v3.26.1
Cover
Apr. 10, 2026
Document Type 8-K
Amendment Flag false
Document Period End Date Apr. 10, 2026
Entity File Number 001-39958
Entity Registrant Name TRINITY CAPITAL INC.
Entity Central Index Key 0001786108
Entity Tax Identification Number 35-2670395
Entity Incorporation, State or Country Code MD
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
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Entity Emerging Growth Company false
Common Stock, par value $0.001 per share  
Title of 12(b) Security Common Stock, par value $0.001 per share
Trading Symbol TRIN
Security Exchange Name NASDAQ
7.875% Notes Due 2029  
Title of 12(b) Security 7.875% Notes Due 2029
Trading Symbol TRINZ
Security Exchange Name NASDAQ
Seven Point Eight Seven Five Percentage Notes Due 2029 [Member]  
Title of 12(b) Security 7.875% Notes Due 2029
Trading Symbol TRINI
Security Exchange Name NASDAQ