, fair value 0   0  
Investment, Identifier [Axis]: NoncontrolledAffiliateDebtInvestmentsNextcarHoldingCompanyIncConsumerRelatedTechnologiesTermLoanOneMember        
Investments, fair value 936   936  
Investment, Identifier [Axis]: NoncontrolledAffiliateDebtInvestmentsNextcarHoldingCompanyIncConsumerrelatedTechnologiesTermLoanOneMember        
Investments, fair value     1,079  
Investment, Identifier [Axis]: NoncontrolledAffiliateDebtInvestmentsShengrowIncOtherSustainabilityRevolverOneMember        
Investments, fair value     5,000  
Investments, fair value 5,000   5,000  
Investment, Identifier [Axis]: NoncontrolledAffiliateDebtInvestmentsShengrowIncOtherSustainabilityRevolverTwoMember        
Investments, fair value     3,809  
Investments, fair value 5,000   5,000  
Investment, Identifier [Axis]: NoncontrolledAffiliateDebtInvestmentsShengrowIncOtherSustainabilityTermLoanFiveMember        
Investments, fair value     1,723  
Investments, fair value 185   185  
Investment, Identifier [Axis]: NoncontrolledAffiliateDebtInvestmentsShengrowIncOtherSustainabilityTermLoanFourMember        
Investments, fair value     3,447  
Investments, fair value 370   370  
Investment, Identifier [Axis]: NoncontrolledAffiliateDebtInvestmentsShengrowIncOtherSustainabilityTermLoanOneMember        
Investments, fair value     5,246  
Investments, fair value 561   561  
Investment, Identifier [Axis]: NoncontrolledAffiliateDebtInvestmentsShengrowIncOtherSustainabilityTermLoanSevenMember        
Investments, fair value     1,722  
Investments, fair value 185   185  
Investment, Identifier [Axis]: NoncontrolledAffiliateDebtInvestmentsShengrowIncOtherSustainabilityTermLoanSixMember        
Investments, fair value     3,445  
Investments, fair value 370   370  
Investment, Identifier [Axis]: NoncontrolledAffiliateDebtInvestmentsShengrowIncOtherSustainabilityTermLoanThreeMember        
Investments, fair value     1,724  
Investments, fair value 185   185  
Investment, Identifier [Axis]: NoncontrolledAffiliateDebtInvestmentsShengrowIncOtherSustainabilityTermLoanTwoMember        
Investments, fair value     3,447  
Investments, fair value 370   370  
Investment, Identifier [Axis]: NoncontrolledAffiliateEquityAuleaMedicalIncMedicalDeviceCommonStockOneMember        
Investments, fair value     0  
Investments, fair value 0   0  
Investment, Identifier [Axis]: NoncontrolledAffiliateEquityEveloHoldingsIncBiotechnologyCommonStockOneMember        
Investments, fair value     0  
Investments, fair value 0   0  
Investment, Identifier [Axis]: NoncontrolledAffiliateEquityHoundLabsIILLCDiagnosticsPreferredStockOneMember        
Investments, fair value     4,764  
Investments, fair value 3,811   3,811  
Investment, Identifier [Axis]: NoncontrolledAffiliateEquityMember        
Investments, fair value     24,411  
Investments, fair value 3,811   3,811  
Investment, Identifier [Axis]: NoncontrolledAffiliateEquityNexiiIncOtherSustainabilityPreferredStockOneMember        
Investments, fair value     0  
Investments, fair value 0   0  
Investment, Identifier [Axis]: NoncontrolledAffiliateEquityNextCarHoldingCompanyIncConsumerrelatedTechnologiesPreferredStockOneMember        
Investments, fair value 0   0  
Investment, Identifier [Axis]: NoncontrolledAffiliateEquityNextCarHoldingCompanyIncConsumerrelatedTechnologyPreferredStockOneMember        
Investments, fair value     0  
Investment, Identifier [Axis]: NoncontrolledAffiliateEquityShengrowIncakaSoliOrganicIncOtherSustainabilityCommonStockOneMember        
Investments, fair value     1,292  
Investments, fair value 0   0  
Investment, Identifier [Axis]: NoncontrolledAffiliateEquityShengrowIncakaSoliOrganicIncOtherSustainabilityPreferredStockOneMember        
Investments, fair value     18,355  
Investments, fair value 0   0  
Investment, Identifier [Axis]: NoncontrolledAffiliateEveloBiosciencesIncMember        
Investments, fair value 1,486 8,307 1,486 8,307
Purchases 0 0 0 2
Reductions 0 0 0 0
Interest Income, Operating, Paid in Kind 0 0 0 0
Transfers in/(out) at fair value 0 0 0 0
Discount accretion 0 0 0 0
Net unrealized appreciation (depreciation) on non-affiliate investments   (1,600)   (1,602)
Investments, fair value 1,486 6,707 1,486 6,707
Interest income 0 0 0 0
Net realized loss on investments 0 0 0 0
Net realized gain (loss) 0 0 0 0
Investment, Identifier [Axis]: NoncontrolledAffiliateHoundLabsIILLCMember        
Investments, fair value 11,573   11,369  
Purchases 0   0  
Reductions 0   0  
Interest Income, Operating, Paid in Kind 228   447  
Transfers in/(out) at fair value 0   0  
Discount accretion 0   0  
Net unrealized appreciation (depreciation) on non-affiliate investments (1,241)   (1,256)  
Investments, fair value 10,560   10,560  
Interest income 228   447  
Net realized loss on investments 0   0  
Net realized gain (loss) 0   0  
Investment, Identifier [Axis]: NoncontrolledAffiliateMember        
Investments, fair value 64,202 8,307 63,144 8,307
