Cover

v3.24.3
Cover
Dec. 11, 2024
Document Information [Line Items]  
Document Type N-2ASR
Document Registration Statement true
Dividend or Interest Reinvestment Plan Only false
Delayed or Continuous Offering true
Effective Upon Filing, 462(e) true
Additional Securities Effective, 413(b) false
Effective when Declared, Section 8(c) false
Approximate Date of Commencement of Proposed Sale to Public From time to time after the effective date of this Registration Statement
Amendment Flag false
Entity Information [Line Items]  
Entity Registrant Name Hercules Capital, Inc.
Entity Central Index Key 0001280784
Securities Act File Number 333-000000
Entity Well-known Seasoned Issuer Yes
Entity Emerging Growth Company false
Entity Inv Company Type N-2
Entity Contact Personnel [Line Items]  
Entity Address, Address Line One 1 N B Street
Entity Address, Address Line Two Suite 2000
Entity Address, City or Town San Mateo
Entity Address, State or Province CA
Entity Address, Postal Zip Code 94401
Entity Phone Fax Numbers [Line Items]  
City Area Code 650
Local Phone Number 289-3060
Business Contact [Member]  
Entity Contact Personnel [Line Items]  
Contact Personnel Name Scott Bluestein
Entity Address, Address Line One 1 N B Street
Entity Address, Address Line Two Suite 2000
Entity Address, City or Town San Mateo
Entity Address, State or Province CA
Entity Address, Postal Zip Code 94401