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Schedule of Investments - USD ($)
3 Months Ended 12 Months Ended
Mar. 31, 2024
Dec. 31, 2023
Investments [Abstract]    
Amortized cost $ 358,082,609 $ 378,081,148 [1]
Fair value $ 353,676,708 $ 376,992,972 [2]
Percentage of net assets 185.00% 197.90%
Investment, Identifier [Axis]: 48forty Intermediate Holdings, Inc. First Lien Senior Secured Term Loan SOFR Spread 6.10% Interest Rate 11.43% Due 12/1/2026    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:Four8fortyIntermediateHoldingsIncFirstLienSeniorSecuredTermLoanSOFRSpread610InterestRate1143Due1212026Member [7] star:Four8fortyIntermediateHoldingsIncFirstLienSeniorSecuredTermLoanSOFRSpread610InterestRate1101Due1212026Member [10]
Investment, Significant Unobservable Input [true false] true [7] true [10]
Basis spread on variable rate 6.10% [7] 6.10% [10],[11]
Interest Rate 11.43% [7] 11.45% [10]
Acquisition date Oct. 11, 2022 [7] Oct. 11, 2022 [10]
Maturity date Dec. 01, 2026 [7] Dec. 01, 2026 [10]
Principal, Shares, Units $ 14,774,436 [7] $ 14,812,030 [10]
Amortized cost 14,268,603 [7] 14,299,832 [1],[10]
Fair value $ 13,654,534 [7] $ 13,807,774 [2],[10]
Percentage of net assets 7.10% [7] 7.20% [10]
Investment, Identifier [Axis]: Aerospace & Defense First Lien Senior Secured Term Loan    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:AerospaceDefenseFirstLienSeniorSecuredTermLoanMember star:AerospaceDefenseFirstLienSeniorSecuredTermLoanMember
Principal, Shares, Units $ 8,009,254 $ 7,828,281
Amortized cost 7,911,343 7,760,936 [1]
Fair value $ 7,617,318 $ 7,394,161 [2]
Percentage of net assets 3.80% 3.90%
Investment, Identifier [Axis]: Aerospace & Defense Warrants and Other Equity Securities    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:AerospaceDefenseWarrantsAndOtherEquitySecuritiesMember star:AerospaceDefenseWarrantsAndOtherEquitySecuritiesMember
Principal, Shares, Units $ 176 $ 176
Amortized cost 142,485 142,485 [1]
Fair value $ 0 $ 0 [2]
Percentage of net assets 0.00% 0.00%
Investment, Identifier [Axis]: Arrow Home Health, LLC (dba Acara Home Health) - Class 1 Units Preferred Equity Securities    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[13],[14] star:ArrowHomeHealthLLCDbaAcaraHomeHealthClass1UnitsPreferredEquitySecuritiesMember [12] star:ArrowHomeHealthLLCDbaAcaraHomeHealthClass1UnitsPreferredEquitySecuritiesMember [15]
Investment, Significant Unobservable Input [true false] [13],[14] true [12] true [15]
Basis spread on variable rate [13],[14] 0.00% [12] 0.00% [11],[15]
Interest Rate [13],[14],[15]   0.00%
Acquisition date [13],[14] Nov. 13, 2023 [12] Nov. 13, 2023 [15]
Principal, Shares, Units [13],[14] $ 56,005 [12] $ 56,005 [15]
Amortized cost [13],[14] 56,005 [12] 56,005 [1],[15]
Fair value [13],[14] $ 112,010 [12] $ 112,010 [2],[15]
Percentage of net assets [13],[14] 0.10% [12] 0.10% [15]
Investment, Identifier [Axis]: Arrow Home Health, LLC (dba Acara Home Health) - Class A Units Preferred Equity Securities Interest Rate 10.00% PIK    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[14],[16] star:ArrowHomeHealthLLCDbaAcaraHomeHealthPreferredEquitySecuritiesInterestRate1000PIKMember [12] star:ArrowHomeHealthLLCDbaAcaraHomeHealthClassAUnitsPreferredEquitySecuritiesInterestRate1000PIKMember [15]
Investment, Significant Unobservable Input [true false] [14],[16] true [12] true [15]
Basis spread on variable rate [14],[16] 0.00% [12] 0.00% [11],[15]
PIK Interest Rate [14],[16] 10.00% [12] 10.00% [15]
Acquisition date [14],[16] Mar. 19, 2021 [12] Mar. 19, 2021 [15]
Principal, Shares, Units [14],[16] $ 571,080 [12] $ 571,080 [15]
Amortized cost [14],[16] 564,321 [12] 564,321 [1],[15]
Fair value [14],[16] $ 185,898 [12] $ 202,097 [2],[15]
Percentage of net assets [14],[16] 0.10% [12] 0.10% [15]
Investment, Identifier [Axis]: Arrow Home Health, LLC (dba Acara Home Health) First Lien Senior Secured Term Loan SOFR Spread 8.50% Interest Rate 13.80% Due 3/19/2026    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[12],[17] star:ArrowHomeHealthLLCDbaAcaraHomeHealthFirstLienSeniorSecuredTermLoanSOFRSpread850InterestRate1380Due3192026Member  
Investment, Significant Unobservable Input [true false] [12],[17] true  
Basis spread on variable rate [12],[17] 8.50%  
Interest Rate [12],[17] 13.80%  
Acquisition date [12],[17] Mar. 19, 2021  
Maturity date [12],[17] Mar. 19, 2026  
Principal, Shares, Units [12],[17] $ 797,086  
Amortized cost [12],[17] 780,655  
Fair value [12],[17] $ 756,036  
Percentage of net assets [12],[17] 0.40%  
Investment, Identifier [Axis]: Arrow Home Health, LLC (dba Acara Home Health)First Lien Senior Secured Term Loan SOFR Spread 8.50% Interest Rate 13.83% Due 3/19/2026    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[15],[18]   star:ArrowHomeHealthLLCDbaAcaraHomeHealthFirstLienSeniorSecuredTermLoanSOFRSpread850InterestRate1341Due3192026Member
Investment, Significant Unobservable Input [true false] [15],[18]   true
Basis spread on variable rate [11],[15],[18]   8.50%
Interest Rate [15],[18]   13.83%
Acquisition date [15],[18]   Mar. 19, 2021
Maturity date [15],[18]   Mar. 19, 2026
Principal, Shares, Units [15],[18]   $ 797,086
Amortized cost [1],[15],[18]   780,141
Fair value [2],[15],[18]   $ 748,782
Percentage of net assets [15],[18]   0.40%
Investment, Identifier [Axis]: BB-HH Platform, Inc. (dba Preferred Care Home Health) First Lien Senior Secured Term Loan SOFR Spread 7.00% Plus 1.50 PIK Interest Rate 12.30 Plus 1.50% PIK Due 5/16/2028    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[17] star:BBHHPlatformIncDbaPreferredCareHomeHealthFirstLienSeniorSecuredTermLoanSOFRSpread700Plus150PIKInterestRate1230Plus150PIKDue5162028Member  
Investment, Significant Unobservable Input [true false] [17] true  
Basis spread on variable rate [17] 7.00%  
Paid in Kind Basis Spread Variable Rate [17] 1.50%  
Interest Rate [17] 12.30%  
PIK Interest Rate [17] 1.50%  
Acquisition date [17] May 16, 2023  
Maturity date [17] May 16, 2028  
Principal, Shares, Units [17] $ 6,686,576  
Amortized cost [17] 6,524,777  
Fair value [17] $ 6,639,101  
Percentage of net assets [17] 3.50%  
Investment, Identifier [Axis]: BB-HH Platform, Inc. (dba Preferred Care Home Health) First Lien Senior Secured Term Loan SOFR Spread 7.00% Plus 1.50 PIK Interest Rate 12.33 Plus 1.50% PIK Due 5/16/2028    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[18]   star:BBHHPlatformIncDbaPreferredCareHomeHealthFirstLienSeniorSecuredTermLoanSOFRSpread700CashPlus150PIKInterestRate1233CashPlus150PIKDue5162028Member
Investment, Significant Unobservable Input [true false] [18]   true
Basis spread on variable rate [11],[18]   7.00%
Paid in Kind Basis Spread Variable Rate [11],[18]   1.50%
Interest Rate [18]   12.33%
PIK Interest Rate [18]   1.50%
Acquisition date [18]   May 16, 2023
Maturity date [18]   May 16, 2028
Principal, Shares, Units [18]   $ 6,661,564
Amortized cost [1],[18]   6,476,196
Fair value [2],[18]   $ 6,600,944
Percentage of net assets [18]   3.50%
Investment, Identifier [Axis]: CHG Parent Holding LLC (dba Coop Home Goods) Warrants and Other Equity Securities    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[14] star:CHGParentHoldingLLCDbaCoopHomeGoodsWarrantsAndOtherEquitySecuritiesMember star:CHGParentHoldingLLCDbaCoopHomeGoodsWarrantsAndOtherEquitySecuritiesMember
Investment, Significant Unobservable Input [true false] [14] true true
Basis spread on variable rate [14] 0.00% 0.00% [11]
Interest Rate [14]   0.00%
Acquisition date [14] Jun. 18, 2021 Jun. 18, 2021
Principal, Shares, Units [14] $ 535,714 $ 535,714
Amortized cost [14] 535,714 535,714 [1]
Fair value [14] $ 358,571 $ 99,286 [2]
Percentage of net assets [14] 0.20% 0.10%
Investment, Identifier [Axis]: CSI IT, LLC (dba Consulting Solutions) First Lien Senior Secured Term Loan SOFR Spread 10.76% Interest Rate 16.06% Due 1/29/2026    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:CSIITLLCDbaConsultingSolutionsFirstLienSeniorSecuredTermLoanSOFRSpread1076InterestRate1606Due1292026Member [17] star:CSIITLLCDbaConsultingSolutionsFirstLienSeniorSecuredTermLoanLIBORSpread1050InterestRate1569Due1292026Member [18]
Investment, Significant Unobservable Input [true false] true [17] true [18]
Basis spread on variable rate 10.76% [17] 10.76% [11],[18]
Interest Rate 16.06% [17] 16.09% [18]
Acquisition date Jan. 29, 2021 [17] Jan. 29, 2021 [18]
Maturity date Jan. 29, 2026 [17] Jan. 29, 2026 [18]
Principal, Shares, Units $ 13,137,091 [17] $ 13,329,812 [18]
Amortized cost 12,972,100 [17] 13,139,755 [1],[18]
Fair value $ 13,152,856 [17] $ 13,196,514 [2],[18]
Percentage of net assets 6.90% [17] 6.90% [18]
Investment, Identifier [Axis]: Capone Holdings JV, LLC (dba LaSalle Staffing) Preferred Equity Securities    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[14] star:CaponeHoldingsJVLLCDbaLaSalleStaffingPreferredEquitySecuritiesMember star:CaponeHoldingsJVLLCDbaLaSalleStaffingPreferredEquitySecuritiesMember
Investment, Significant Unobservable Input [true false] [14] true true
Basis spread on variable rate [14] 0.00% 0.00% [11]
Interest Rate [14] 0.00% 0.00%
Acquisition date [14] Feb. 15, 2022 Feb. 15, 2022
Principal, Shares, Units [14] $ 4,000,000 $ 4,000,000
Amortized cost [14] 4,000,000 4,000,000 [1]
Fair value [14] $ 6,200,800 $ 6,047,467 [2]
Percentage of net assets [14] 3.20% 3.20%
Investment, Identifier [Axis]: Caregility Corporation First Lien Senior Secured Term Loan SOFR Spread 9.26% Interest Rate 3.00% Cash Plus 11.59% PIK Due 1/31/2025    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[15],[18],[19]   star:CaregilityCorporationFirstLienSeniorSecuredTermLoanSOFRSpread926InterestRate300CashPlus1159PIKDue1312025Member
Investment, Significant Unobservable Input [true false] [15],[18]   true
Basis spread on variable rate [11],[15],[18]   9.26%
Interest Rate [15],[18]   3.00%
PIK Interest Rate [15],[18]   11.59%
Acquisition date [15],[18]   Dec. 29, 2021
Maturity date [15],[18]   Jan. 31, 2025
Principal, Shares, Units [15],[18]   $ 2,244,216
Amortized cost [1],[15],[18]   1,933,490
Fair value [2],[15],[18]   $ 2,244,216
Percentage of net assets [15],[18]   1.20%
Investment, Identifier [Axis]: Caregility Corporation First Lien Senior Secured Term Loan SOFR Spread 9.26% Interest Rate 5.00% Plus 9.56% PIK Due 1/31/2025    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[12],[17] star:CaregilityCorporationFirstLienSeniorSecuredTermLoanSOFRSpread926InterestRate500Plus956PIKDue1312025Member  
Investment, Significant Unobservable Input [true false] [12],[17] true  
Basis spread on variable rate [12],[17] 9.26%  
Interest Rate [12],[17] 5.00%  
PIK Interest Rate [12],[17] 9.56%  
Acquisition date [12],[17] Dec. 29, 2021  
Maturity date [12],[17] Jan. 31, 2025  
Principal, Shares, Units [12],[17] $ 2,299,071  
Amortized cost [12],[17] 1,991,421  
Fair value [12],[17] $ 2,299,071  
Percentage of net assets [12],[17] 1.20%  
Investment, Identifier [Axis]: Caregility Corporation Series A Units Preferred Equity Securities Interest Rate 8.00% PIK    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[13],[16] star:CaregilityCorporationSeriesAUnitsPreferredEquitySecuritiesInterestRate800PIKMember [12] star:CaregilityCorporationPreferredEquitySecuritiesMember, star:CaregilityCorporationSeriesAUnitsPreferredEquitySecuritiesInterestRate800PIKMember [15],[20]
Investment, Significant Unobservable Input [true false] [13],[16] true [12] true [15]
Basis spread on variable rate [13],[16] 0.00% [12] 0.00% [11],[15]
PIK Interest Rate [13],[16] 8.00% [12] 8.00% [15]
Acquisition date [13],[16] Dec. 31, 2022 [12] Dec. 31, 2022 [15]
Principal, Shares, Units [13],[16] $ 151,018 [12] $ 151,018 [15]
Amortized cost [13],[16] 0 [12] 0 [1],[15]
Fair value [13],[16] $ 1,410,516 [12] $ 1,383,250 [2],[15]
Percentage of net assets [13],[16] 0.70% [12] 0.70% [15]
Investment, Identifier [Axis]: Caregility Corporation Series B Units Preferred Equity Securities Interest Rate 8.00% PIK    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[13],[16] star:CaregilityCorporationSeriesBUnitsPreferredEquitySecuritiesInterestRate800PIKMember [12] star:CaregilityCorporationSeriesBUnitsPreferredEquitySecuritiesInterestRate800PIKMember [15],[20]
Investment, Significant Unobservable Input [true false] [13],[16] true [12] true [15]
Basis spread on variable rate [13],[16] 0.00% [12] 0.00% [11],[15]
PIK Interest Rate [13],[16] 8.00% [12] 8.00% [15]
Acquisition date [13],[16] Jul. 03, 2023 [12] Jul. 03, 2023 [15]
Principal, Shares, Units [13],[16] $ 446,689 [12] $ 446,689 [15]
Amortized cost [13],[16] 3,591,494 [12] 3,591,494 [1],[15]
Fair value [13],[16] $ 4,123,371 [12] $ 4,108,869 [2],[15]
Percentage of net assets [13],[16] 2.20% [12] 2.20% [15]
Investment, Identifier [Axis]: Caregility Corporation Warrants and Other Equity Securities    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:CaregilityCorporationWarrantsAndOtherEquitySecuritiesMember [12] star:CaregilityCorporationWarrantsAndOtherEquitySecuritiesMember [15],[19]
Investment, Significant Unobservable Input [true false] true [12] true [15]
Basis spread on variable rate 0.00% [12] 0.00% [11],[15]
Interest Rate [12],[15]   0.00%
Acquisition date Dec. 29, 2021 [12] Dec. 29, 2021 [15]
Principal, Shares, Units $ 267,801 [12] $ 267,801 [15]
Amortized cost 443,392 [12] 443,392 [1],[15]
Fair value $ 157,426 [12] $ 571,189 [2],[15]
Percentage of net assets 0.10% [12] 0.30% [15]
Investment, Identifier [Axis]: Channel Factory Holdings, LLC Preferred Equity Securities Interest Rate 5.00% Plus 5.00% PIK    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[13],[14] star:ChannelFactoryHoldingsLLCPreferredEquitySecuritiesInterestRate500Plus500PIKMember star:ChannelFactoryHoldingsLLCPreferredEquitySecuritiesInterestRate500Plus500PIKMember [20]
Investment, Significant Unobservable Input [true false] [13],[14] true true
Basis spread on variable rate [13],[14] 0.00% 0.00% [11]
Interest Rate [13],[14] 5.00% 5.00%
PIK Interest Rate [13],[14] 5.00% 5.00%
Acquisition date [13],[14] Aug. 27, 2020 Aug. 27, 2020
Principal, Shares, Units [13],[14] $ 2,381,867 $ 2,381,867
Amortized cost [13],[14] 2,442,592 2,442,592 [1]
Fair value [13],[14] $ 4,499,630 $ 4,154,769 [2]
Percentage of net assets [13],[14] 2.40% 2.20%
Investment, Identifier [Axis]: Chemicals First Lien Senior Secured Term Loan    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:ChemicalsFirstLienSeniorSecuredTermLoanMember star:ChemicalsFirstLienSeniorSecuredTermLoanMember
Principal, Shares, Units $ 14,925,000 $ 14,962,500
Amortized cost 14,560,767 14,538,407 [1]
Fair value $ 14,695,154 $ 14,538,406 [2]
Percentage of net assets 7.70% 7.50%
Investment, Identifier [Axis]: Chicken Soup For The Soul, LLC First Lien Senior Secured Term Loan SOFR Spread 8.60% Interest Rate 13.95% Due 3/31/2024    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[10]   star:ChickenSoupForTheSoulLLCFirstLienSeniorSecuredTermLoanLIBORSpread850InterestRate1336Due3312024Member
Investment, Significant Unobservable Input [true false] [10]   true
Basis spread on variable rate [10],[11]   8.60%
Interest Rate [10]   13.95%
Acquisition date [10]   Oct. 29, 2021
Maturity date [10]   Mar. 31, 2024
Principal, Shares, Units [10]   $ 6,380,856
Amortized cost [1],[10]   6,368,361
Fair value [2],[10]   $ 5,756,809
Percentage of net assets [10]   3.00%
Investment, Identifier [Axis]: Chicken Soup for The Soul, LLC First Lien Senior Secured Term Loan SOFR Spread 8.60% Interest Rate 13.93% Due 3/31/2024    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[7],[8],[9],[21] star:ChickenSoupForTheSoulLLCFirstLienSeniorSecuredTermLoanSOFRSpread860InterestRate1393Due3312024Member  
Investment, Significant Unobservable Input [true false] [7],[21] true  
Basis spread on variable rate [7],[21] 8.60%  
Interest Rate [7],[21] 13.93%  
Acquisition date [7],[21] Oct. 29, 2021  
Maturity date [7],[21] Mar. 31, 2024  
Principal, Shares, Units [7],[21] $ 6,380,856  
Amortized cost [7],[21] 6,380,856  
Fair value [7],[21] $ 3,086,420  
Percentage of net assets [7],[21] 1.60%  
Investment, Identifier [Axis]: Clearview Systems, LLC (dba Rip-It) First Lien Senior Secured Term Loan SOFR Spread 7.65% Interest Rate 12.95% Plus 3.00% PIK Due 10/11/2027    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[17],[22] star:ClearviewSystemsLLCDbaRipItFirstLienSeniorSecuredTermLoanSOFRSpread765InterestRate1295Plus300PIKDue10112027Member  