Purchases 3 0 7 2
Reductions (151) 0 (394) 0
Interest Income, Operating, Paid in Kind 440 0 1,281 0
Transfers in/(out) at fair value 0 0 0 0
Discount accretion 109 0 415 0
Net unrealized appreciation (depreciation) on non-affiliate investments (39,395) (1,600) (39,245) (1,602)
Investments, fair value 25,208 6,707 25,208 6,707
Interest income 311 0 1,884 0
Net realized loss on investments 0 0 0 0
Net realized gain (loss) 0 $ 0 0 $ 0
Investment, Identifier [Axis]: NoncontrolledAffiliateNexiiIncMember        
Investments, fair value 0   0  
Purchases 3   7  
Reductions 0   0  
Interest Income, Operating, Paid in Kind 0   0  
Transfers in/(out) at fair value 0   0  
Discount accretion 0   0  
Net unrealized appreciation (depreciation) on non-affiliate investments (3)   (7)  
Investments, fair value 0   0  
Interest income 28   55  
Net realized loss on investments 0   0  
Net realized gain (loss) 0   0  
Investment, Identifier [Axis]: NoncontrolledAffiliateNextCarHoldingCompanyIncMember        
Investments, fair value 1,005   1,079  
Purchases 0   0  
Reductions (151)   (394)  
Interest Income, Operating, Paid in Kind 0   0  
Transfers in/(out) at fair value 0   0  
Discount accretion 0   0  
Net unrealized appreciation (depreciation) on non-affiliate investments 82   251  
Investments, fair value 936   936  
Interest income 34   89  
Net realized loss on investments 0   0  
Net realized gain (loss) 0   0  
Investment, Identifier [Axis]: NoncontrolledAffiliateOtherInvestmentsEveloHoldingsIncBiotechnologyOtherInvestmentOneMember        
Investments, fair value     1,486  
Investments, fair value 1,486   1,486  
Investment, Identifier [Axis]: NoncontrolledAffiliateOtherInvestmentsMember        
Investments, fair value     1,486  
Investments, fair value 1,486   1,486  
Investment, Identifier [Axis]: NoncontrolledAffiliatePortfolioInvestmentAssetsMember        
Investments, fair value     63,144  
Investments, fair value 25,208   25,208  
Investment, Identifier [Axis]: NoncontrolledAffiliateShengrowIncMember        
Investments, fair value 50,138   49,210  
Purchases 0   0  
Reductions 0   0  
Interest Income, Operating, Paid in Kind 212   834  
Transfers in/(out) at fair value 0   0  
Discount accretion 109   415  
Net unrealized appreciation (depreciation) on non-affiliate investments (38,233)   (38,233)  
Investments, fair value 12,226   12,226  
Interest income 21   1,293  
Net realized loss on investments 0   0  
Net realized gain (loss) 0   0  
Investment, Identifier [Axis]: NoncontrolledAffiliateWarrantInvestmentsEveloHoldingsIncBiotechnologyCommonStockWarrantOneMember        
Investments, fair value     0  
Investment, Identifier [Axis]: NoncontrolledAffiliateWarrantInvestmentsMember        
Investments, fair value     0  
Investment, Identifier [Axis]: NoncontrolledAffiliateWarrantsEveloHoldingsIncBiotechnologyCommonStockWarrantsOneMember        
Investments, fair value 0   0  
Investment, Identifier [Axis]: NoncontrolledAffiliateWarrantsMember        
Investments, fair value 0   0  
Investment, Identifier [Axis]: PortfolioInvestmentAssetsMember        
Investments, fair value     647,244  
Investments, fair value 676,711   676,711  
Investment, Identifier [Axis]: ShortTermRestrictedInvestmentsMember        
Investments, fair value     2,463  
Investment, Identifier [Axis]: ShortTermRestrictedInvestmentsUSBankMoneyMarketDepositAccountMember        
Investments, fair value     2,463  
Investment, Identifier [Axis]: ShortTermUnrestrictedInvestmentsMember        
Investments, fair value     34,711  
Investment, Identifier [Axis]: ShortTermUnrestrictedInvestmentsUSBankMoneyMarketDepositAccountMember        
Investments, fair value     34,711  
Investment, Identifier [Axis]: ShorttermRestrictedInvestmentsMember        
Investments, fair value 2,675   2,675  
Investment, Identifier [Axis]: ShorttermRestrictedInvestmentsUSBankMoneyMarketDepositAccountOne        
Investments, fair value 2,675   2,675  
Investment, Identifier [Axis]: ShorttermUnrestrictedInvestmentsMember        
Investments, fair value 57,340   57,340  
Investment, Identifier [Axis]: ShorttermUnrestrictedInvestmentsUSBankMoneyMarketDepositAccountOne        
Investments, fair value $ 57,340   $ 57,340  
[1] The Company and CRFH are the members of the RoHo Joint Venture, a joint venture formed as a Delaware limited liability company that is not consolidated by either member for financial reporting purposes. The members make investments in the RoHo Joint Venture in the form of capital contributions as the RoHo Joint Venture makes investments or incurs expenses, and all portfolio and other material decisions regarding the RoHo Joint Venture must be submitted to the RoHo Joint Venture’s board of directors which is comprised of an equal number of directors appointed by each of the Company and CRFH. Accordingly, the Company does not have sole control over the RoHo Joint Venture.