Hercules Capital, Inc. Annual report [Section 13 and 15(d), not S-K Item 405]

Annual report [Section 13 and 15(d), not S-K Item 405]

Investments - Narrative (Details)

Investments - Narrative (Details)	Dec. 31, 2025 portfolioCompany equityInvestment	Dec. 31, 2024 equityInvestment portfolioCompany
Schedule Of Investments [Line Items]
Percentage of fair value investment in portfolio companies	28.60%	31.60%
Count greater five percent fair value equity \| equityInvestment	2	3
Percentage of equity investments held in portfolio companies	48.40%	49.70%
Concentrations of Credit Risk
Schedule Of Investments [Line Items]
Number of portfolio companies \| portfolioCompany	7	6

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details