Investment, Significant Unobservable Input [true false] [17],[22] true  
Basis spread on variable rate [17],[22] 7.65%  
Interest Rate [17],[22] 12.95%  
PIK Interest Rate [17],[22] 3.00%  
Acquisition date [17],[22] Oct. 11, 2022  
Maturity date [17],[22] Oct. 11, 2027  
Principal, Shares, Units [17],[22] $ 6,508,116  
Amortized cost [17],[22] 6,397,426  
Fair value [17],[22] $ 6,207,441  
Percentage of net assets [17],[22] 3.20%  
Investment, Identifier [Axis]: Clearview Systems, LLC (dba Rip-It) First Lien Senior Secured Term Loan SOFR Spread 7.65% Interest Rate 12.98% Due 10/11/2027    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[18],[22]   star:ClearviewSystemsLLCDbaRipItFirstLienSeniorSecuredTermLoanSOFRSpread765InterestRate1298Due10112027Member
Investment, Significant Unobservable Input [true false] [18],[22]   true
Basis spread on variable rate [11],[18],[22]   7.65%
Interest Rate [18],[22]   12.98%
Acquisition date [18],[22]   Oct. 11, 2022
Maturity date [18],[22]   Oct. 11, 2027
Principal, Shares, Units [18],[22]   $ 6,452,101
Amortized cost [1],[18],[22]   6,333,920
Fair value [2],[18],[22]   $ 6,367,578
Percentage of net assets [18],[22]   3.30%
Investment, Identifier [Axis]: Commercial Services & Supplies First Lien Senior Secured Term Loan    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:CommercialServicesSuppliesFirstLienSeniorSecuredTermLoanMember star:CommercialServicesSuppliesFirstLienSeniorSecuredTermLoanMember
Principal, Shares, Units $ 3,979,921 $ 11,255,312
Amortized cost 3,930,791 11,128,632 [1]
Fair value $ 3,707,010 $ 11,055,036 [2]
Percentage of net assets 2.00% 5.70%
Investment, Identifier [Axis]: Commercial Services and Supplies Preferred Equity Securities    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:CommercialServicesAndSuppliesPreferredEquitySecuritiesMember star:CommercialServicesAndSuppliesPreferredEquitySecuritiesMember
Principal, Shares, Units $ 192,444 $ 192,444
Amortized cost 183,612 183,612 [1]
Fair value $ 202,157 $ 227,311 [2]
Percentage of net assets 0.10% 0.10%
Investment, Identifier [Axis]: Consolidated Machine & Tool Holdings, LLC First Lien Senior Secured Term Loan Interest Rate 20.00% PIK Due 1/15/2025    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[13] star:ConsolidatedMachineToolHoldingsLLCFirstLienSeniorSecuredTermLoanInterestRate2000PIKDue1152025Member [23],[24],[25] star:ConsolidatedMachineAndToolHoldingsLLCFirstLienSeniorSecuredTermLoanSOFRSpread2000PIKDue1152025Member [19],[26]
Investment, Significant Unobservable Input [true false] [13] true [23],[24],[25] true [19],[26]
Basis spread on variable rate [13] 0.00% [23],[24],[25] 0.00% [11],[19],[26]
PIK Interest Rate [13] 20.00% [23],[24],[25] 20.00% [19],[26]
Acquisition date [13] Nov. 22, 2023 [23],[24],[25] Nov. 22, 2023 [19],[26]
Maturity date [13] Jan. 15, 2025 [23],[24],[25] Jan. 15, 2025 [19],[26]
Principal, Shares, Units [13] $ 621,602 [23],[24],[25] $ 440,629 [19],[26]
Amortized cost [13] 614,566 [23],[24],[25] 437,211 [1],[19],[26]
Fair value [13] $ 614,564 [23],[24],[25] $ 437,210 [2],[19],[26]
Percentage of net assets [13] 0.20% [23],[24],[25] 0.20% [19],[26]
Investment, Identifier [Axis]: Consolidated Machine & Tool Holdings, LLC First Lien Senior Secured Term Loan SOFR Spread 11.01% Interest Rate 11.42% Plus 4.90% PIK Due 1/15/2025    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[17],[24],[25] star:ConsolidatedMachineToolHoldingsLLCFirstLienSeniorSecuredTermLoanSOFRSpread1101InterestRate1142Plus490PIKDue1152025Member  
Investment, Significant Unobservable Input [true false] [17],[24],[25] true  
Basis spread on variable rate [17],[24],[25] 11.01%  
Interest Rate [17],[24],[25] 11.42%  
PIK Interest Rate [17],[24],[25] 4.90%  
Acquisition date [17],[24],[25] Jan. 15, 2020  
Maturity date [17],[24],[25] Jan. 15, 2025  
Principal, Shares, Units [17],[24],[25] $ 6,093,316  
Amortized cost [17],[24],[25] 6,069,876  
Fair value [17],[24],[25] $ 5,775,853  
Percentage of net assets [17],[24],[25] 3.00%  
Investment, Identifier [Axis]: Consolidated Machine & Tool Holdings, LLC First Lien Senior Secured Term Loan SOFR Spread 11.01% Interest Rate 11.42% Plus 4.97% PIK Due 1/15/2025    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[17],[24],[25] star:ConsolidatedMachineToolHoldingsLLCFirstLienSeniorSecuredTermLoanSOFRSpread1101PlusInterestRate1142Plus497PIKDue1152025Member  
Investment, Significant Unobservable Input [true false] [17],[24],[25] true  
Basis spread on variable rate [17],[24],[25] 11.01%  
Interest Rate [17],[24],[25] 11.42%  
PIK Interest Rate [17],[24],[25] 4.97%  
Acquisition date [17],[24],[25] Jan. 19, 2023  
Maturity date [17],[24],[25] Jan. 15, 2025  
Principal, Shares, Units [17],[24],[25] $ 1,294,336  
Amortized cost [17],[24],[25] 1,226,901  
Fair value [17],[24],[25] $ 1,226,901  
Percentage of net assets [17],[24],[25] 0.60%  
Investment, Identifier [Axis]: Consolidated Machine & Tool Holdings, LLC Warrants and Other Equity Securities    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[14] star:ConsolidatedMachineToolHoldingsLLCWarrantsAndOtherEquitySecuritiesMember [27] star:ConsolidatedMachineToolHoldingsLLCWarrantsAndOtherEquitySecuritiesMember [10],[28],[29]
Investment, Significant Unobservable Input [true false] [14] true [27] true [29]
Basis spread on variable rate [14] 0.00% [27] 0.00% [11],[29]
Interest Rate [14],[27],[29]   0.00%
Acquisition date [14] Jan. 15, 2020 [27] Jan. 15, 2020 [29]
Principal, Shares, Units [14] $ 176 [27] $ 176 [29]
Amortized cost [14] 142,485 [27] 142,485 [1],[29]
Fair value [14] $ 0 [27] $ 0 [2],[29]
Percentage of net assets [14] 0.00% [27] 0.00% [29]
Investment, Identifier [Axis]: Consolidated Machine and Tool Holdings, LLC First Lien Senior Secured Term Loan SOFR Spread 11.01% Interest rate 11.44% Cash 4.90% PIK Due 1/15/2025    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[12],[18],[26]   star:ConsolidatedMachineAndToolHoldingsLLCFirstLienSeniorSecuredTermLoanSOFRSpread1101InterestRate1144Cash490PIKDue1152025Member
Investment, Significant Unobservable Input [true false] [18],[26]   true
Basis spread on variable rate [11],[18],[26]   11.01%
Interest Rate [18],[26]   11.44%
PIK Interest Rate [18],[26]   4.90%
Acquisition date [18],[26]   Jan. 15, 2020
Maturity date [18],[26]   Jan. 15, 2025
Principal, Shares, Units [18],[26]   $ 7,387,652
Amortized cost [1],[18],[26]   7,323,725
Fair value [2],[18],[26]   $ 6,956,951
Percentage of net assets [18],[26]   3.70%
Investment, Identifier [Axis]: Construction & Engineering First Lien Senior Secured Term Loan    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:ConstructionEngineeringFirstLienSeniorSecuredTermLoanMember star:ConstructionEngineeringFirstLienSeniorSecuredTermLoanMember
Principal, Shares, Units $ 51,832,314 $ 53,035,735
Amortized cost 50,880,241 52,047,015 [1]
Fair value $ 50,957,883 $ 50,278,748 [2]
Percentage of net assets 26.60% 26.40%
Investment, Identifier [Axis]: Construction & Engineering Preferred Equity Securities    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:ConstructionEngineeringPreferredEquitySecuritiesMember star:ConstructionEngineeringPreferredEquitySecuritiesMember
Principal, Shares, Units $ 190,308 $ 189,043
Amortized cost 6,392,714 5,153,950 [1]
Fair value $ 3,883,211 $ 3,322,215 [2]
Percentage of net assets 2.00% 1.80%
Investment, Identifier [Axis]: Construction & Engineering Warrants and Other Equity Securities    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:ConstructionEngineeringWarrantsAndOtherEquitySecuritiesMember star:ConstructionEngineeringWarrantsAndOtherEquitySecuritiesMember
Principal, Shares, Units $ 1,194 $ 1,117
Amortized cost 939,949 939,949 [1]
Fair value $ 2,449,421 $ 1,939,562 [2]
Percentage of net assets 1.30% 1.00%
Investment, Identifier [Axis]: Consumer Finance First Lien Senior Secured Term Loan    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:ConsumerFinanceFirstLienSeniorSecuredTermLoanMember star:ConsumerFinanceFirstLienSeniorSecuredTermLoanMember
Principal, Shares, Units $ 3,427,073 $ 3,427,073
Amortized cost 3,418,199 3,407,754 [1]
Fair value $ 3,427,073 $ 3,427,073 [2]
Percentage of net assets 1.80% 1.80%
Investment, Identifier [Axis]: Consumer Finance Warrants and Other Equity Securities    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:ConsumerFinanceWarrantsAndOtherEquitySecuritiesMember star:ConsumerFinanceWarrantsAndOtherEquitySecuritiesMember
Principal, Shares, Units $ 164,332 $ 164,332
Amortized cost 0 0 [1]
Fair value $ 318,483 $ 190,807 [2]
Percentage of net assets 0.20% 0.10%
Investment, Identifier [Axis]: Coop Home Goods LLC (dba Coop Home Goods) First Lien Senior Secured Term Loan SOFR Spread 8.26% Interest Rate 13.56% Due 6/18/2026    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[17],[22] star:CoopHomeGoodsLLCDbaCoopHomeGoodsFirstLienSeniorSecuredTermLoanSOFRSpread826InterestRate1356Due6182026Member  
Investment, Significant Unobservable Input [true false] [17],[22] true  
Basis spread on variable rate [17],[22] 8.26%  
Interest Rate [17],[22] 13.56%  
Acquisition date [17],[22] Jun. 18, 2021  
Maturity date [17],[22] Jun. 18, 2026  
Principal, Shares, Units [17],[22] $ 4,387,729  
Amortized cost [17],[22] 4,341,201  
Fair value [17],[22] $ 4,387,729  
Percentage of net assets [17],[22] 2.30%  
Investment, Identifier [Axis]: Coop Home Goods LLC (dba Coop Home Goods) First Lien Senior Secured Term Loan SOFR Spread 8.26% Interest Rate 13.59% Due 6/18/2026    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[12],[18],[22]   star:CoopHomeGoodsLLCDbaCoopHomeGoodsFirstLienSeniorSecuredTermLoanSOFRSpread826InterestRate1359Due6182026Member
Investment, Significant Unobservable Input [true false] [18],[22]   true
Basis spread on variable rate [11],[18],[22]   8.26%
Interest Rate [18],[22]   13.59%
Acquisition date [18],[22]   Jun. 18, 2021
Maturity date [18],[22]   Jun. 18, 2026
Principal, Shares, Units [18],[22]   $ 4,387,729
Amortized cost [1],[18],[22]   4,335,754
Fair value [2],[18],[22]   $ 4,365,790
Percentage of net assets [18],[22]   2.30%
Investment, Identifier [Axis]: CorTech, LLC Second Lien Senior Secured Loan LIBOR Spread 6.35% Interest Rate 11.75% Due 9/30/2025    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[18]   star:CorTechLLCSecondLienSeniorSecuredLoanLIBORSpread625InterestRate1144Due9302025Member
Investment, Significant Unobservable Input [true false] [18]   true
Basis spread on variable rate [11],[18]   6.35%
Interest Rate [18]   11.68%
Acquisition date [18]   Mar. 13, 2020
Maturity date [18]   Sep. 30, 2025
Principal, Shares, Units [18]   $ 6,359,542
Amortized cost [1],[18]   6,305,249
Fair value [2],[18]   $ 6,059,372
Percentage of net assets [18]   3.20%
Investment, Identifier [Axis]: CorTech, LLC Second Lien Senior Secured Loan SOFR Spread 6.35% Interest Rate 11.65% Due 9/30/2025    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[17] star:CorTechLLCSecondLienSeniorSecuredLoanSOFRSpread635InterestRate1165Due9302025Member  
Investment, Significant Unobservable Input [true false] [17] true  
Basis spread on variable rate [17] 6.35%  
Interest Rate [17] 11.65%  
Acquisition date [17] Mar. 13, 2020  
Maturity date [17] Sep. 30, 2025  
Principal, Shares, Units [17] $ 6,308,645  
Amortized cost [17] 6,248,112  
Fair value [17] $ 6,067,024  
Percentage of net assets [17] 3.20%  
Investment, Identifier [Axis]: DCCM, LLC First Lien Senior Secured Term Loan SOFR Spread 6.76% Plus 1.00% Interest Rate 12.06% Plus 1.00% Due 12/30/2026    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:DCCMLLCFirstLienSeniorSecuredTermLoanSOFRSpread676Plus100InterestRate1206Plus100Due12302026Member [17] star:DCCMLLCFirstLienSeniorSecuredTermLoanLIBORSpread690InterestRate1209Due12302026Member [18]
Investment, Significant Unobservable Input [true false] true [17] true [18]
Basis spread on variable rate 6.76% [17] 7.16% [11],[18]
Paid in Kind Basis Spread Variable Rate [17] 1.00%  
Interest Rate 12.06% [17] 12.49% [18]
PIK Interest Rate [17] 1.00%  
Acquisition date Aug. 06, 2021 [17] Aug. 06, 2021 [18]
Maturity date Dec. 30, 2026 [17] Dec. 30, 2026 [18]
Principal, Shares, Units $ 18,330,762 [17] $ 18,409,233 [18]
Amortized cost 18,099,900 [17] 18,151,330 [1],[18]
Fair value $ 18,514,069 [17] $ 18,201,208 [2],[18]
Percentage of net assets 9.70% [17] 9.60% [18]
Investment, Identifier [Axis]: DCCM, LLC Warrants and Other Equity Securities    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[14] star:DCCMLLCWarrantsAndOtherEquitySecuritiesMember star:DCCMLLCWarrantsAndOtherEquitySecuritiesMember
Investment, Significant Unobservable Input [true false] [14] true true
Basis spread on variable rate [14] 0.00% 0.00% [11]
Interest Rate [14]   0.00%
Acquisition date [14] Aug. 06, 2021 Aug. 06, 2021
Principal, Shares, Units [14] $ 897 $ 897
Amortized cost [14] 939,949 939,949 [1]
Fair value [14] $ 1,628,015 $ 1,045,109 [2]
Percentage of net assets [14] 0.90% 0.50%
Investment, Identifier [Axis]: Distributors First Lien Senior Secured Term Loan    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:DistributorsFirstLienSeniorSecuredTermLoanMember star:DistributorsFirstLienSeniorSecuredTermLoanMember
Principal, Shares, Units $ 14,774,436 $ 14,812,030
Amortized cost 14,268,603 14,299,832 [1]
Fair value $ 13,654,534 $ 13,807,774 [2]
Percentage of net assets 7.10% 7.20%
Investment, Identifier [Axis]: Diversified Consumer Services First Lien Senior Secured Term Loan    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:DiversifiedConsumerServicesFirstLienSeniorSecuredTermLoanMember star:DiversifiedConsumerServicesFirstLienSeniorSecuredTermLoanMember
Principal, Shares, Units $ 14,903,034 $ 15,000,652
Amortized cost 14,834,632 14,905,882 [1]
Fair value $ 14,999,864 $ 15,000,652 [2]
Percentage of net assets 7.80% 7.90%
Investment, Identifier [Axis]: Diversified Consumer Services Warrants and Other Equity Securities    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:DiversifiedConsumerServicesWarrantsAndOtherEquitySecuritiesMember star:DiversifiedConsumerServicesWarrantsAndOtherEquitySecuritiesMember
Principal, Shares, Units $ 12,693 $ 12,693
Amortized cost 0 0 [1]
Fair value $ 168,850 $ 181,524 [2]
Percentage of net assets 0.10% 0.10%
Investment, Identifier [Axis]: Diversified Financials Fund Investments    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:DiversifiedFinancialsFundInvestmentsMember star:DiversifiedFinancialsFundInvestmentsMember
Principal, Shares, Units $ 2,855,855 $ 2,898,305
Amortized cost 2,898,305 2,898,305 [1]
Fair value $ 2,818,111 $ 2,809,327 [2]
Percentage of net assets 1.50% 1.50%
Investment, Identifier [Axis]: Diversified Telecommunication Services First Lien Senior Secured Term Loan    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:DiversifiedTelecommunicationServicesFirstLienSeniorSecuredTermLoanMember star:DiversifiedTelecommunicationServicesFirstLienSeniorSecuredTermLoanMember
Principal, Shares, Units $ 21,520,033 $ 20,951,616
Amortized cost 20,781,240 20,222,254 [1]
Fair value $ 21,404,912 $ 21,123,326 [2]
Percentage of net assets 11.20% 11.10%
Investment, Identifier [Axis]: Diversified Telecommunication Services Preferred Equity Securities    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:DiversifiedTelecommunicationServicesPreferredEquitySecuritiesMember star:DiversifiedTelecommunicationServicesPreferredEquitySecuritiesMember
Principal, Shares, Units $ 4,708,702 $ 4,708,702
Amortized cost 6,718,484 6,718,484 [1]
Fair value $ 8,573,241 $ 8,557,688 [2]
Percentage of net assets 4.50% 4.50%
Investment, Identifier [Axis]: Diversified Telecommunication Services Warrants and Other Equity Securities    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:DiversifiedTelecommunicationServicesWarrantsAndOtherEquitySecuritiesMember star:DiversifiedTelecommunicationServicesWarrantsAndOtherEquitySecuritiesMember
Principal, Shares, Units $ 344,996 $ 344,996
Amortized cost 443,392 443,392 [1]
Fair value $ 796,358 $ 1,153,829 [2]
Percentage of net assets 0.40% 0.60%
