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Document And Entity Information
May 04, 2023
Document Information [Line Items]  
Document Type 8-K
Amendment Flag false
Document Period End Date May 04, 2023
Entity Registrant Name TRINITY CAPITAL INC.
Entity Central Index Key 0001786108
Entity Emerging Growth Company true
Securities Act File Number 001-39958
Entity Incorporation, State or Country Code MD
Entity Tax Identification Number 35-2670395
Entity Address, Address Line One 1 N. 1st Street
Entity Address, Address Line Two Suite 302
Entity Address, City or Town Phoenix
Entity Address, State or Province AZ
Entity Address, Postal Zip Code 85004
City Area Code (480)
Local Phone Number 374-5350
Entity Information, Former Legal or Registered Name Not Applicable
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Entity Ex Transition Period false
Common Stock, par value $0.001 per share  
Document Information [Line Items]  
Title of 12(b) Security Common Stock, par value $0.001 per share
Trading Symbol TRIN
Security Exchange Name NASDAQ
7.00% Notes due 2025  
Document Information [Line Items]  
Title of 12(b) Security 7.00% Notes Due 2025
Trading Symbol TRINL
Security Exchange Name NASDAQ