Hercules Capital, Inc. Quarterly report [Sections 13 or 15(d)]

Quarterly report [Sections 13 or 15(d)]

Investments - Narrative (Details)

Investments - Narrative (Details)	Mar. 31, 2026 equityInvestment portfolioCompany	Dec. 31, 2025 equityInvestment portfolioCompany
Schedule Of Investments [Line Items]
Percentage of fair value investment in portfolio companies	26.20%	28.60%
Count greater five percent fair value equity \| equityInvestment	2	2
Percentage of equity investments held in portfolio companies	49.20%	48.40%
Concentrations of Credit Risk
Schedule Of Investments [Line Items]
Number of portfolio companies \| portfolioCompany	7	7

- 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