Investment, Identifier [Axis]: Douglas Products and Packaging Company, LLC First Lien Senior Secured Term Loan SOFR Spread 6.90% Interest Rate 12.23% Due 9/20/2028    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[7],[8],[9],[22] star:DouglasProductsAndPackagingCompanyLLCFirstLienSeniorSecuredTermLoanSOFRSpread690InterestRate1223Due9202028Member  
Basis spread on variable rate [7],[22] 6.90%  
Interest Rate [7],[22] 12.23%  
Acquisition date [7],[22] Sep. 20, 2023  
Maturity date [7],[22] Sep. 20, 2028  
Principal, Shares, Units [7],[22] $ 14,925,000  
Amortized cost [7],[22] 14,560,767  
Fair value [7],[22] $ 14,695,154  
Percentage of net assets [7],[22] 7.70%  
Investment, Identifier [Axis]: Douglas Products and Packaging Company, LLC First Lien Senior Secured Term Loan SOFR Spread 6.90% PIK Interest rate 12.25%Due 9/20/2028    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[10],[22]   star:DouglasProductsAndPackagingCompanyLLCFirstLienSeniorSecuredTermLoanSOFRSpread690PIKInterestRate1225Due9202028Member
Investment, Significant Unobservable Input [true false] [10],[22]   true
Basis spread on variable rate [10],[11],[22]   6.90%
Interest Rate [10],[22]   12.25%
Acquisition date [10],[22]   Sep. 20, 2023
Maturity date [10],[22]   Sep. 20, 2028
Principal, Shares, Units [10],[22]   $ 14,962,500
Amortized cost [1],[10],[22]   14,538,407
Fair value [2],[10],[22]   $ 14,538,406
Percentage of net assets [10],[22]   7.50%
Investment, Identifier [Axis]: Electrical Equipment First Lien Senior Secured Term Loan    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:ElectricalEquipmentFirstLienSeniorSecuredTermLoanMember star:ElectricalEquipmentFirstLienSeniorSecuredTermLoanMember
Principal, Shares, Units $ 8,840,576 $ 8,521,445
Amortized cost 8,676,598 8,357,466 [1]
Fair value $ 7,029,142 $ 6,935,604 [2]
Percentage of net assets 3.70% 3.60%
Investment, Identifier [Axis]: Electrical Equipment Senior Unsecured Notes    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:ElectricalEquipmentSeniorUnsecuredNotesMember star:ElectricalEquipmentSeniorUnsecuredNotesMember
Investment, Significant Unobservable Input [true false] true true
Principal, Shares, Units $ 2,067,881 $ 2,067,881
Amortized cost 2,033,098 2,033,098 [1]
Fair value $ 1,265,130 $ 1,384,446 [2]
Percentage of net assets 0.70% 0.70%
Investment, Identifier [Axis]: Electrical Equipment Warrants and Other Equity Securities    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:ElectricalEquipmentWarrantsAndOtherEquitySecuritiesMember star:ElectricalEquipmentWarrantsAndOtherEquitySecuritiesMember
Principal, Shares, Units $ 190,019 $ 190,019
Amortized cost 0 0 [1]
Fair value $ 0 $ 0 [2]
Percentage of net assets 0.00% 0.00%
Investment, Identifier [Axis]: Entertainment First Lien Senior Secured Term Loan    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:EntertainmentFirstLienSeniorSecuredTermLoanMember star:EntertainmentFirstLienSeniorSecuredTermLoanMember
Principal, Shares, Units $ 17,476,130 $ 17,485,872
Amortized cost 17,259,954 17,257,718 [1]
Fair value $ 14,308,368 $ 16,861,825 [2]
Percentage of net assets 7.50% 8.80%
Investment, Identifier [Axis]: Entertainment Preferred Equity Securities    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:EntertainmentPreferredEquitySecuritiesMember star:EntertainmentPreferredEquitySecuritiesMember
Principal, Shares, Units $ 971 $ 971
Amortized cost 955,843 955,843 [1]
Fair value $ 1,115,446 $ 1,088,481 [2]
Percentage of net assets 0.60% 0.60%
Investment, Identifier [Axis]: Entertainment Warrants and Other Equity Securities    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:EntertainmentWarrantsAndOtherEquitySecuritiesMember star:EntertainmentWarrantsAndOtherEquitySecuritiesMember
Principal, Shares, Units $ 2 $ 2
Amortized cost 43,478 43,478 [1]
Fair value $ 502,800 $ 528,569 [2]
Percentage of net assets 0.30% 0.30%
Investment, Identifier [Axis]: Food Products First Lien Senior Secured Term Loan    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:FoodProductsFirstLienSeniorSecuredTermLoanMember star:FoodProductsFirstLienSeniorSecuredTermLoanMember
Principal, Shares, Units $ 7,101,095 $ 7,146,952
Amortized cost 6,980,808 7,017,250 [1]
Fair value $ 7,142,992 $ 7,146,952 [2]
Percentage of net assets 3.70% 3.80%
Investment, Identifier [Axis]: Food Products Preferred Equity Securities    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:FoodProductsPreferredEquitySecuritiesMember star:FoodProductsPreferredEquitySecuritiesMember
Principal, Shares, Units $ 2,829,787 $ 2,829,787
Amortized cost 2,829,787 2,829,787 [1]
Fair value $ 4,252,128 $ 4,482,681 [2]
Percentage of net assets 2.20% 2.40%
Investment, Identifier [Axis]: Food Products Warrants and Other Equity Securities    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:FoodProductsWarrantsAndOtherEquitySecuritiesMember star:FoodProductsWarrantsAndOtherEquitySecuritiesMember
Principal, Shares, Units $ 127,215 $ 127,215
Amortized cost 0 0 [1]
Fair value $ 47,064 $ 53,021 [2]
Percentage of net assets 0.00% 0.00%
Investment, Identifier [Axis]: Fremont-Wright, LLC First Lien Senior Secured Term Loan SOFR Spread 9.10% Interest Rate 14.43% Due 12/2/2024    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:FremontWrightLLCFirstLienSeniorSecuredTermLoanSOFRSpread910InterestRate1443Due1222024Member [7] star:FremontWrightLLCFirstLienSeniorSecuredTermLoanLIBORSpread900InterestRate1386Due1222024Member [10]
Investment, Significant Unobservable Input [true false] true [7] true [10]
Basis spread on variable rate 9.10% [7] 9.10% [10],[11]
Interest Rate 14.43% [7] 14.45% [10]
Acquisition date Dec. 02, 2020 [7] Dec. 02, 2020 [10]
Maturity date Dec. 02, 2024 [7] Dec. 02, 2024 [10]
Principal, Shares, Units $ 4,240,339 [7] $ 4,258,824 [10]
Amortized cost 4,219,452 [7] 4,233,922 [1],[10]
Fair value $ 4,240,339 [7] $ 4,246,047 [2],[10]
Percentage of net assets 2.20% [7] 2.20% [10]
Investment, Identifier [Axis]: Fremont-Wright, LLC Warrants and Other Equity Securities    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:FremontWrightLLCWarrantsAndOtherEquitySecuritiesMember star:FremontWrightLLCWarrantsAndOtherEquitySecuritiesMember
Investment, Significant Unobservable Input [true false] true true
Basis spread on variable rate 0.00% 0.00% [11]
Interest Rate   0.00%
Acquisition date Dec. 02, 2020 Dec. 02, 2020
Principal, Shares, Units $ 2 $ 2
Amortized cost 0 0 [1]
Fair value $ 821,406 $ 894,453 [2]
Percentage of net assets 0.40% 0.50%
Investment, Identifier [Axis]: Fund Investments    
Investments [Abstract]    
Investment, Type [Extensible Enumeration] [3],[4],[5],[6],[8],[9] Fund Investments [Member] Fund Investments [Member]
Amortized cost $ 2,898,305 $ 2,898,305 [1]
Fair value $ 2,818,111 $ 2,809,327 [2]
Percentage of net assets 1.50% 1.50%
Investment, Identifier [Axis]: Gateway Dealer Network, LLC First Lien Senior Secured Term Loan SOFR Spread 7.85% Interest Rate 13.20% Due 6/30/2027    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[10],[12],[22]   star:GatewayDealerNetworkLLCFirstLienSeniorSecuredTermLoanSOFRSpread785InterestRate1320Due6302027Member
Investment, Significant Unobservable Input [true false] [10],[22]   true
Basis spread on variable rate [10],[11],[22]   7.85%
Interest Rate [10],[22]   13.20%
Acquisition date [10],[22]   Jun. 30, 2022
Maturity date [10],[22]   Jun. 30, 2027
Principal, Shares, Units [10],[22]   $ 8,594,363
Amortized cost [1],[10],[22]   8,494,408
Fair value [2],[10],[22]   $ 8,594,363
Percentage of net assets [10],[22]   4.50%
Investment, Identifier [Axis]: Gridsource Holdings, LLC Preferred Equity Securities Interest Rate 8.00% PIK    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[14],[16] star:GridsourceHoldingsLLCPreferredEquitySecuritiesInterestRate800PIKMember star:GridsourceHoldingsLLCPreferredEquitySecuritiesInterestRate800PIKMember [20]
Investment, Significant Unobservable Input [true false] [14],[16] true true
Basis spread on variable rate [14],[16] 0.00% 0.00% [11]
PIK Interest Rate [14],[16] 8.00% 8.00%
Acquisition date [14],[16] Mar. 09, 2023 Mar. 09, 2023
Principal, Shares, Units [14],[16] $ 3,959,977 $ 3,959,977
Amortized cost [14],[16] 799,597 799,597 [1]
Fair value [14],[16] $ 985,363 $ 1,138,860 [2]
Percentage of net assets [14],[16] 0.50% 0.60%
Investment, Identifier [Axis]: Gridsource Incorporated, LLC First Lien Senior Secured Term Loan SOFR Spread 8.50% Interest Rate 13.80% Due 12/16/2027    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:GridsourceIncorporatedLLCFirstLienSeniorSecuredTermLoanSOFRSpread850InterestRate1380Due12162027Member [17] star:GridsourceIncorporatedLLCFirstLienSeniorSecuredTermLoanSOFRSpread850InterestRate1341Due12162027Member [18]
Investment, Significant Unobservable Input [true false] true [17] true [18]
Basis spread on variable rate 8.50% [17] 8.50% [11],[18]
Interest Rate 13.80% [17] 13.83% [18]
Acquisition date Dec. 16, 2022 [17] Dec. 16, 2022 [18]
Maturity date Dec. 16, 2027 [17] Dec. 16, 2027 [18]
Principal, Shares, Units $ 14,039,156 [17] $ 14,074,595 [18]
Amortized cost 13,655,519 [17] 13,688,488 [1],[18]
Fair value $ 13,924,035 [17] $ 14,246,305 [2],[18]
Percentage of net assets 7.30% [17] 7.50% [18]
Investment, Identifier [Axis]: HH Masterwork Intermediate, Inc. Senior Unsecured Notes Interest Rate 17.00% PIK Due 5/17/2028    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:HHMasterworkIntermediateIncSeniorUnsecuredNotesInterestRate1700PIKDue5172028Member [16],[30] star:HHMasterworkIntermediateIncSeniorUnsecuredNotesInterestRate1700PIKDue5172028Member
Investment, Significant Unobservable Input [true false] true [16],[30] true
Basis spread on variable rate 0.00% [16],[30] 0.00% [11]
PIK Interest Rate 17.00% [16],[30] 17.00%
Acquisition date Nov. 17, 2022 [16],[30] Nov. 17, 2022
Maturity date May 17, 2028 [16],[30] May 17, 2028
Principal, Shares, Units $ 2,067,881 [16],[30] $ 2,067,881
Amortized cost 2,033,098 [16],[30] 2,033,098 [1]
Fair value $ 1,265,130 [16],[30] $ 1,384,446 [2]
Percentage of net assets 0.70% [16],[30] 0.70%
Investment, Identifier [Axis]: HH Masterwork Intermediate, Inc. Warrants and Other Equity Securities Due 11/17/2027    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:HHMasterworkIntermediateIncWarrantsAndOtherEquitySecuritiesDue11172027Member star:HHMasterworkIntermediateIncWarrantsAndOtherEquitySecuritiesDue11172027Member
Investment, Significant Unobservable Input [true false] true true
Basis spread on variable rate 0.00% 0.00% [11]
Interest Rate   0.00%
Acquisition date   Nov. 17, 2022
Maturity date Nov. 17, 2027 Nov. 17, 2027
Principal, Shares, Units $ 190,019 $ 190,019
Amortized cost 0 0 [1]
Fair value $ 0 $ 0 [2]
Percentage of net assets 0.00% 0.00%
Investment, Identifier [Axis]: Healthcare Providers & Services First Lien Senior Secured Term Loan    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:HealthcareProvidersServicesFirstLienSeniorSecuredTermLoanMember star:HealthcareProvidersServicesFirstLienSeniorSecuredTermLoanMember
Principal, Shares, Units $ 42,724,270 $ 42,503,656
Amortized cost 41,521,524 41,247,262 [1]
Fair value $ 39,742,015 $ 39,727,544 [2]
Percentage of net assets 20.80% 20.80%
Investment, Identifier [Axis]: Healthcare Providers & Services Preferred Equity Securities    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:HealthcareProvidersServicesPreferredEquitySecuritiesMember star:HealthcareProvidersServicesPreferredEquitySecuritiesMember
Principal, Shares, Units $ 629,728 $ 629,728
Amortized cost 2,618,164 2,618,164 [1]
Fair value $ 3,373,239 $ 3,168,575 [2]
Percentage of net assets 1.80% 1.70%
Investment, Identifier [Axis]: Healthcare Providers & Services Warrants and Other Equity Securities    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:HealthcareProvidersServicesWarrantsAndOtherEquitySecuritiesMember star:HealthcareProvidersServicesWarrantsAndOtherEquitySecuritiesMember
Principal, Shares, Units $ 1,185 $ 1,185
Amortized cost 419,877 419,877 [1]
Fair value $ 326,283 $ 428,568 [2]
Percentage of net assets 0.20% 0.20%
Investment, Identifier [Axis]: Hometown Holdings JV, LLC (dba BWG Strategy) Preferred Equity Securities    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[13],[14] star:HometownHoldingsJVLLCDbaBWGStrategyPreferredEquitySecuritiesMember [16] star:HometownHoldingsJVLLCDbaBWGStrategyPreferredEquitySecuritiesMember [20]
Investment, Significant Unobservable Input [true false] [13],[14] true true
Basis spread on variable rate [13],[14] 0.00% 0.00% [11]
Interest Rate [13],[14] 0.00%  
PIK Interest Rate [13],[14]   8.00%
Acquisition date [13],[14] Dec. 24, 2020 Dec. 24, 2020
Principal, Shares, Units [13],[14] $ 666,667 $ 666,667
Amortized cost [13],[14] 659,761 676,799 [1]
Fair value [13],[14] $ 829,000 $ 820,533 [2]
Percentage of net assets [13],[14] 0.40% 0.40%
Investment, Identifier [Axis]: Hotels, Restaurants & Leisure First Lien Senior Secured Term Loan    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:HotelsRestaurantsLeisureFirstLienSeniorSecuredTermLoanMember star:HotelsRestaurantsLeisureFirstLienSeniorSecuredTermLoanMember
Principal, Shares, Units $ 4,966,387 $ 4,978,992
Amortized cost 4,835,585 4,839,259 [1]
Fair value $ 4,876,992 $ 4,876,922 [2]
Percentage of net assets 2.60% 2.60%
Investment, Identifier [Axis]: Hotels, Restaurants & Leisure Warrants and Other Equity Securities    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:HotelsRestaurantsLeisureWarrantsAndOtherEquitySecuritiesMember star:HotelsRestaurantsLeisureWarrantsAndOtherEquitySecuritiesMember
Principal, Shares, Units $ 21,210 $ 21,210
Amortized cost 71,599 71,599 [1]
Fair value $ 56,136 $ 32,606 [2]
Percentage of net assets 0.00% 0.00%
Investment, Identifier [Axis]: Household Durables First Lien Senior Secured Term Loan    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:HouseholdDurablesFirstLienSeniorSecuredTermLoanMember star:HouseholdDurablesFirstLienSeniorSecuredTermLoanMember
Principal, Shares, Units $ 4,683,036 $ 4,683,036
Amortized cost 4,618,637 4,618,637 [1]
Fair value $ 2,341,518 $ 2,341,518 [2]
Percentage of net assets 1.20% 1.20%
Investment, Identifier [Axis]: Household Durables Warrants and Other Equity Securities    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:HouseholdDurablesWarrantsAndOtherEquitySecuritiesMember star:HouseholdDurablesWarrantsAndOtherEquitySecuritiesMember
Principal, Shares, Units $ 1,846,180 $ 1,846,180
Amortized cost 0 0 [1]
Fair value $ 0 $ 0 [2]
Percentage of net assets 0.00% 0.00%
Investment, Identifier [Axis]: Household Products First Lien Senior Secured Term Loan    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:HouseholdProductsFirstLienSeniorSecuredTermLoanMember star:HouseholdProductsFirstLienSeniorSecuredTermLoanMember
Principal, Shares, Units $ 4,387,729 $ 4,387,729
Amortized cost 4,341,201 4,335,754 [1]
Fair value $ 4,387,729 $ 4,365,790 [2]
Percentage of net assets 2.30% 2.30%
Investment, Identifier [Axis]: Household Products Warrants and Other Equity Securities    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:HouseholdProductsWarrantsAndOtherEquitySecuritiesMember star:HouseholdProductsWarrantsAndOtherEquitySecuritiesMember
Principal, Shares, Units $ 535,714 $ 535,714
Amortized cost 535,714 535,714 [1]
Fair value $ 358,571 $ 99,286 [2]
Percentage of net assets 0.20% 0.10%
Investment, Identifier [Axis]: IPA Intermediate Co., LLC (dba Integrated Pain Associates) First Lien Senior Secured Term Loan SOFR Spread 8.01% Interest Rate 13.31% Due 1/9/2028    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[17] star:IPAIntermediateCoLLCDbaIntegratedPainAssociatesFirstLienSeniorSecuredTermLoanSOFRSpread801InterestRate1331Due192028Member  
Investment, Significant Unobservable Input [true false] [17] true  
Basis spread on variable rate [17] 8.01%  
Interest Rate [17] 13.31%  
Acquisition date [17] Jan. 09, 2023  
Maturity date [17] Jan. 09, 2028  
Principal, Shares, Units [17] $ 11,181,005  
Amortized cost [17] 10,903,318  
Fair value [17] $ 10,782,962  
Percentage of net assets [17] 5.60%  
Investment, Identifier [Axis]: IPA Intermediate Co., LLC (dba Integrated Pain Associates)First Lien Senior Secured Term Loan SOFR Spread 8.01% Interest Rate 13.34% Due 1/9/2028    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[18]   star:IPAIntermediateCoLLCDbaIntegratedPainAssociatesFirstLienSeniorSecuredTermLoanSOFRSpread801InterestRate1334Due192028Member
