Transactions with Affiliated Companies (Details)	Mar. 31, 2026	Dec. 31, 2025
Minimum [Member]
Investments Affiliates [Abstract]
Ownership percentage of voting securities required for affiliated company	5.00%
Ownership percentage of voting securities required for controlled affiliate company	25.00%
Caregility Corporation [Member] | Company [Member]
Investments Affiliates [Abstract]
Equity ownership	5.70%	7.90%
Caregility Corporation [Member] | Star Mountain Affiliate Funds [Member]
Investments Affiliates [Abstract]
Equity ownership	28.80%	37.40%
Lasalle Staffing, LLC [Member] | Company [Member]
Investments Affiliates [Abstract]
Equity ownership	5.80%	5.80%
Lasalle Staffing, LLC [Member] | Star Mountain Affiliate Funds [Member]
Investments Affiliates [Abstract]
Equity ownership	21.90%	21.90%
Uncle John's Pride, LLC [Member] | Company [Member]
Investments Affiliates [Abstract]
Equity ownership	5.60%	5.60%
Uncle John's Pride, LLC [Member] | Star Mountain Affiliate Funds [Member]
Investments Affiliates [Abstract]
Equity ownership	18.80%	18.80%
USBid Inc. [Member] | Company [Member]
Investments Affiliates [Abstract]
Equity ownership	13.50%	13.50%
USBid Inc. [Member] | Star Mountain Affiliate Funds [Member]
Investments Affiliates [Abstract]
Equity ownership	57.70%	57.70%
Watt Contracting Holdings, LLC [Member] | Company [Member]
Investments Affiliates [Abstract]
Equity ownership	30.20%
Watt Contracting Holdings, LLC [Member] | Star Mountain Affiliate Funds [Member]
Investments Affiliates [Abstract]
Equity ownership	89.60%
Arrow Home Health LLC (dba Acara Home Health) [Member] | Company [Member]
Investments Affiliates [Abstract]
Equity ownership	2.50%	2.60%
Arrow Home Health LLC (dba Acara Home Health) [Member] | Star Mountain Affiliate Funds [Member]
Investments Affiliates [Abstract]
Equity ownership	72.20%	72.20%
MPUSA, LLC (dba Mission) [Member] | Company [Member]
Investments Affiliates [Abstract]
Equity ownership	4.30%	4.30%
MPUSA, LLC (dba Mission) [Member] | Star Mountain Affiliate Funds [Member]
Investments Affiliates [Abstract]
Equity ownership	34.40%	34.40%
Delva Master Holdings [Member] | Company [Member]
Investments Affiliates [Abstract]
Equity ownership	2.70%	2.70%
Delva Master Holdings [Member] | Star Mountain Affiliate Funds [Member]
Investments Affiliates [Abstract]
Equity ownership	74.50%	74.50%
Microf, LLC [Member] | Company [Member]
Investments Affiliates [Abstract]
Equity ownership	0.00%	0.00%
Microf, LLC [Member] | Star Mountain Affiliate Funds [Member]
Investments Affiliates [Abstract]
Equity ownership	87.10%	77.30%
Watt Acquisition, LLC [Member] | Company [Member]
Investments Affiliates [Abstract]
Equity ownership		30.20%
Watt Acquisition, LLC [Member] | Star Mountain Affiliate Funds [Member]
Investments Affiliates [Abstract]
Equity ownership		89.60%
Affiliated Company [Member] | Advisor's Managed Funds [Member] | Minimum [Member]
Investments Affiliates [Abstract]
Ownership percentage of voting securities required for affiliated company	5.00%	5.00%
Controlled Affiliate Company [Member] | Advisor's Managed Funds [Member] | Minimum [Member]
Investments Affiliates [Abstract]
Equity ownership	25.00%	25.00%