v3.22.2.2
Cover
Sep. 13, 2022
Document Information [Line Items]  
Document Type 8-K
Document Period End Date Sep. 13, 2022
Entity Registrant Name Heliogen, Inc.
Entity Incorporation, State or Country Code DE
Entity File Number 001-40209
Entity Tax Identification Number 85-4204953
Entity Address, Address Line One 130 West Union Street
Entity Address, City or Town Pasadena
Entity Address, State or Province CA
Entity Address, Postal Zip Code 91103
City Area Code 626
Local Phone Number 720-4530
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Entity Emerging Growth Company true
Entity Ex Transition Period true
Entity Central Index Key 0001840292
Amendment Flag false
Common Stock  
Document Information [Line Items]  
Title of 12(b) Security Common stock, $0.0001 par value per share
Trading Symbol HLGN
Security Exchange Name NYSE
Warrant  
Document Information [Line Items]  
Title of 12(b) Security Warrants, each whole warrant exercisable for shares of Common stock at an exercise price of $11.50 per share
Trading Symbol HLGN.W
Security Exchange Name NYSE