Investment, Significant Unobservable Input [true false] [18]   true
Basis spread on variable rate [11],[18]   8.01%
Interest Rate [18]   13.34%
Acquisition date [18]   Jan. 09, 2023
Maturity date [18]   Jan. 09, 2028
Principal, Shares, Units [18]   $ 11,209,312
Amortized cost [1],[18]   10,930,921
Fair value [2],[18]   $ 10,930,921
Percentage of net assets [18]   5.70%
Investment, Identifier [Axis]: IPA Investors, LP (dba Integrated Pain Associates) Preferred Equity Securities Interest Rate 8.00% PIK    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[14] star:IPAInvestorsLPDbaIntegratedPainAssociatesPreferredEquitySecuritiesInterestRate800PIKMember star:IPAInvestorsLPDbaIntegratedPainAssociatesPreferredEquitySecuritiesInterestRate800PIKMember
Investment, Significant Unobservable Input [true false] [14] true true
Basis spread on variable rate [14] 0.00% 0.00% [11]
PIK Interest Rate [14] 8.00% 8.00%
Acquisition date [14] Jan. 09, 2023 Jan. 09, 2023
Principal, Shares, Units [14] $ 2,643 $ 2,643
Amortized cost [14] 1,997,838 1,997,838 [1]
Fair value [14] $ 3,075,331 $ 2,854,468 [2]
Percentage of net assets [14] 1.60% 1.50%
Investment, Identifier [Axis]: IT Services First Lien Senior Secured Term Loan    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:ITServicesFirstLienSeniorSecuredTermLoanMember star:ITServicesFirstLienSeniorSecuredTermLoanMember
Principal, Shares, Units $ 13,137,091 $ 18,687,526
Amortized cost 12,972,100 18,368,354 [1]
Fair value $ 13,152,856 $ 18,406,891 [2]
Percentage of net assets 6.90% 9.60%
Investment, Identifier [Axis]: Investments First Lien Senior Secured Term Loan    
Investments [Abstract]    
Investment, Type [Extensible Enumeration] [3],[4],[5],[6],[8],[9] Investments First Lien Senior Secured Term Loan [Member] Investments First Lien Senior Secured Term Loan [Member]
Amortized cost $ 311,129,060 $ 332,292,188 [1]
Fair value $ 294,455,581 $ 319,229,009 [2]
Percentage of net assets 153.90% 167.20%
Investment, Identifier [Axis]: Investments Second Lien Senior Secured Loan    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:InvestmentsSecondLienSeniorSecuredLoanMember  
Investment, Type [Extensible Enumeration] [3],[4],[5],[6],[8],[9]   star:InvestmentsSecondLienSeniorSecuredLoanMember
Amortized cost $ 6,248,112 $ 6,305,249 [1]
Fair value $ 6,067,024 $ 6,059,372 [2]
Percentage of net assets 3.20% 3.20%
Investment, Identifier [Axis]: Japonesque, LLC First Lien Senior Secured Term Loan SOFR Spread 8.18% Interest Rate 13.48% Due 11/23/2026    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[17],[22] star:JaponesqueLLCFirstLienSeniorSecuredTermLoanSOFRSpread818InterestRate1348Due11232026Member  
Investment, Significant Unobservable Input [true false] [17],[22] true  
Basis spread on variable rate [17],[22] 8.18%  
Interest Rate [17],[22] 13.48%  
Acquisition date [17],[22] Nov. 23, 2021  
Maturity date [17],[22] Nov. 23, 2026  
Principal, Shares, Units [17],[22] $ 4,494,834  
Amortized cost [17],[22] 4,442,180  
Fair value [17],[22] $ 4,539,782  
Percentage of net assets [17],[22] 2.40%  
Investment, Identifier [Axis]: Japonesque, LLC First Lien Senior Secured Term Loan SOFR Spread 8.18% Plus 1.50 % PIK Interest Rate 13.51 Plus 1.50% Due 11/23/2026    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[12],[18],[22]   star:JaponesqueLLCFirstLienSeniorSecuredTermLoanLIBORSpreadS818Cash150PIKInterestRate1351CashPlus150PIKDue11232026Member
Investment, Significant Unobservable Input [true false] [18],[22]   true
Basis spread on variable rate [11],[18],[22]   8.18%
Paid in Kind Basis Spread Variable Rate [11],[18],[22]   1.50%
Interest Rate [18],[22]   13.51%
PIK Interest Rate [18],[22]   1.50%
Acquisition date [18],[22]   Nov. 23, 2021
Maturity date [18],[22]   Nov. 23, 2026
Principal, Shares, Units [18],[22]   $ 4,525,012
Amortized cost [1],[18],[22]   4,451,581
Fair value [2],[18],[22]   $ 4,457,979
Percentage of net assets [18],[22]   2.30%
Investment, Identifier [Axis]: Klein Hersh, LLC First Lien Senior Secured Term Loan SOFR Spread 7.76% Plus 3.00% PIK Interest Rate 4.63% Plus 11.43% PIK Due 4/27/2027    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[22] star:KleinHershLLCFirstLienSeniorSecuredTermLoanSOFRSpread776Plus300PIKInterestRate463Plus1143PIKDue4272027Member [17] star:KleinHershLLCFirstLienSeniorSecuredTermLoanSOFRSpread1076InterestRate463Plus1105PIKDue4272027Member [12],[18]
Investment, Significant Unobservable Input [true false] [22] true [17] true [18]
Basis spread on variable rate [22] 7.76% [17] 7.76% [11],[18]
Paid in Kind Basis Spread Variable Rate [17],[22] 3.00%  
Interest Rate [22] 4.63% [17] 4.63% [18]
PIK Interest Rate [22] 11.43% [17] 8.47% [18]
Acquisition date [22] Apr. 27, 2022 [17] Apr. 27, 2022 [18]
Maturity date [22] Apr. 27, 2027 [17] Apr. 27, 2027 [18]
Principal, Shares, Units [22] $ 16,946,657 [17] $ 16,438,829 [18]
Amortized cost [22] 16,332,009 [17] 15,808,872 [1],[18]
Fair value [22] $ 14,626,660 [17] $ 14,188,353 [2],[18]
Percentage of net assets [22] 7.70% [17] 7.40% [18]
Investment, Identifier [Axis]: Klein Hersh, LLC Warrants and Other Equity Securities    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:KleinHershLLCWarrantsAndOtherEquitySecuritiesMember star:KleinHershLLCWarrantsAndOtherEquitySecuritiesMember [19]
Investment, Significant Unobservable Input [true false] true true
Basis spread on variable rate 0.00% 0.00% [11]
Interest Rate   0.00%
Acquisition date Apr. 27, 2022 Apr. 27, 2022
Principal, Shares, Units $ 1,003 $ 1,003
Amortized cost 0 0 [1]
Fair value $ 0 $ 0 [2]
Percentage of net assets 0.00% 0.00%
Investment, Identifier [Axis]: LRI Holdco, LLC (dba Linden Labs) Warrants and Other Equity Securities    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[14] star:LRIHoldcoLLCDbaLindenLabsWarrantsAndOtherEquitySecuritiesMember star:LRIHoldcoLLCDbaLindenLabsWarrantsAndOtherEquitySecuritiesMember
Investment, Significant Unobservable Input [true false] [14] true true
Basis spread on variable rate [14] 0.00% 0.00% [11]
Interest Rate [14]   0.00%
Acquisition date [14] Dec. 31, 2020 Dec. 31, 2020
Principal, Shares, Units [14] $ 2 $ 2
Amortized cost [14] 43,478 43,478 [1]
Fair value [14] $ 502,800 $ 528,569 [2]
Percentage of net assets [14] 0.30% 0.30%
Investment, Identifier [Axis]: Lasalle Staffing, LLC First Lien Senior Secured Term Loan SOFR Spread 6.86% Interest Rate 12.19% Due 2/15/2027    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[7],[8],[9],[22] star:LasalleStaffingLLCFirstLienSeniorSecuredTermLoanSOFRSpread686InterestRate1219Due2152027Member  
Investment, Significant Unobservable Input [true false] [7],[22] true  
Basis spread on variable rate [7],[22] 6.86%  
Interest Rate [7],[22] 12.19%  
Acquisition date [7],[22] Feb. 15, 2022  
Maturity date [7],[22] Feb. 15, 2027  
Principal, Shares, Units [7],[22] $ 7,436,888  
Amortized cost [7],[22] 7,307,504  
Fair value [7],[22] $ 7,474,073  
Percentage of net assets [7],[22] 3.90%  
Investment, Identifier [Axis]: Lasalle Staffing, LLC First Lien Senior Secured Term Loan SOFR Spread 6.86% Interest Rate 12.21% Due 2/15/2027    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[10],[12],[22]   star:LasalleStaffingLLCFirstLienSeniorSecuredTermLoanSOFRSpread686InterestRate1221Due2152022Member
Investment, Significant Unobservable Input [true false] [10],[22]   true
Basis spread on variable rate [10],[11],[22]   6.86%
Interest Rate [10],[22]   12.21%
Acquisition date [10],[22]   Feb. 15, 2022
Maturity date [10],[22]   Feb. 15, 2027
Principal, Shares, Units [10],[22]   $ 7,461,888
Amortized cost [1],[10],[22]   7,332,377
Fair value [2],[10],[22]   $ 7,499,198
Percentage of net assets [10],[22]   3.90%
Investment, Identifier [Axis]: Leisure Products First Lien Senior Secured Term Loan    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:LeisureProductsFirstLienSeniorSecuredTermLoanMember star:LeisureProductsFirstLienSeniorSecuredTermLoanMember
Principal, Shares, Units $ 4,257,153 $ 4,226,371
Amortized cost 4,193,998 4,163,215 [1]
Fair value $ 2,342,286 $ 3,852,760 [2]
Percentage of net assets 1.20% 2.00%
Investment, Identifier [Axis]: Leisure Products Preferred Equity Securities    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:LeisureProductsPreferredEquitySecuritiesMember star:LeisureProductsPreferredEquitySecuritiesMember
Principal, Shares, Units $ 13 $ 13
Amortized cost 564,645 564,645 [1]
Fair value $ 0 $ 0 [2]
Percentage of net assets 0.00% 0.00%
Investment, Identifier [Axis]: Linden Research, Inc. (dba Linden Labs) First Lien Senior Secured Term Loan SOFR Spread 7.26% Plus 3.25% PIK Interest Rate 12.56% Plus 3.25 PIK Due 12/31/2025    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[22] star:LindenResearchIncDbaLindenLabsFirstLienSeniorSecuredTermLoanSOFRSpread726Plus325PIKInterestRate1256Plus325PIKDue12312025Member [17] star:LindenResearchIncDbaLindenLabsFirstLienSeniorSecuredTermLoanLIBORSpread850Plus161PIKInterestRate1519Plus161PIKDue12312025Member [12],[18]
Investment, Significant Unobservable Input [true false] [22] true [17] true [18]
Basis spread on variable rate [22] 7.26% [17] 7.26% [11],[18]
Paid in Kind Basis Spread Variable Rate [22] 3.25% [17] 3.25% [11],[18]
Interest Rate [22] 12.56% [17] 12.59% [18]
PIK Interest Rate [22] 3.25% [17] 3.25% [18]
Acquisition date [22] Dec. 31, 2020 [17] Dec. 31, 2020 [18]
Maturity date [22] Dec. 31, 2025 [17] Dec. 31, 2025 [18]
Principal, Shares, Units [22] $ 4,761,561 [17] $ 4,738,655 [18]
Amortized cost [22] 4,656,225 [17] 4,634,407 [1],[18]
Fair value [22] $ 4,761,561 [17] $ 4,738,655 [2],[18]
Percentage of net assets [22] 2.50% [17] 2.50% [18]
Investment, Identifier [Axis]: Lockstep Holdings, LLC First Lien Senior Secured Term Loan LIBOR Spread 6.75% Interest Rate 12.08% Due 7/3/2028    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[18],[22]   star:LockstepHoldingsLLCFirstLienSeniorSecuredTermLoanLIBORSpread675InterestRate1208Due732028Member
Investment, Significant Unobservable Input [true false] [18],[22]   true
Basis spread on variable rate [11],[18],[22]   6.75%
Interest Rate [18],[22]   12.08%
Acquisition date [18],[22]   Jul. 03, 2023
Maturity date [18],[22]   Jul. 03, 2028
Principal, Shares, Units [18],[22]   $ 5,357,714
Amortized cost [1],[18],[22]   5,228,599
Fair value [2],[18],[22]   $ 5,210,377
Percentage of net assets [18],[22]   2.70%
Investment, Identifier [Axis]: MPUSA, LLC (dba Mission) First Lien Senior Secured Term Loan SOFR Spread 11.26% Interest Rate 13.59% Plus 3.00% PIK Due 12/9/2026    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[18]   star:MPUSALLCDbaMissionFirstLienSeniorSecuredTermLoanLIBORSpread900InterestRate1419Due1292026Member
Investment, Significant Unobservable Input [true false] [18]   true
Basis spread on variable rate [11],[18]   11.26%
Interest Rate [18]   13.59%
PIK Interest Rate [18]   3.00%
Acquisition date [18]   Dec. 09, 2021
Maturity date [18]   Dec. 09, 2026
Principal, Shares, Units [18]   $ 4,226,371
Amortized cost [1],[18]   4,163,215
Fair value [2],[18]   $ 3,852,760
Percentage of net assets [18]   2.00%
Investment, Identifier [Axis]: MPUSA, LLC (dba Mission) First Lien Senior Secured Term Loan SOFR Spread 8.26% Plus 3.00% PIK Interest Rate 13.56% Plus 3.00% PIK Due 12/9/2026    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[17] star:MPUSALLCDbaMissionFirstLienSeniorSecuredTermLoanSOFRSpread826Plus300PIKInterestRate1356Plus300PIKDue1292026Member  
Investment, Significant Unobservable Input [true false] [17] true  
Basis spread on variable rate [17] 8.26%  
Paid in Kind Basis Spread Variable Rate [17] 3.00%  
Interest Rate [17] 13.56%  
PIK Interest Rate [17] 3.00%  
Acquisition date [17] Dec. 09, 2021  
Maturity date [17] Dec. 09, 2026  
Principal, Shares, Units [17] $ 4,257,153  
Amortized cost [17] 4,193,998  
Fair value [17] $ 2,342,286  
Percentage of net assets [17] 1.20%  
Investment, Identifier [Axis]: MPUSA, LLC (dba Mission) Preferred Equity Securities    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[14] star:MPUSALLCDbaMissionPreferredEquitySecuritiesMember star:MPUSALLCDbaMissionPreferredEquitySecuritiesMember
Investment, Significant Unobservable Input [true false] [14] true true
Basis spread on variable rate [14] 0.00% 0.00% [11]
Interest Rate [14] 0.00% 0.00%
Acquisition date [14] Dec. 09, 2021 Dec. 09, 2021
Principal, Shares, Units [14] $ 13 $ 13
Amortized cost [14] 564,645 564,645 [1]
Fair value [14] $ 0 $ 0 [2]
Percentage of net assets [14] 0.00% 0.00%
Investment, Identifier [Axis]: Machinery First Lien Senior Secured Term Loan    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:MachineryFirstLienSeniorSecuredTermLoanMember star:MachineryFirstLienSeniorSecuredTermLoanMember
Principal, Shares, Units $ 4,833,807 $ 4,909,896
Amortized cost 4,763,104 4,832,798 [1]
Fair value $ 4,173,509 $ 4,196,979 [2]
Percentage of net assets 2.20% 2.20%
Investment, Identifier [Axis]: Machinery Warrants and Other Equity Securities    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:MachineryWarrantsAndOtherEquitySecuritiesMember star:MachineryWarrantsAndOtherEquitySecuritiesMember
Principal, Shares, Units $ 1,602 $ 1,602
Amortized cost 0 0 [1]
Fair value $ 262,258 $ 490,323 [2]
Percentage of net assets 0.10% 0.30%
Investment, Identifier [Axis]: Madryn Select Opportunities, LP Fund Investments    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:MadrynSelectOpportunitiesLPFundInvestmentsMember [23] star:MadrynSelectOpportunitiesLPFundInvestmentsMember [19]
Investment, Significant Unobservable Input [true false] true [23] true [19]
Basis spread on variable rate 0.00% [23] 0.00% [11],[19]
Interest Rate [19],[23]   0.00%
Acquisition date Jan. 04, 2022 [23] Jan. 04, 2022 [19]
Principal, Shares, Units $ 2,855,855 [23] $ 2,898,305 [19]
Amortized cost 2,898,305 [23] 2,898,305 [1],[19]
Fair value $ 2,818,111 [23] $ 2,809,327 [2],[19]
Percentage of net assets 1.50% [23] 1.50% [19]
Investment, Identifier [Axis]: Masterwork Electronics, Inc. First Lien Senior Secured Term Loan SOFR Spread 9.50% Interest Rate 14.83% PIK Due 11/17/2027    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[18]   star:MasterworkElectronicsIncFirstLienSeniorSecuredTermLoanSOFRSpread950InterestRate1483PIKDue11172027Member
Investment, Significant Unobservable Input [true false] [18]   true
Basis spread on variable rate [11],[18]   9.50%
PIK Interest Rate [18]   14.83%
Acquisition date [18]   Nov. 17, 2022
Maturity date [18]   Nov. 17, 2027
Principal, Shares, Units [18]   $ 8,521,445
Amortized cost [1],[18]   8,357,466
Fair value [2],[18]   $ 6,935,604
Percentage of net assets [18]   3.60%
Investment, Identifier [Axis]: Masterwork Electronics, Inc. First Lien Senior Secured Term Loan SOFR Spread 9.65% Interest Rate 14.95% PIK Due 11/17/2027    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[17],[25] star:MasterworkElectronicsIncFirstLienSeniorSecuredTermLoanSOFRSpread965InterestRate1495PIKDue11172027Member  
Investment, Significant Unobservable Input [true false] [17],[25] true  
Basis spread on variable rate [17],[25] 9.65%  
Interest Rate [17],[25] 14.95%  
Acquisition date [17],[25] Nov. 17, 2022  
Maturity date [17],[25] Nov. 17, 2027  
Principal, Shares, Units [17],[25] $ 8,840,576  
Amortized cost [17],[25] 8,676,598  
Fair value [17],[25] $ 7,029,142  
Percentage of net assets [17],[25] 3.70%  
Investment, Identifier [Axis]: MechanAir Holdings, LLC Preferred Equity Securities Interest Rate 13.50% PIK    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[13],[14],[16] star:MechanAirHoldingsLLCPreferredEquitySecuritiesInterestRate1350PIKMember star:MechanAirHoldingsLLCPreferredEquitySecuritiesInterestRate1350PIKMember [20]
Investment, Significant Unobservable Input [true false] [13],[14],[16] true true
Basis spread on variable rate [13],[14],[16] 0.00% 0.00% [11]
PIK Interest Rate [13],[14],[16] 13.50% 13.50%
Acquisition date [13],[14],[16] Sep. 02, 2021 Sep. 02, 2021
Principal, Shares, Units [13],[14],[16] $ 1,219 $ 1,219
Amortized cost [13],[14],[16] 1,219,441 1,219,441 [1]
Fair value [13],[14],[16] $ 32,857 $ 0 [2]
Percentage of net assets [13],[14],[16] 0.00% 0.00%
Investment, Identifier [Axis]: MechanAir, LLC First Lien Senior Secured Term Loan Interest Rate 18.00% PIK Due 9/2/2026    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[13] star:MechanAirLLCFirstLienSeniorSecuredTermLoanInterestRate1800PIKDue922026Member  
Investment, Significant Unobservable Input [true false] [13] true  
Basis spread on variable rate [13] 0.00%  
PIK Interest Rate [13] 18.00%  
Acquisition date [13] Dec. 15, 2023  
Maturity date [13] Sep. 02, 2026  
Principal, Shares, Units [13] $ 445,274  
Amortized cost [13] 445,274  
Fair value [13] $ 445,274  
Percentage of net assets [13] 0.20%  
Investment, Identifier [Axis]: MechanAir, LLC First Lien Senior Secured Term Loan SOFR Spread 10.80% Interest Rate 11.27% Plus 4.83% PIK Due 9/2/2026    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[17] star:MechanAirLLCFirstLienSeniorSecuredTermLoanSOFRSpread1080InterestRate1127Plus483PIKDue922026Member  
Investment, Significant Unobservable Input [true false] [17] true  
Basis spread on variable rate [17] 10.80%  
Interest Rate [17] 11.27%  
PIK Interest Rate [17] 4.83%  
Acquisition date [17] Sep. 02, 2021  
Maturity date [17] Sep. 02, 2026  
Principal, Shares, Units [17] $ 11,039,824  
Amortized cost [17] 10,894,051  
Fair value [17] $ 10,716,044  
Percentage of net assets [17] 5.60%  
Investment, Identifier [Axis]: MechanAir, LLC First Lien Senior Secured Term Loan SOFR Spread 10.80% Interest Rate 11.29% Plus 4.84% PIK Due 9/2/2026    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[18]   star:MechanAirLLCFirstLienSeniorSecuredTermLoanLIBORSpread1050InterestRate1569Due922026Member
Investment, Significant Unobservable Input [true false] [18]   true
Basis spread on variable rate [11],[18]   10.80%
Interest Rate [18]   11.29%
PIK Interest Rate [18]   4.84%
Acquisition date [18]   Sep. 02, 2021
Maturity date [18]   Sep. 02, 2026
Principal, Shares, Units [18]   $ 11,006,971
Amortized cost [1],[18]   10,846,083
Fair value [2],[18]   $ 10,616,224
Percentage of net assets [18]   5.60%
Investment, Identifier [Axis]: MechanAir, LLC First Lien Senior Secured Term Loan SOFR Spread 12.30% 17.63% PIK Due 9/2/2026    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[18]   star:MechanAirLLCFirstLienSeniorSecuredTermLoanSOFRSpread12301763PIKDue922026Member
Investment, Significant Unobservable Input [true false] [18]   true
Basis spread on variable rate [11],[18]   12.30%
PIK Interest Rate [18]   17.63%
Acquisition date [18]   Dec. 15, 2023
Maturity date [18]   Sep. 02, 2026
Principal, Shares, Units [18]   $ 710,054
Amortized cost [1],[18]   710,054
Fair value [2],[18]   $ 0
Percentage of net assets [18]   0.00%
Investment, Identifier [Axis]: MechanAir, LLC First Lien Senior Secured Term Loan SOFR Spread 12.30% 18.00% PIK Due 9/2/2026    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[13]   star:MechanAirLLCFirstLienSeniorSecuredTermLoanInterestRate1800PIKDue922026Member
Investment, Significant Unobservable Input [true false] [13]   true
Basis spread on variable rate [11],[13]   0.00%
PIK Interest Rate [13]   18.00%
Acquisition date [13]   Dec. 15, 2023
Maturity date [13]   Sep. 02, 2026
Principal, Shares, Units [13]   $ 426,099
Amortized cost [1],[13]   426,099
Fair value [2],[13]   $ 0
Percentage of net assets [13]   0.00%
Investment, Identifier [Axis]: MechanAir, LLC First Lien Senior Secured Term Loan SOFR Spread 12.30% Interest Rate 17.60% PIK Due 9/2/2026    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[17] star:MechanAirLLCFirstLienSeniorSecuredTermLoanSOFRSpread1230InterestRate1760PIKDue922026Member  
Investment, Significant Unobservable Input [true false] [17] true  
Basis spread on variable rate [17] 12.30%  
PIK Interest Rate [17] 17.60%  
Acquisition date [17] Dec. 15, 2023  
Maturity date [17] Sep. 02, 2026  
Principal, Shares, Units [17] $ 741,447  
Amortized cost [17] 741,447  
Fair value [17] $ 729,880  
Percentage of net assets [17] 0.40%  
Investment, Identifier [Axis]: Media First Lien Senior Secured Term Loan    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:MediaFirstLienSeniorSecuredTermLoanMember star:MediaFirstLienSeniorSecuredTermLoanMember
Principal, Shares, Units $ 19,034,880 $ 19,022,302
Amortized cost 18,750,446 18,733,268 [1]
Fair value $ 18,966,826 $ 18,700,248 [2]
Percentage of net assets 9.90% 9.90%
Investment, Identifier [Axis]: Media Preferred Equity Securities    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:MediaPreferredEquitySecuritiesMember star:MediaPreferredEquitySecuritiesMember
Principal, Shares, Units $ 3,515,344 $ 3,515,344
Amortized cost 4,847,503 4,847,503 [1]
Fair value $ 7,577,151 $ 7,170,030 [2]
Percentage of net assets 4.10% 3.90%
Investment, Identifier [Axis]: Microf, LLC First Lien Senior Secured Term Loan SOFR Spread 10.85% Interest Rate 16.15% Due 6/30/2025    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:MicrofLLCFirstLienSeniorSecuredTermLoanSOFRSpread1085InterestRate1615Due6302025Member [17] star:MicrofLLCFirstLienSeniorSecuredTermLoanLIBORSpread1075InterestRate1594Due6302025Member [18]
Investment, Significant Unobservable Input [true false] true [17] true [18]
Basis spread on variable rate 10.85% [17] 10.85% [11],[18]
Interest Rate 16.15% [17] 16.18% [18]
Acquisition date Mar. 29, 2019 [17] Mar. 29, 2019 [18]
Maturity date Jun. 30, 2025 [17] Jun. 30, 2025 [18]
Principal, Shares, Units $ 3,427,073 [17] $ 3,427,073 [18]
Amortized cost 3,418,199 [17] 3,407,754 [1],[18]
Fair value $ 3,427,073 [17] $ 3,427,073 [2],[18]
Percentage of net assets 1.80% [17] 1.80% [18]
Investment, Identifier [Axis]: Microf, LLC Warrants and Other Equity Securities    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:MicrofLLCWarrantsAndOtherEquitySecuritiesMember star:MicrofLLCWarrantsAndOtherEquitySecuritiesMember
Investment, Significant Unobservable Input [true false] true true
Basis spread on variable rate 0.00% 0.00% [11]
Interest Rate   0.00%
Acquisition date May 05, 2020 May 05, 2020
Principal, Shares, Units $ 164,332 $ 164,332
Amortized cost 0 0 [1]
Fair value $ 318,483 $ 190,807 [2]
Percentage of net assets 0.20% 0.10%
Investment, Identifier [Axis]: NSC Holdings, LLC Warrants and Other Equity Securities    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[14] star:NSCHoldingsLLCWarrantsAndOtherEquitySecuritiesMember star:NSCHoldingsLLCWarrantsAndOtherEquitySecuritiesMember
Investment, Significant Unobservable Input [true false] [14] true true
Basis spread on variable rate [14] 0.00% 0.00% [11]
Interest Rate [14]   0.00%
Acquisition date [14] Apr. 26, 2019 Apr. 26, 2019
Principal, Shares, Units [14] $ 111 $ 111
Amortized cost [14] 271,262 271,262 [1]
Fair value [14] $ 487,222 $ 296,715 [2]
Percentage of net assets [14] 0.30% 0.20%
Investment, Identifier [Axis]: NSC Technologies, LLC First Lien Senior Secured Term Loan LIBOR Spread 7.76% Interest Rate 13.09% Due 10/26/2026    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[18]   star:NSCTechnologiesLLCFirstLienSeniorSecuredTermLoanLIBORSpread850InterestRate1369Due4262024Member
Investment, Significant Unobservable Input [true false] [18]   true
Basis spread on variable rate [11],[18]   7.76%
Interest Rate [18]   13.09%
Acquisition date [18]   Apr. 26, 2019
Maturity date [18]   Oct. 26, 2026
Principal, Shares, Units [18]   $ 4,148,472
Amortized cost [1],[18]   4,139,598
Fair value [2],[18]   $ 4,148,472
Percentage of net assets [18]   2.20%
Investment, Identifier [Axis]: NSC Technologies, LLC First Lien Senior Secured Term Loan SOFR Spread 7.76% Interest Rate 13.06% Due 10/26/2026    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[17] star:NSCTechnologiesLLCFirstLienSeniorSecuredTermLoanSOFRSpread776InterestRate1306Due10262026Member  
Investment, Significant Unobservable Input [true false] [17] true  
Basis spread on variable rate [17] 7.76%  
Interest Rate [17] 13.06%  
Acquisition date [17] Apr. 26, 2019  
Maturity date [17] Oct. 26, 2026  
Principal, Shares, Units [17] $ 4,148,472  
Amortized cost [17] 4,146,579  
Fair value [17] $ 4,148,472  
Percentage of net assets [17] 2.20%  
Investment, Identifier [Axis]: NW Entertainment, LLC First Lien Senior Secured Term Loan SOFR Spread 7.76% Interest Rate 13.06% Due 11/4/2027    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:NWEntertainmentLLCFirstLienSeniorSecuredTermLoanSOFRSpread776InterestRate1306Due1142027Member [17] star:NWEntertainmentLLCFirstLienSeniorSecuredTermLoanSOFRSpread776InterestRate1267Due1142027Member [18]
Investment, Significant Unobservable Input [true false] true [17] true [18]
Basis spread on variable rate 7.76% [17] 7.76% [11],[18]
Interest Rate 13.06% [17] 13.09% [18]
Acquisition date Nov. 04, 2022 [17] Nov. 04, 2022 [18]
Maturity date Nov. 04, 2027 [17] Nov. 04, 2027 [18]
Principal, Shares, Units $ 6,333,713 [17] $ 6,366,361 [18]
Amortized cost 6,222,873 [17] 6,254,950 [1],[18]
Fair value $ 6,460,387 [17] $ 6,366,361 [2],[18]
Percentage of net assets 3.40% [17] 3.30% [18]
Investment, Identifier [Axis]: NW Entertainment, LLC Preferred Equity Securities Interest Rate 10.00% PIK    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[14],[16] star:NWEntertainmentLLCPreferredEquitySecuritiesInterestRate1000PIKMember star:NWEntertainmentLLCPreferredEquitySecuritiesInterestRate1000PIKMember
Investment, Significant Unobservable Input [true false] [14],[16] true true
Basis spread on variable rate [14],[16] 0.00% 0.00% [11]
PIK Interest Rate [14],[16] 10.00% 10.00%
Acquisition date [14],[16] Nov. 04, 2022 Nov. 04, 2022
Principal, Shares, Units [14],[16] $ 971 $ 971
Amortized cost [14],[16] 955,843 955,843 [1]
Fair value [14],[16] $ 1,115,446 $ 1,088,481 [2]
Percentage of net assets [14],[16] 0.60% 0.60%
Investment, Identifier [Axis]: Nurses 24/7 Holdings, LLC Warrants and Other Equity Securities    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[14] star:Nurses247HoldingsLLCWarrantsAndOtherEquitySecuritiesMember star:Nurses247HoldingsLLCWarrantsAndOtherEquitySecuritiesMember
Investment, Significant Unobservable Input [true false] [14] true true
Basis spread on variable rate [14] 0.00% 0.00% [11]
Interest Rate [14]   0.00%
Acquisition date [14] May 26, 2023 May 26, 2023
Principal, Shares, Units [14] $ 182 $ 182
Amortized cost [14] 419,877 419,877 [1]
Fair value [14] $ 326,283 $ 428,568 [2]
Percentage of net assets [14] 0.20% 0.20%
Investment, Identifier [Axis]: Nurses Staffing, LLC (dba Nurses 24/7) First Lien Senior Secured Term Loan SOFR Spread 7.26% Cash Plus 2.00% PIK Interest Rate 12.59% Cash Plus 2.00% PIK Due 8/26/2028    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[18]   star:NursesStaffingLLCDbaNurses247FirstLienSeniorSecuredTermLoanSOFRSpread726CashPlus200PIKInterestRate1259CashPlus200PIKDue8262028Member
Investment, Significant Unobservable Input [true false] [18]   true
Basis spread on variable rate [11],[18]   7.26%
Paid in Kind Basis Spread Variable Rate [11],[18]   2.00%
Interest Rate [18]   12.59%
PIK Interest Rate [18]   2.00%
Acquisition date [18]   May 26, 2023
Maturity date [18]   Aug. 26, 2028
Principal, Shares, Units [18]   $ 7,396,865
Amortized cost [1],[18]   7,251,132
Fair value [2],[18]   $ 7,258,544
Percentage of net assets [18]   3.80%
Investment, Identifier [Axis]: Nurses Staffing, LLC (dba Nurses 24/7) First Lien Senior Secured Term Loan SOFR Spread 7.26% Plus 2.00% PIK Interest Rate 12.56 Plus 2.00% PIK Due 8/26/2028    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[17] star:NursesStaffingLLCDbaNurses247FirstLienSeniorSecuredTermLoanSOFRSpread726Plus200PIKInterestRate1256Plus200PIKDue8262028Member  
Investment, Significant Unobservable Input [true false] [17] true  
Basis spread on variable rate [17] 7.26%  
Paid in Kind Basis Spread Variable Rate [17] 2.00%  
Interest Rate [17] 12.56%  
PIK Interest Rate [17] 2.00%  
Acquisition date [17] May 26, 2023  
Maturity date [17] Aug. 26, 2028  
Principal, Shares, Units [17] $ 7,112,946  
Amortized cost [17] 6,980,765  
Fair value [17] $ 6,937,256  
Percentage of net assets [17] 3.60%  
Investment, Identifier [Axis]: PPC Event Services, Inc. First Lien Senior Secured Term Loan SOFR Spread 6.76% Interest Rate 12.09% Due 9/22/2027    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[18],[19]   star:PPCEventServicesIncFirstLienSeniorSecuredTermLoanSOFRSpread651InterestRate1142Due9222027Member
Investment, Significant Unobservable Input [true false] [18],[19]   true
Basis spread on variable rate [11],[18],[19]   6.76%
Interest Rate [18],[19]   12.09%
Acquisition date [18],[19]   Sep. 22, 2022
Maturity date [18],[19]   Sep. 22, 2027
Principal, Shares, Units [18],[19]   $ 7,273,693
Amortized cost [1],[18],[19]   7,199,328
Fair value [2],[18],[19]   $ 7,273,693
Percentage of net assets [18],[19]   3.70%
Investment, Identifier [Axis]: PQT Ayaquhs, LLC (dba WWC Global) First Lien Senior Secured Term Loan SOFR Spread 7.76% Interest Rate 13.06% Due 8/1/2027    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[17] star:PQTAyaquhsLLCDbaWWCGlobalFirstLienSeniorSecuredTermLoanSOFRSpread776InterestRate1306Due812027Member  
Investment, Significant Unobservable Input [true false] [17] true  
Basis spread on variable rate [17] 7.76%  
Interest Rate [17] 13.06%  
Acquisition date [17] Aug. 01, 2022  
Maturity date [17] Aug. 01, 2027  
Principal, Shares, Units [17] $ 7,557,460  
Amortized cost [17] 7,438,558  
Fair value [17] $ 7,708,609  
Percentage of net assets [17] 4.00%  
Investment, Identifier [Axis]: PQT Ayaquhs, LLC (dba WWC Global) First Lien Senior Secured Term Loan SOFR Spread 7.76% Interest Rate 13.09% Due 8/1/2027    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[18]   star:PQTAyaquhsLLCDbaWWCGlobalFirstLienSeniorSecuredTermLoanSOFRSpread776InterestRate1309Due812027Member
Investment, Significant Unobservable Input [true false] [18]   true
Basis spread on variable rate [11],[18]   7.76%
Interest Rate [18]   13.09%
Acquisition date [18]   Aug. 01, 2022
Maturity date [18]   Aug. 01, 2027
Principal, Shares, Units [18]   $ 7,606,855
Amortized cost [1],[18]   7,481,063
Fair value [2],[18]   $ 7,606,855
Percentage of net assets [18]   4.00%
Investment, Identifier [Axis]: PQT Ayaquhs, LLC (dba WWC Global) Preferred Equity Securities Interest Rate 10.50% PIK    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[13],[14],[16] star:PQTAyaquhsLLCDbaWWCGlobalPreferredEquitySecuritiesInterestRate1050PIKMember star:PQTAyaquhsLLCDbaWWCGlobalPreferredEquitySecuritiesInterestRate1050PIKMember [20]
Investment, Significant Unobservable Input [true false] [13],[14],[16] true true
Basis spread on variable rate [13],[14],[16] 0.00% 0.00% [11]
Interest Rate [13],[14],[16]   10.50%
PIK Interest Rate [13],[14],[16] 10.50%  
Acquisition date [13],[14],[16] Aug. 01, 2022 Aug. 01, 2022
Principal, Shares, Units [13],[14],[16] $ 5,774 $ 5,774
Amortized cost [13],[14],[16] 1,064,516 1,064,516 [1]
Fair value [13],[14],[16] $ 3,439,677 $ 3,821,290 [2]
Percentage of net assets [13],[14],[16] 1.80% 2.00%
Investment, Identifier [Axis]: PQT Ayaquhs, LLC (dba WWC Global) Warrants and Other Equity Securities    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:PQTAyaquhsLLCDbaWWCGlobalWarrantsAndOtherEquitySecuritiesMember star:PQTAyaquhsLLCDbaWWCGlobalWarrantsAndOtherEquitySecuritiesMember
Investment, Significant Unobservable Input [true false] true true
Basis spread on variable rate 0.00% 0.00% [11]
Interest Rate   0.00%
Acquisition date Aug. 01, 2022 Aug. 01, 2022
Principal, Shares, Units $ 645 $ 645
Amortized cost 0 0 [1]
Fair value $ 266,129 $ 311,613 [2]
Percentage of net assets 0.10% 0.20%
Investment, Identifier [Axis]: PadSquad Holdings, LLC Preferred Equity Securities Interest Rate 6.00% Plus 6.00% PIK    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[13],[14],[16] star:PadSquadHoldingsLLCPreferredEquitySecuritiesInterestRate600Plus600PIKMember star:PadSquadHoldingsLLCDbaPadsquadPreferredEquitySecuritiesInterestRate600Plus600PIKMember [20]
Investment, Significant Unobservable Input [true false] [13],[14],[16] true true
Basis spread on variable rate [13],[14],[16] 0.00% 0.00% [11]
Interest Rate [13],[14],[16] 6.00% 6.00%
PIK Interest Rate [13],[14],[16] 6.00% 6.00%
Acquisition date [13],[14],[16] Mar. 30, 2022 Mar. 30, 2022
Principal, Shares, Units [13],[14],[16] $ 720,767 $ 720,767
Amortized cost [13],[14],[16] 1,964,204 1,964,204 [1]
Fair value [13],[14],[16] $ 2,239,463 $ 2,206,343 [2]
Percentage of net assets [13],[14],[16] 1.20% 1.20%
Investment, Identifier [Axis]: PadSquad, LLC First Lien Senior Secured Term Loan SOFR Spread 9.00% Interest Rate 14.30% Due 3/30/2027    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[17] star:PadSquadLLCFirstLienSeniorSecuredTermLoanSOFRSpread900InterestRate1430Due3302027Member  
Investment, Significant Unobservable Input [true false] [17] true  
Basis spread on variable rate [17] 9.00%  
Interest Rate [17] 14.30%  
Acquisition date [17] Mar. 30, 2022  
Maturity date [17] Mar. 30, 2027  
Principal, Shares, Units [17] $ 4,483,134  
Amortized cost [17] 4,424,616  
Fair value [17] $ 4,484,928  
Percentage of net assets [17] 2.30%  
Investment, Identifier [Axis]: PadSquad, LLC First Lien Senior Secured Term Loan SOFR Spread 9.00% Interest Rate 14.33% Due 3/30/2027    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[18]   star:PadSquadLLCFirstLienSeniorSecuredTermLoanSOFRSpread900InterestRate1433Due3302027Member
Investment, Significant Unobservable Input [true false] [18]   true
Basis spread on variable rate [11],[18]   9.00%
Interest Rate [18]   14.33%
Acquisition date [18]   Mar. 30, 2022
Maturity date [18]   Mar. 30, 2027
Principal, Shares, Units [18]   $ 4,549,341
Amortized cost [1],[18]   4,488,472
Fair value [2],[18]   $ 4,482,011
Percentage of net assets [18]   2.40%
Investment, Identifier [Axis]: Personal Products First Lien Senior Secured Term Loan    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:PersonalProductsFirstLienSeniorSecuredTermLoanMember star:PersonalProductsFirstLienSeniorSecuredTermLoanMember
Principal, Shares, Units $ 4,494,834 $ 4,525,012
Amortized cost 4,442,180 4,451,581 [1]
Fair value $ 4,539,782 $ 4,457,979 [2]
Percentage of net assets 2.40% 2.30%
Investment, Identifier [Axis]: Preferred equity securities    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[28],[30]   Preferred Equity Securities [Member]
Investment, Type [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[28],[30] Preferred Equity Securities [Member]  
Amortized cost $ 32,906,278 $ 31,684,552 [1]
Fair value $ 43,031,287 $ 41,804,395 [2]
Percentage of net assets 22.50% 22.20%
Investment, Identifier [Axis]: Proactive Dealer Holdings Parent, LLC Preferred Equity Securities Interest Rate 10.00% PIK    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[14] star:ProactiveDealerHoldingsParentLLCPreferredEquitySecuritiesInterestRate1000PIKMember star:ProactiveDealerHoldingsParentLLCPreferredEquitySecuritiesInterestRate1000PIKMember
Investment, Significant Unobservable Input [true false] [14] true true
Basis spread on variable rate [14] 0.00% 0.00% [11]
PIK Interest Rate [14] 10.00% 10.00%
Acquisition date [14] Dec. 27, 2021 Dec. 27, 2021
Principal, Shares, Units [14] $ 1,141,205 $ 1,141,205
Amortized cost [14] 1,328,162 1,328,162 [1]
Fair value [14] $ 3,515,825 $ 3,052,404 [2]
Percentage of net assets [14] 1.80% 1.60%
Investment, Identifier [Axis]: Proactive Dealer Solutions, LLC First Lien Senior Secured Term Loan LIBOR Spread 10.26% Interest Rate 15.59% Due 12/26/2026    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[18]   star:ProactiveDealerSolutionsLLCFirstLienSeniorSecuredTermLoanLIBORSpread1026InterestRate1559Due12262026Member
Investment, Significant Unobservable Input [true false] [18]   true
Basis spread on variable rate [11],[18]   10.26%
Interest Rate [18]   15.59%
Acquisition date [18]   Dec. 27, 2021
Maturity date [18]   Dec. 26, 2026
Principal, Shares, Units [18]   $ 3,074,615
Amortized cost [1],[18]   3,023,230
Fair value [2],[18]   $ 3,074,615
Percentage of net assets [18]   1.60%
Investment, Identifier [Axis]: Proactive Dealer Solutions, LLC First Lien Senior Secured Term Loan SOFR Spread 10.26% Interest Rate 15.66% Due 12/26/2026    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[17] star:ProactiveDealerSolutionsLLCFirstLienSeniorSecuredTermLoanSOFRSpread1026InterestRate1566Due12262026Member  
Investment, Significant Unobservable Input [true false] [17] true  
Basis spread on variable rate [17] 10.26%  
Interest Rate [17] 15.56%  
Acquisition date [17] Dec. 27, 2021  
Maturity date [17] Dec. 26, 2026  
Principal, Shares, Units [17] $ 3,033,268  
Amortized cost [17] 2,983,666  
Fair value [17] $ 3,063,601  
Percentage of net assets [17] 1.60%  
Investment, Identifier [Axis]: Professional Services First Lien Senior Secured Term Loan    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:ProfessionalServicesFirstLienSeniorSecuredTermLoanMember star:ProfessionalServicesFirstLienSeniorSecuredTermLoanMember
Principal, Shares, Units $ 19,142,820 $ 19,217,215
Amortized cost 18,892,641 18,953,038 [1]
Fair value $ 19,331,154 $ 19,254,525 [2]
Percentage of net assets 10.10% 10.10%
Investment, Identifier [Axis]: Professional Services Preferred Equity Securities    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:ProfessionalServicesPreferredEquitySecuritiesMember star:ProfessionalServicesPreferredEquitySecuritiesMember
Principal, Shares, Units $ 4,672,441 $ 4,672,441
Amortized cost 5,724,277 5,741,315 [1]
Fair value $ 10,469,477 $ 10,689,290 [2]
Percentage of net assets 5.40% 5.60%
Investment, Identifier [Axis]: Professional Services Second Lien Senior Secured Loan    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:ProfessionalServicesSecondLienSeniorSecuredLoanMember star:ProfessionalServicesSecondLienSeniorSecuredLoanMember
Investment, Significant Unobservable Input [true false] true true
Principal, Shares, Units $ 6,308,645 $ 6,359,542
Amortized cost 6,248,112 6,305,249 [1]
Fair value $ 6,067,024 $ 6,059,372 [2]
Percentage of net assets 3.20% 3.20%
Investment, Identifier [Axis]: Professional Services Warrants and Other Equity Securities    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:ProfessionalServicesWarrantsAndOtherEquitySecuritiesMember star:ProfessionalServicesWarrantsAndOtherEquitySecuritiesMember
Principal, Shares, Units $ 756 $ 756
Amortized cost 271,262 271,262 [1]
Fair value $ 753,351 $ 608,328 [2]
Percentage of net assets 0.40% 0.40%
Investment, Identifier [Axis]: PureCars Technologies Holdings, LLC Preferred Equity Securities Interest Rate 8.00% PIK    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[13],[14],[16] star:PureCarsTechnologiesHoldingsLLCPreferredEquitySecuritiesInterestRate800PIKMember star:PureCarsTechnologiesHoldingsLLCPreferredEquitySecuritiesInterestRate800PIKMember [20]
Investment, Significant Unobservable Input [true false] [13],[14],[16] true true
Basis spread on variable rate [13],[14],[16] 0.00% 0.00% [11]
PIK Interest Rate [13],[14],[16] 8.00% 8.00%
Acquisition date [13],[14],[16] Apr. 17, 2019 Apr. 17, 2019
Principal, Shares, Units [13],[14],[16] $ 514 $ 514
Amortized cost [13],[14],[16] 240,065 240,065 [1]
Fair value [13],[14],[16] $ 39,370 $ 19,192 [2]
Percentage of net assets [13],[14],[16] 0.00% 0.00%
Investment, Identifier [Axis]: PureCars Technologies, LLC First Lien Senior Secured Term Loan SOFR Spread 6.35% Plus 1.00% PIK Interest Rate 11.65% Plus 1.00% PIK Due 4/18/2024    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[17],[22] star:PureCarsTechnologiesLLCFirstLienSeniorSecuredTermLoanSOFRSpread635Plus100PIKInterestRate1165Plus100PIKDue4182024Member  
Investment, Significant Unobservable Input [true false] [17],[22] true  
Basis spread on variable rate [17],[22] 6.35%  
Paid in Kind Basis Spread Variable Rate [17],[22] 1.00%  
Interest Rate [17],[22] 11.65%  
PIK Interest Rate [17],[22] 1.00%  
Acquisition date [17],[22] Apr. 17, 2019  
Maturity date [17],[22] Apr. 18, 2024  
Principal, Shares, Units [17],[22] $ 1,475,255  
Amortized cost [17],[22] 1,470,408  
Fair value [17],[22] $ 1,475,107  
Percentage of net assets [17],[22] 0.80%  
Investment, Identifier [Axis]: PureCars Technologies, LLC First Lien Senior Secured Term Loan SOFR Spread 6.35% Plus 1.00% PIK Interest Rate 11.68% Plus 1.00% PIK Due 4/18/2024    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[12],[18],[22]   star:PureCarsTechnologiesFirstLienSeniorSecuredTermLoanLIBORSpreadSPlus635Cash100PIKInterestRate1168CashPlus100PIKDue4182024Member
Investment, Significant Unobservable Input [true false] [18],[22]   true
Basis spread on variable rate [11],[18],[22]   6.35%
Paid in Kind Basis Spread Variable Rate [11],[18],[22]   1.00%
Interest Rate [18],[22]   11.68%
PIK Interest Rate [18],[22]   1.00%
Acquisition date [18],[22]   Apr. 17, 2019
Maturity date [18],[22]   Apr. 18, 2024
Principal, Shares, Units [18],[22]   $ 1,471,687
Amortized cost [1],[18],[22]   1,464,114
Fair value [2],[18],[22]   $ 1,418,118
Percentage of net assets [18],[22]   0.70%
Investment, Identifier [Axis]: PureCars Technologies, LLC Preferred Equity Securities Interest Rate 8.00% PIK Due 7/26/2024    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[13],[14],[16] star:PureCarsTechnologiesLLCPreferredEquitySecuritiesInterestRate800PIKDue7262024Member star:PureCarsTechnologiesLLCPreferredEquitySecuritiesInterestRate800PIKDue7262024Member
Investment, Significant Unobservable Input [true false] [13],[14],[16] true true
Basis spread on variable rate [13],[14],[16] 0.00% 0.00% [11]
PIK Interest Rate [13],[14],[16] 8.00% 8.00%
Acquisition date [13],[14],[16] Jul. 25, 2022 Jul. 25, 2022
Maturity date [13],[14],[16] Jul. 26, 2024 Jul. 26, 2024
Principal, Shares, Units [13],[14],[16] $ 78 $ 78
Amortized cost [13],[14],[16] 26,948 26,948 [1]
Fair value [13],[14],[16] $ 30,042 $ 26,528 [2]
Percentage of net assets [13],[14],[16] 0.00% 0.00%
Investment, Identifier [Axis]: Rock Gate Capital, LLC (dba 160 Driving Academy) First Lien Senior Secured Term Loan SOFR Spread 7.50% Interest Rate 12.80% Due 10/16/2024    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:RockGateCapitalLLCDba160DrivingAcademyFirstLienSeniorSecuredTermLoanSOFRSpread750InterestRate1280Due10162024Member [17] star:RockGateCapitalLLCDba160DrivingAcademyFirstLienSeniorSecuredTermLoanLIBORSpread750InterestRate1269Due10162024Member [18]
Investment, Significant Unobservable Input [true false] true [17] true [18]
Basis spread on variable rate 7.50% [17] 7.50% [11],[18]
Interest Rate 12.80% [17] 12.83% [18]
Acquisition date Oct. 16, 2019 [17] Oct. 16, 2019 [18]
Maturity date Oct. 16, 2024 [17] Oct. 16, 2024 [18]
Principal, Shares, Units $ 14,903,034 [17] $ 15,000,652 [18]
Amortized cost 14,834,632 [17] 14,905,882 [1],[18]
Fair value $ 14,999,864 [17] $ 15,000,652 [2],[18]
Percentage of net assets 7.80% [17] 7.90% [18]
Investment, Identifier [Axis]: Rock Gate Capital, LLC (dba 160 Driving Academy) Warrants and Other Equity Securities    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:RockGateCapitalLLCDba160DrivingAcademyWarrantsAndOtherEquitySecuritiesMember star:RockGateCapitalLLCDba160DrivingAcademyWarrantsAndOtherEquitySecuritiesMember
Investment, Significant Unobservable Input [true false] true true
Basis spread on variable rate 0.00% 0.00% [11]
Interest Rate   0.00%
Acquisition date Oct. 16, 2019 Oct. 16, 2019
Principal, Shares, Units $ 12,693 $ 12,693
Amortized cost 0 0 [1]
Fair value $ 168,850 $ 181,524 [2]
Percentage of net assets 0.10% 0.10%
Investment, Identifier [Axis]: Senior Unsecured Notes    
Investments [Abstract]    
Investment, Type [Extensible Enumeration] [3],[4],[5],[6],[8],[9] Senior Unsecured Notes [Member] Senior Unsecured Notes [Member]
Amortized cost $ 2,033,098 $ 2,033,098 [1]
Fair value $ 1,265,130 $ 1,384,446 [2]
Percentage of net assets 0.70% 0.70%
Investment, Identifier [Axis]: SkyBell Technologies, Inc. First Lien Senior Secured Term Loan SOFR Spread 0.00% Interest Rate 0.00% Due 12/13/2024    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[25] star:SkyBellTechnologiesIncFirstLienSeniorSecuredTermLoanSOFRSpread000InterestRate000Due12132024Member [24] star:SkyBellTechnologiesIncFirstLienSeniorSecuredTermLoanSOFRSpread000InterestRate000Due12132024Member [26]
Investment, Significant Unobservable Input [true false] [25] true [24] true [26]
Basis spread on variable rate [25] 0.00% [24] 0.00% [11],[26]
Interest Rate [25] 0.00% [24] 0.00% [26]
Acquisition date [25] Dec. 13, 2019 [24] Dec. 13, 2019 [26]
Maturity date [25] Dec. 13, 2024 [24] Dec. 13, 2024 [26]
Principal, Shares, Units [25] $ 4,683,036 [24] $ 4,683,036 [26]
Amortized cost [25] 4,618,637 [24] 4,618,637 [1],[26]
Fair value [25] $ 2,341,518 [24] $ 2,341,518 [2],[26]
Percentage of net assets [25] 1.20% [24] 1.20% [26]
Investment, Identifier [Axis]: SkyBell Technologies, Inc. Warrants and Other Equity Securities    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:SkyBellTechnologiesIncWarrantsAndOtherEquitySecuritiesMember star:SkyBellTechnologiesIncWarrantsAndOtherEquitySecuritiesMember
Investment, Significant Unobservable Input [true false] true true
Basis spread on variable rate 0.00% 0.00% [11]
Interest Rate   0.00%
Acquisition date Dec. 13, 2019 Dec. 13, 2019
Principal, Shares, Units $ 1,846,180 $ 1,846,180
Amortized cost 0 0 [1]
Fair value $ 0 $ 0 [2]
Percentage of net assets 0.00% 0.00%
Investment, Identifier [Axis]: Software First Lien Senior Secured Term Loan    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:SoftwareFirstLienSeniorSecuredTermLoanMember star:SoftwareFirstLienSeniorSecuredTermLoanMember
Principal, Shares, Units $ 4,508,523 $ 4,546,302
Amortized cost 4,454,074 4,487,344 [1]
Fair value $ 4,538,708 $ 4,492,733 [2]
Percentage of net assets 2.40% 2.30%
Investment, Identifier [Axis]: Software Preferred Equity Securities    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:SoftwarePreferredEquitySecuritiesMember star:SoftwarePreferredEquitySecuritiesMember
Principal, Shares, Units $ 1,141,797 $ 1,141,797
Amortized cost 1,595,175 1,595,175 [1]
Fair value $ 3,585,237 $ 3,098,124 [2]
Percentage of net assets 1.80% 1.60%
Investment, Identifier [Axis]: Specialty Retail First Lien Senior Secured Term Loan    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:SpecialtyRetailFirstLienSeniorSecuredTermLoanMember star:SpecialtyRetailFirstLienSeniorSecuredTermLoanMember
Principal, Shares, Units $ 6,508,116 $ 6,452,101
Amortized cost 6,397,426 6,333,920 [1]
Fair value $ 6,207,441 $ 6,367,578 [2]
Percentage of net assets 3.20% 3.30%
Investment, Identifier [Axis]: Swyft AcquireCo LLC (dba Swyft Filings) First Lien Senior Secured Term Loan SOFR Spread 2.75% Interest Rate 8.08% Due 12/20/2027    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[20] star:SwyftAcquireCoLLCDbaSwyftFilingsFirstLienSeniorSecuredTermLoanSOFRSpread275InterestRate808Due12202027Member [7] star:SwyftAcquireCoLLCDbaSwyftFilingsFirstLienSeniorSecuredTermLoanSOFRSpread275InterestRate755Due12202027Member [10],[18]
Investment, Significant Unobservable Input [true false] [20] true [7] true [10]
Basis spread on variable rate [20] 2.75% [7] 2.75% [10],[11]
Interest Rate [20] 8.08% [7] 8.10% [10]
Acquisition date [20] Dec. 20, 2021 [7] Dec. 20, 2021 [10]
Maturity date [20] Dec. 20, 2027 [7] Dec. 20, 2027 [10]
Principal, Shares, Units [20] $ 297,538 [7] $ 299,236 [10]
Amortized cost [20] 293,710 [7] 295,384 [1],[10]
Fair value [20] $ 293,074 [7] $ 297,441 [2],[10]
Percentage of net assets [20] 0.20% [7] 0.20% [10]
Investment, Identifier [Axis]: Swyft AcquireCo LLC (dba Swyft Filings) First Lien Senior Secured Term Loan SOFR Spread 5.50% Interest Rate 10.83% Due 12/20/2027    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[22] star:SwyftAcquireCoLLCDbaSwyftFilingsFirstLienSeniorSecuredTermLoanSOFRSpread550InterestRate1083Due12202027Member [7] star:SwyftAcquireCoLLCDbaSwyftFilingsFirstLienSeniorSecuredTermLoanSOFRSpread550InterestRate1030Due12202027Member [10],[12]
Investment, Significant Unobservable Input [true false] [22] true [7] true [10]
Basis spread on variable rate [22] 5.50% [7] 5.50% [10],[11]
Interest Rate [22] 10.83% [7] 10.85% [10]
Acquisition date [22] Dec. 20, 2021 [7] Dec. 20, 2021 [10]
Maturity date [22] Dec. 20, 2027 [7] Dec. 20, 2027 [10]
Principal, Shares, Units [22] $ 3,682,383 [7] $ 3,682,383 [10]
Amortized cost [22] 3,637,081 [7] 3,633,920 [1],[10]
Fair value [22] $ 3,413,936 [7] $ 3,483,902 [2],[10]
Percentage of net assets [22] 1.80% [7] 1.80% [10]
Investment, Identifier [Axis]: Swyft Filings Holdings, LLC Preferred Equity Securities Interest Rate 8.00% PIK    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[13],[16],[31] star:SwyftFilingsHoldingsLLCPreferredEquitySecuritiesInterestRate800PIKMember star:SwyftFilingsHoldingsLLCPreferredEquitySecuritiesInterestRate800PIKMember [14],[26],[28]
Investment, Significant Unobservable Input [true false] [13],[16],[31] true true [14]
Basis spread on variable rate [13],[16],[31] 0.00% 0.00% [11],[14]
PIK Interest Rate [13],[16],[31] 8.00% 8.00% [14]
Acquisition date [13],[16],[31] Dec. 20, 2021 Dec. 20, 2021 [14]
Principal, Shares, Units [13],[16],[31] $ 192,444 $ 192,444 [14]
Amortized cost [13],[16],[31] 183,612 183,612 [1],[14]
Fair value [13],[16],[31] $ 202,157 $ 227,311 [2],[14]
Percentage of net assets [13],[16],[31] 0.10% 0.10% [14]
Investment, Identifier [Axis]: TCP Acquisition, LLC (dba HighStar Traffic) First Lien Senior Secured Term Loan SOFR Spread 7.50% Interest Rate 12.80% Due 7/26/2027    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[17] star:TCPAcquisitionLLCDbaHighStarTrafficFirstLienSeniorSecuredTermLoanSOFRSpread750InterestRate1280Due7262027Member  
Investment, Significant Unobservable Input [true false] [17] true  
Basis spread on variable rate [17] 7.50%  
Interest Rate [17] 12.80%  
Acquisition date [17] Jul. 26, 2022  
Maturity date [17] Jul. 26, 2027  
Principal, Shares, Units [17] $ 10,606,162  
Amortized cost [17] 10,418,742  
Fair value [17] $ 10,642,223  
Percentage of net assets [17] 5.60%  
Investment, Identifier [Axis]: TCP Acquisition, LLC (dba HighStar Traffic) First Lien Senior Secured Term Loan SOFR Spread 7.50% Interest Rate 12.83% Due 7/26/2027    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[12],[18],[19]   star:TCPAcquisitionLLCDbaHighStarTrafficFirstLienSeniorSecuredTermLoanSOFRSpread750InterestRate1283Due7262027Member
Investment, Significant Unobservable Input [true false] [18],[19]   true
Basis spread on variable rate [11],[18],[19]   7.50%
Interest Rate [18],[19]   12.83%
Acquisition date [18],[19]   Jul. 26, 2022
Maturity date [18],[19]   Jul. 26, 2027
Principal, Shares, Units [18],[19]   $ 10,676,188
Amortized cost [1],[18],[19]   10,474,007
Fair value [2],[18],[19]   $ 10,473,968
Percentage of net assets [18],[19]   5.50%
Investment, Identifier [Axis]: Texas Contract Manufacturing Group, Inc. First Lien Senior Secured Term Loan SOFR Spread 12.11% Interest Rate 17.41% Due 4/27/2027    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[17] star:TexasContractManufacturingGroupIncFirstLienSeniorSecuredTermLoanSOFRSpread1211InterestRate1741Due4272027Member  
Investment, Significant Unobservable Input [true false] [17] true  
Basis spread on variable rate [17] 12.11%  
Interest Rate [17] 17.41%  
Acquisition date [17] Apr. 27, 2022  
Maturity date [17] Apr. 27, 2027  
Principal, Shares, Units [17] $ 4,833,807  
Amortized cost [17] 4,763,104  
Fair value [17] $ 4,173,509  
Percentage of net assets [17] 2.20%  
Investment, Identifier [Axis]: Texas Contract Manufacturing Group, Inc. First Lien Senior Secured Term Loan SOFR Spread 12.11% Interest Rate 17.44% Due 4/27/2027    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[18]   star:TexasContractManufacturingGroupIncFirstLienSeniorSecuredTermLoanSOFRSpread1211InterestRate1702Due4272027Member
Investment, Significant Unobservable Input [true false] [18]   true
Basis spread on variable rate [11],[18]   12.11%
Interest Rate [18]   17.44%
Acquisition date [18]   Apr. 27, 2022
Maturity date [18]   Apr. 27, 2027
Principal, Shares, Units [18]   $ 4,909,896
Amortized cost [1],[18]   4,832,798
Fair value [2],[18]   $ 4,196,979
Percentage of net assets [18]   2.20%
Investment, Identifier [Axis]: Texas Contract Manufacturing Group, Inc. Warrants and Other Equity Securities    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:TexasContractManufacturingGroupIncWarrantsAndOtherEquitySecuritiesMember star:TexasContractManufacturingGroupIncWarrantsAndOtherEquitySecuritiesMember
Investment, Significant Unobservable Input [true false] true true
Basis spread on variable rate 0.00% 0.00% [11]
Interest Rate   0.00%
Acquisition date Apr. 27, 2022 Apr. 27, 2022
Principal, Shares, Units $ 1,602 $ 1,602
Amortized cost 0 0 [1]
Fair value $ 262,258 $ 490,323 [2]
Percentage of net assets 0.10% 0.30%
Investment, Identifier [Axis]: The Range NYC, LLC (dba Five Iron Golf) First Lien Senior Secured Term Loan SOFR Spread 7.61% Interest Rate 12.91% Due 9/15/2027    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[17],[23] star:TheRangeNYCLLCDbaFiveIronGolfFirstLienSeniorSecuredTermLoanSOFRSpread761InterestRate1291Due9152027Member  
Investment, Significant Unobservable Input [true false] [17],[23] true  
Basis spread on variable rate [17],[23] 7.61%  
Interest Rate [17],[23] 12.91%  
Acquisition date [17],[23] Sep. 15, 2022  
Maturity date [17],[23] Sep. 15, 2027  
Principal, Shares, Units [17],[23] $ 4,966,387  
Amortized cost [17],[23] 4,835,585  
Fair value [17],[23] $ 4,876,992  
Percentage of net assets [17],[23] 2.60%  
Investment, Identifier [Axis]: The Range NYC, LLC (dba Five Iron Golf) First Lien Senior Secured Term Loan SOFR Spread 7.61% Interest Rate 12.94% Due 9/15/2027    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[18],[19]   star:TheRangeNYCLLCDbaFiveIronGolfFirstLienSeniorSecuredTermLoanSOFRSpread761InterestRate1294Due9152027Member
Investment, Significant Unobservable Input [true false] [18],[19]   true
Basis spread on variable rate [11],[18],[19]   7.61%
Interest Rate [18],[19]   12.94%
Acquisition date [18],[19]   Sep. 15, 2022
Maturity date [18],[19]   Sep. 15, 2027
Principal, Shares, Units [18],[19]   $ 4,978,992
Amortized cost [1],[18],[19]   4,839,259
Fair value [2],[18],[19]   $ 4,876,922
Percentage of net assets [18],[19]   2.60%
Investment, Identifier [Axis]: The Range NYC, LLC (dba Five Iron Golf) Warrants and Other Equity Securities    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:TheRangeNYCLLCDbaFiveIronGolfWarrantsAndOtherEquitySecuritiesMember star:TheRangeNYCLLCDbaFiveIronGolfWarrantsAndOtherEquitySecuritiesMember
Investment, Significant Unobservable Input [true false] true true
Basis spread on variable rate 0.00% 0.00% [11]
Interest Rate   0.00%
Acquisition date Sep. 15, 2022 Sep. 15, 2022
Principal, Shares, Units $ 21,210 $ 21,210
Amortized cost 71,599 71,599 [1]
Fair value $ 56,136 $ 32,606 [2]
Percentage of net assets 0.00% 0.00%
Investment, Identifier [Axis]: Trading Companies & Distributors First Lien Senior Secured Term Loan    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:TradingCompaniesDistributorsFirstLienSeniorSecuredTermLoanMember star:TradingCompaniesDistributorsFirstLienSeniorSecuredTermLoanMember
Principal, Shares, Units $ 7,154,451 $ 15,748,814
Amortized cost 7,024,226 15,510,605 [1]
Fair value $ 268,292 $ 10,144,017 [2]
Percentage of net assets 0.20% 5.40%
Investment, Identifier [Axis]: Trading Companies & Distributors Preferred Equity Securities    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:TradingCompaniesDistributorsPreferredEquitySecuritiesMember star:TradingCompaniesDistributorsPreferredEquitySecuritiesMember
Investment, Significant Unobservable Input [true false] true  
Principal, Shares, Units $ 469 $ 9,844
Amortized cost 476,074 476,074 [1]
Fair value $ 0 $ 0 [2]
Percentage of net assets 0.00% 0.00%
Investment, Identifier [Axis]: Trading Companies & Distributors Warrants and Other Equity Securities    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:TradingCompaniesDistributorsWarrantsAndOtherEquitySecuritiesMember star:TradingCompaniesDistributorsWarrantsAndOtherEquitySecuritiesMember
Principal, Shares, Units $ 204 $ 204
Amortized cost 0 0 [1]
Fair value $ 0 $ 0 [2]
Percentage of net assets 0.00% 0.00%
Investment, Identifier [Axis]: Trailer Park Group Holdings LLC - Class A Units Preferred Equity Securities Interest Rate 8.00% PIK    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[13],[14],[16] star:TrailerParkGroupHoldingsLLCClassAUnitsPreferredEquitySecuritiesInterestRate800PIKMember star:TrailerParkGroupHoldingsLLCClassAUnitsPreferredEquitySecuritiesInterestRate800PIKMember [20]
Investment, Significant Unobservable Input [true false] [13],[14],[16] true true
Basis spread on variable rate [13],[14],[16] 0.00% 0.00% [11]
PIK Interest Rate [13],[14],[16] 8.00% 8.00%
Acquisition date [13],[14],[16] Aug. 02, 2021 Aug. 02, 2021
Principal, Shares, Units [13],[14],[16] $ 371,822 $ 371,822
Amortized cost [13],[14],[16] 367,108 367,108 [1]
Fair value [13],[14],[16] $ 727,656 $ 696,609 [2]
Percentage of net assets [13],[14],[16] 0.40% 0.40%
Investment, Identifier [Axis]: Trailer Park Group Holdings LLC - Class A-1 Units Preferred Equity Securities Interest Rate 15.00% PIK    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[13],[14] star:TrailerParkGroupHoldingsLLCClassA1UnitsPreferredEquitySecuritiesInterestRate1500PIKMember star:TrailerParkGroupHoldingsLLCClassA1UnitsPreferredEquitySecuritiesInterestRate1500PIKMember [20]
Investment, Significant Unobservable Input [true false] [13],[14] true true
Basis spread on variable rate [13],[14] 0.00% 0.00% [11]
Interest Rate [13],[14]   0.00%
PIK Interest Rate [13],[14] 15.00%  
Acquisition date [13],[14] Dec. 19, 2023 Dec. 19, 2023
Principal, Shares, Units [13],[14] $ 40,888 $ 40,888
Amortized cost [13],[14] 73,599 73,599 [1]
Fair value [13],[14] $ 110,402 $ 112,309 [2]
Percentage of net assets [13],[14] 0.10% 0.10%
Investment, Identifier [Axis]: Trailer Park Group Holdings LLC First Lien Senior Secured Term Loan SOFR Spread 6.76% Plus 1.50% PIK Interest Rate 12.06% Plus 1.50% PIK Due 8/2/2026    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[17],[22] star:TrailerParkGroupHoldingsLLCFirstLienSeniorSecuredTermLoanSOFRSpread676Plus150PIKInterestRate1206Plus150PIKDue822026Member  
Investment, Significant Unobservable Input [true false] [17],[22] true  
Basis spread on variable rate [17],[22] 6.76%  
Paid in Kind Basis Spread Variable Rate [17],[22] 1.50%  
Interest Rate [17],[22] 12.06%  
PIK Interest Rate [17],[22] 1.50%  
Acquisition date [17],[22] Aug. 02, 2021  
Maturity date [17],[22] Aug. 02, 2026  
Principal, Shares, Units [17],[22] $ 14,551,746  
Amortized cost [17],[22] 14,325,830  
Fair value [17],[22] $ 14,481,898  
Percentage of net assets [17],[22] 7.60%  
Investment, Identifier [Axis]: Trailer Park Group Holdings LLC First Lien Senior Secured Term Loan SOFR Spread 6.76% Plus 1.50% PIK Interest Rate 12.09% Plus 1.50% PIK Due 8/2/2026    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[12],[18],[22]   star:TrailerParkGroupHoldingsLLCFirstLienSeniorSecuredTermLoanSOFRSpread676CashPlus150PIKInterestRate1209CashPlus150PIKDue822026Member
Investment, Significant Unobservable Input [true false] [18],[22]   true
Basis spread on variable rate [11],[18],[22]   6.76%
Paid in Kind Basis Spread Variable Rate [11],[18],[22]   1.50%
Interest Rate [18],[22]   12.09%
PIK Interest Rate [18],[22]   1.50%
Acquisition date [18],[22]   Aug. 02, 2021
Maturity date [18],[22]   Aug. 02, 2026
Principal, Shares, Units [18],[22]   $ 14,472,961
Amortized cost [1],[18],[22]   14,244,796
Fair value [2],[18],[22]   $ 14,218,237
Percentage of net assets [18],[22]   7.50%
Investment, Identifier [Axis]: Transportation Infrastructure First Lien Senior Secured Term Loan    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:TransportationInfrastructureFirstLienSeniorSecuredTermLoanMember star:TransportationInfrastructureFirstLienSeniorSecuredTermLoanMember
Principal, Shares, Units $ 10,606,162 $ 10,676,188
Amortized cost 10,418,742 10,474,007 [1]
Fair value $ 10,642,223 $ 10,473,968 [2]
Percentage of net assets 5.60% 5.50%
Investment, Identifier [Axis]: UJP Acquisition, LLC (dba Uncle John's Pride) Preferred Equity Securities Interest Rate 8.00% PIK    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[13],[14],[16] star:UJPAcquisitionLLCDbaUncleJohnSPridePreferredEquitySecuritiesInterestRate800PIKMember star:UJPAcquisitionLLCDbaUncleJohnSPridePreferredEquitySecuritiesInterestRate800PIKMember [20]
Investment, Significant Unobservable Input [true false] [13],[14],[16] true true
Basis spread on variable rate [13],[14],[16] 0.00% 0.00% [11]
PIK Interest Rate [13],[14],[16] 8.00% 8.00%
Acquisition date [13],[14],[16] Mar. 31, 2022 Mar. 31, 2022
Principal, Shares, Units [13],[14],[16] $ 2,829,787 $ 2,829,787
Amortized cost [13],[14],[16] 2,829,787 2,829,787 [1]
Fair value [13],[14],[16] $ 4,252,128 $ 4,482,681 [2]
Percentage of net assets [13],[14],[16] 2.20% 2.40%
Investment, Identifier [Axis]: UJP Acquisition, LLC (dba Uncle John's Pride) Warrants and Other Equity Securities    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[14] star:UJPAcquisitionLLCDbaUncleJohnSPrideWarrantsAndOtherEquitySecuritiesMember star:UJPAcquisitionLLCDbaUncleJohnSPrideWarrantsAndOtherEquitySecuritiesMember
Investment, Significant Unobservable Input [true false] [14] true true
Basis spread on variable rate [14] 0.00% 0.00% [11]
Interest Rate [14]   0.00%
Acquisition date [14] Mar. 31, 2022 Mar. 31, 2022
Principal, Shares, Units [14] $ 127,215 $ 127,215
Amortized cost [14] 0 0 [1]
Fair value [14] $ 47,064 $ 53,021 [2]
Percentage of net assets [14] 0.00% 0.00%
Investment, Identifier [Axis]: USBid Inc. - Class A Units Preferred Equity Securities    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:USBidIncClassAUnitsPreferredEquitySecuritiesMember star:USBidIncClassAUnitsPreferredEquitySecuritiesMember
Investment, Significant Unobservable Input [true false] true true
Basis spread on variable rate 0.00% 0.00% [11]
Interest Rate 0.00% 0.00%
Acquisition date Nov. 03, 2022 Nov. 03, 2022
Principal, Shares, Units $ 469 $ 469
Amortized cost 468,750 468,750 [1]
Fair value $ 0 $ 0 [2]
Percentage of net assets 0.00% 0.00%
Investment, Identifier [Axis]: USBid Inc. - Class C Units Preferred Equity Securities    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[16] star:USBidIncClassCUnitsPreferredEquitySecuritiesMember star:USBidIncClassCUnitsPreferredEquitySecuritiesMember, star:USBidIncPreferredEquitySecuritiesMember
Investment, Significant Unobservable Input [true false] [16] true true
Basis spread on variable rate [16] 0.00% 0.00% [11]
Interest Rate [16] 0.00%  
PIK Interest Rate [16]   10.00%
Acquisition date [16] Nov. 02, 2023 Nov. 02, 2023
Principal, Shares, Units [16] $ 9,375 $ 9,375
Amortized cost [16] 7,324 7,324 [1]
Fair value [16] $ 0 $ 0 [2]
Percentage of net assets [16] 0.00% 0.00%
Investment, Identifier [Axis]: USBid Inc. First Lien Senior Secured Term Loan SOFR Spread 7.26% Interest Rate 12.56% Due 11/3/2027    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[22] star:USBidIncFirstLienSeniorSecuredTermLoanSOFRSpread726InterestRate1256Due1132027Member [17] star:USBidIncFirstLienSeniorSecuredTermLoanSOFRSpread726InterestRate1259Due1132027Member [12],[18]
Investment, Significant Unobservable Input [true false] [22] true [17] true [18]
Basis spread on variable rate [22] 7.26% [17] 7.26% [11],[18]
Interest Rate [22] 12.56% [17] 12.59% [18]
Acquisition date [22] Nov. 03, 2022 [17] Nov. 03, 2022 [18]
Maturity date [22] Nov. 03, 2027 [17] Nov. 03, 2027 [18]
Principal, Shares, Units [22] $ 7,154,451 [17] $ 7,154,451 [18]
Amortized cost [22] 7,024,226 [17] 7,016,197 [1],[18]
Fair value [22] $ 268,292 [17] $ 1,549,654 [2],[18]
Percentage of net assets [22] 0.20% [17] 0.90% [18]
Investment, Identifier [Axis]: USBid Inc. Warrants and Other Equity Securities    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:USBidIncWarrantsAndOtherEquitySecuritiesMember star:USBidIncWarrantsAndOtherEquitySecuritiesMember
Investment, Significant Unobservable Input [true false] true true
Basis spread on variable rate 0.00% 0.00% [11]
Interest Rate   0.00%
Acquisition date Nov. 03, 2022 Nov. 03, 2022
Principal, Shares, Units $ 204 $ 204
Amortized cost 0 0 [1]
Fair value $ 0 $ 0 [2]
Percentage of net assets 0.00% 0.00%
Investment, Identifier [Axis]: Uncle John's Pride, LLC First Lien Senior Secured Term Loan SOFR Spread 10.11% Interest Rate 15.44% Due 3/31/2027    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:UncleJohnSPrideLLCFirstLienSeniorSecuredTermLoanSOFRSpread1011InterestRate1544Due3312027Member [7] star:UncleJohnSPrideLLCFirstLienSeniorSecuredTermLoanSOFRSpread1011InterestRate1491Due3312027Member [10]
Investment, Significant Unobservable Input [true false] true [7] true [10]
Basis spread on variable rate 10.11% [7] 10.11% [10],[11]
Paid in Kind Basis Spread Variable Rate [10]   15.46%
Interest Rate [7] 15.44%  
Acquisition date Mar. 31, 2022 [7] Mar. 31, 2022 [10]
Maturity date Mar. 31, 2027 [7] Mar. 31, 2027 [10]
Principal, Shares, Units $ 7,101,095 [7] $ 7,146,952 [10]
Amortized cost 6,980,808 [7] 7,017,250 [1],[10]
Fair value $ 7,142,992 [7] $ 7,146,952 [2],[10]
Percentage of net assets 3.70% [7] 3.80% [10]
Investment, Identifier [Axis]: Versar Inc. First Lien Senior Secured Term Loan SOFR Spread 8.10% Interest Rate 13.40% Due 8/4/2028    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[17],[22] star:VersarIncFirstLienSeniorSecuredTermLoanSOFRSpread810InterestRate1340Due842028Member  
Investment, Significant Unobservable Input [true false] [17],[22] true  
Basis spread on variable rate [17],[22] 8.10%  
Interest Rate [17],[22] 13.40%  
Acquisition date [17],[22] Aug. 04, 2023  
Maturity date [17],[22] Aug. 04, 2028  
Principal, Shares, Units [17],[22] $ 10,000,000  
Amortized cost [17],[22] 9,631,058  
Fair value [17],[22] $ 9,631,058  
Percentage of net assets [17],[22] 5.00%  
Investment, Identifier [Axis]: Versar Inc. First Lien Senior Secured Term Loan SOFR Spread 8.10% Interest Rate 13.43% Due 8/4/2028    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[18],[22]   star:VersarIncSeniorSecuredTermLoanSOFRSpread810InterestRate1343Due842028Member
Investment, Significant Unobservable Input [true false] [18],[22]   true
Basis spread on variable rate [11],[18],[22]   8.10%
Interest Rate [18],[22]   13.43%
Acquisition date [18],[22]   Aug. 04, 2023
Maturity date [18],[22]   Aug. 04, 2028
Principal, Shares, Units [18],[22]   $ 10,000,000
Amortized cost [1],[18],[22]   9,662,349
Fair value [2],[18],[22]   $ 9,662,349
Percentage of net assets [18],[22]   5.10%
Investment, Identifier [Axis]: Vertical Mechanical Group Holdings, LLC Preferred Equity Securities    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[14] star:VerticalMechanicalGroupHoldingsLLCPreferredEquitySecuritiesMember star:VerticalMechanicalGroupHoldingsLLCPreferredEquitySecuritiesMember [20]
Investment, Significant Unobservable Input [true false] [14] true true
Basis spread on variable rate [14] 0.00% 0.00% [11]
Interest Rate [14]   0.00%
PIK Interest Rate [14] 0.00%  
Acquisition date [14] May 12, 2023 May 12, 2023
Principal, Shares, Units [14] $ 185,714 $ 185,714
Amortized cost [14] 1,857,143 1,857,143 [1]
Fair value [14] $ 3,687,143 $ 3,188,286 [2]
Percentage of net assets [14] 1.90% 1.70%
Investment, Identifier [Axis]: Vertical Mechanical Group, LLC First Lien Senior Secured Term Loan SOFR Spread 7.76% Interest Rate 13.06% Due 5/12/2028    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[17],[22] star:VerticalMechanicalGroupLLCFirstLienSeniorSecuredTermLoanSOFRSpread776InterestRate1306Due5122028Member  
Investment, Significant Unobservable Input [true false] [17],[22] true  
Basis spread on variable rate [17],[22] 7.76%  
Interest Rate [17],[22] 13.06%  
Acquisition date [17],[22] May 12, 2023  
Maturity date [17],[22] May 12, 2028  
Principal, Shares, Units [17],[22] $ 4,571,429  
Amortized cost [17],[22] 4,420,000  
Fair value [17],[22] $ 4,533,029  
Percentage of net assets [17],[22] 2.40%  
Investment, Identifier [Axis]: Vertical Mechanical Group, LLC First Lien Senior Secured Term Loan SOFR Spread 7.76% Interest Rate 13.09% Due 5/12/2028    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[18],[22]   star:VerticalMechanicalGroupLLCSeniorSecuredTermLoanSOFRSpread776InterestRate1309Due5122028Member
Investment, Significant Unobservable Input [true false] [18],[22]   true
Basis spread on variable rate [11],[18],[22]   7.76%
Interest Rate [18],[22]   13.09%
Acquisition date [18],[22]   May 12, 2023
Maturity date [18],[22]   May 12, 2028
Principal, Shares, Units [18],[22]   $ 4,571,429
Amortized cost [1],[18],[22]   4,420,000
Fair value [2],[18],[22]   $ 4,420,000
Percentage of net assets [18],[22]   2.30%
Investment, Identifier [Axis]: Warrants and Other Equity Securities    
Investments [Abstract]    
Investment, Type [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[28],[30] Warrants and Other Equity Securities [Member] Warrants and Other Equity Securities [Member]
Amortized cost $ 2,867,756 $ 2,867,756 [1]
Fair value $ 6,039,575 $ 5,706,423 [2]
Percentage of net assets 3.20% 3.10%
Investment, Identifier [Axis]: Watt Acquisition, LLC First Lien Senior Secured Term Loan SOFR Spread 14.25% Interest Rate 13.68% Plus 5.86% PIK Due 4/15/2027    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[22] star:WattAcquisitionLLCFirstLienSeniorSecuredTermLoanSOFRSpread1425InterestRate1368Plus586PIKDue4152027Member [17] star:WattAcquisitionLLCFirstLienSeniorSecuredTermLoanSOFRSpread1125InterestRate1616Due4152027Member [12],[18]
Investment, Significant Unobservable Input [true false] [22] true [17] true [18]
Basis spread on variable rate [22] 14.25% [17] 11.25% [11],[18]
Interest Rate [22] 13.68% [17] 16.58% [18]
PIK Interest Rate [17],[22] 5.86%  
Acquisition date [22] Apr. 15, 2022 [17] Apr. 15, 2022 [18]
Maturity date [22] Apr. 15, 2027 [17] Apr. 15, 2027 [18]
Principal, Shares, Units [22] $ 2,463,239 [17] $ 3,653,125 [18]
Amortized cost [22] 2,429,059 [17] 3,597,178 [1],[18]
Fair value [22] $ 2,148,190 [17] $ 3,132,920 [2],[18]
Percentage of net assets [22] 1.10% [17] 1.60% [18]
Investment, Identifier [Axis]: Watt Contracting Holdings, LLC Preferred Equity Securities Interest Rate 15.00% PIK    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[14],[16] star:WattContractingHoldingsLLCPreferredEquitySecuritiesInterestRate1500PIKMember star:WattContractingHoldingsLLCPreferredEquitySecuritiesInterestRate1500PIKMember
Investment, Significant Unobservable Input [true false] [14],[16] true true
Basis spread on variable rate [14],[16] 0.00% 0.00% [11]
PIK Interest Rate [14],[16] 15.00% 15.00%
Acquisition date [14],[16] Apr. 15, 2022 Apr. 15, 2022
Principal, Shares, Units [14],[16] $ 3,375 $ 2,110
Amortized cost [14],[16] 3,316,130 2,077,366 [1]
Fair value [14],[16] $ 163,211 $ 133,929 [2]
Percentage of net assets [14],[16] 0.10% 0.10%
Investment, Identifier [Axis]: Watt Contracting Holdings, LLC Warrants and Other Equity Securities    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[14] star:WattContractingHoldingsLLCWarrantsAndOtherEquitySecuritiesMember star:WattContractingHoldingsLLCWarrantsAndOtherEquitySecuritiesMember
Investment, Significant Unobservable Input [true false] [14] true true
Basis spread on variable rate [14] 0.00% 0.00% [11]
Interest Rate [14]   0.00%
Acquisition date [14] Apr. 15, 2022 Apr. 15, 2022
Principal, Shares, Units [14] $ 295 $ 218
Amortized cost [14] 0 0 [1]
Fair value [14] $ 0 $ 0 [2]
Percentage of net assets [14] 0.00% 0.00%
Investment, Identifier [Axis]: YTC Holdings, Inc. (dba Yorktel) First Lien Senior Secured Term Loan SOFR Spread 10.01% Interest Rate 15.31% Due 1/31/2025    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:YTCHoldingsIncDbaYorktelFirstLienSeniorSecuredTermLoanSOFRSpread1001InterestRate1531Due1312025Member [17] star:YTCHoldingsIncDbaYorktelFirstLienSeniorSecuredTermLoanLIBORSpread975InterestRate1494Due9232024Member [18],[19]
Investment, Significant Unobservable Input [true false] true [17] true [18],[19]
Basis spread on variable rate 10.01% [17] 10.01% [11],[18],[19]
Interest Rate 15.31% [17] 15.34% [18],[19]
Acquisition date Sep. 23, 2019 [17] Sep. 23, 2019 [18],[19]
Maturity date Jan. 31, 2025 [17] Jan. 31, 2025 [18],[19]
Principal, Shares, Units $ 5,181,806 [17] $ 4,632,805 [18],[19]
Amortized cost 5,134,300 [17] 4,600,276 [1],[18],[19]
Fair value $ 5,181,806 [17] $ 4,632,805 [2],[18],[19]
Percentage of net assets 2.70% [17] 2.40% [18],[19]
Investment, Identifier [Axis]: York Telecom Corporation (dba Yorktel) Preferred Equity Securities Interest Rate 8.00% PIK    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9],[13] star:YorkTelecomCorporationDbaYorktelPreferredEquitySecuritiesInterestRate800PIKMember star:YTCHoldingsIncDbaYorktelPreferredEquitySecuritiesInterestRate800PIKMember [20]
Investment, Significant Unobservable Input [true false] [13] true true
Basis spread on variable rate [13] 0.00% 0.00% [11]
PIK Interest Rate [13] 8.00% 8.00%
Acquisition date [13] Sep. 23, 2019 Sep. 23, 2019
Principal, Shares, Units [13] $ 151,018 $ 151,018
Amortized cost [13] 2,327,393 2,327,393 [1]
Fair value [13] $ 2,053,991 $ 1,926,709 [2]
Percentage of net assets [13] 1.10% 1.00%
Investment, Identifier [Axis]: York Telecom Corporation (dba Yorktel) Warrants and Other Equity Securities    
Investments [Abstract]    
Investment, Issuer Name [Extensible Enumeration] [3],[4],[5],[6],[8],[9] star:YorkTelecomCorporationDbaYorktelWarrantsAndOtherEquitySecuritiesMember star:YorkTelecomCorporationDbaYorktelWarrantsAndOtherEquitySecuritiesMember
Investment, Significant Unobservable Input [true false] true true
Basis spread on variable rate 0.00% 0.00% [11]
Interest Rate   0.00%
Acquisition date Sep. 23, 2019 Sep. 23, 2019
Principal, Shares, Units $ 77,195 $ 77,195
Amortized cost 0 0 [1]
Fair value $ 638,932 $ 582,640 [2]
Percentage of net assets 0.30% 0.30%
[1] The amortized cost represents the original cost adjusted for the amortization of discounts and premiums, as applicable, on debt investments using the effective interest method.
[2] Because there is no readily available market value for these investments, the fair value of each of these investments is determined in good faith using significant unobservable inputs by the Company’s board of directors (the “Board”) as required by the 1940 Act. See Note 4 “Fair Value Measurements” in the accompanying notes to the consolidated financial statements.
[3] All investments are co-investments made with the Company’s affiliates in accordance with the terms of the exemptive relief that the Company received from the U.S. Securities and Exchange Commission (the “SEC”), unless otherwise noted. See Note 6 “Transactions with Related Parties” in the accompanying notes to the consolidated financial statements.
[4] All investments are non-controlled/non-affiliated investments as defined by the 1940 Act, unless otherwise noted. The 1940 Act classifies investments based on the level of control that the Company maintains in a particular portfolio company.
[5] All of the Company’s investments are issued by eligible portfolio companies, as defined in the Investment Company Act of 1940 (the “1940 Act”), unless otherwise noted. All of the Company’s investments are issued by U.S. portfolio companies unless otherwise noted.
[6] Except as otherwise noted, all of the Company’s portfolio company investments are subject to legal restrictions on sales.
[7] The interest rate on these loans is subject to 1 month SOFR, which was 5.33% as of March 31, 2024.
[8] Unless otherwise indicated, all investments are considered Level 3 assets.
[9] Unless otherwise indicated, the Company’s portfolio companies are pledged as collateral supporting the amounts outstanding under the Secured Credit Facility (as defined herein).
[10] The interest rate on these loans is subject to 1 month SOFR, which was 5.35% as of December 31, 2023.
[11] Loan contains a variable rate structure and may be subject to an interest rate floor. Variable rate loans bear interest at a rate that may be determined by reference to either the Secured Overnight Financing Rate (“SOFR” or “S”) or an alternate base rate which can include the Federal Funds Effective Rate or the Prime Rate, at the borrower’s option, and which reset periodically based on the terms of the loan agreement. Interest rates subject to SOFR are typically accompanied by a Credit Spread Adjustment (“CSA”).
[12] As defined in the 1940 Act, the Company is deemed to be both an “Affiliated Person” and may have “Control” of this portfolio company as the Company and/or its affiliated funds collectively owns more than 25% of the portfolio company’s outstanding voting securities or has the power to exercise control over management or policies of such portfolio company (including through a management agreement). The Company’s investment in affiliates for the three months ended March 31, 2024 were Arrow Home Health, LLC and Caregility Corporation which represented $9,044,328 of Fair Value and 4.7% of Net Assets of the Company. Transactions related to investments in “Controlled/Affiliate Investments” for the three months ended March 31, 2024 were as follows:
[13] Investment contains a fixed rate structure.
[14] Investment is held by a subsidiary of the Company. See Note 2 in the accompanying notes to the consolidated financial statements for additional information on the Company’s wholly-owned subsidiary.
[15] As defined in the 1940 Act, the Company is deemed to be both an “Affiliated Person” and may have “Control” of this portfolio company as the Company and/or its affiliated funds collectively owns more than 25% of the portfolio company’s outstanding voting securities or has the power to exercise control over management or policies of such portfolio company (including through a management agreement). The Company’s investment in affiliates for the year ended December 31, 2023 were Arrow Home Health, LLC and Caregility Corporation which represented $9,370,413 of Fair Value and 4.9% of Net Assets of the Company. Transactions related to investments in “Controlled/Affiliate Investments” for the year ended December 31, 2023 were as follows:
[16] Income producing through dividends or distributions.
[17] The interest rate on these loans is subject to 3 month SOFR, which was 5.30% as of March 31, 2024.
[18] The interest rate on these loans is subject to 3 month SOFR, which was 5.33% as of December 31, 2023.
[19] Positions have an aggregate unfunded commitment of $16,702,595 in addition to the amounts shown in the Consolidated Schedule of Investments. See Note 11 “Commitments, Contingencies and Risks” in the accompanying notes to the consolidated financial statements.
[20] Interest disclosed reflects the contractual rate of the First Out tranche under the AAL.
[21] Maturity date is under on-going negotiations with the portfolio company and other lenders, as applicable.
[22] The Company categorized its unitranche loans as First Lien Senior Secured Loans. The First Lien Senior Secured Loan is comprised of two components: a first out tranche (“First Out”) and last out tranche (“Last Out”). The Company syndicates the First Out tranche and retains the Last Out tranche. The First Out and Last Out tranches have the same maturity date. Interest disclosed reflects the contractual rate of First Lien Senior Secured Loan. The First Out tranche has priority as to the Last Out tranche with respect to payments of principal, interest and any amounts due thereunder. The Company may be entitled to receive additional interest as a result of the Agreement Among Lenders (“AAL”) entered into with the First Out lender. In exchange for the higher interest rate, the Last Out portion is at a greater risk of loss.
[23] Positions have an aggregate unfunded commitment of $7,910,936 in addition to the amounts shown in the Consolidated Schedule of Investments. See Note 11 “Commitments, Contingencies and Risks” in the accompanying notes to the consolidated financial statements.
[24] The investment does not accrue payment-in-kind (“PIK”) for the debt investment as of March 31, 2024. See Note 2. “Significant Accounting Policies”.
[25] The investment is on non-accrual status. See Note 2 “Significant Accounting Policies”.
[26] The investment does not accrue PIK for the debt investment as of December 31, 2023. See Note 2. "Significant Accounting Policies".
[27] The Company has received 46 units of incentive shares which have no Cost or Fair Value as of March 31, 2024.
[28] Ownership of certain equity investments may occur through a holding company or partnership.
[29] The Company has received 46 units of incentive shares which have no Cost or Fair Value as of December 31, 2023.
[30] All investments are non-income producing unless otherwise indicated.
[31] The investment includes the fair value and amortized cost of 1,015 shares of common equity issued in conjunction with the preferred equity.