v3.25.2
Cover
Jul. 09, 2025
Entity Information [Line Items]  
Document Type 8-K
Document Period End Date Jul. 09, 2025
Entity Registrant Name ESS TECH, INC.
Entity Incorporation, State or Country Code DE
Entity File Number 001-39525
Entity Tax Identification Number 98-1550150
Entity Address, Address Line One 26440 SW Parkway Ave.
Entity Address, Address Line Two Bldg. 83
Entity Address, City or Town Wilsonville
Entity Address, State or Province OR
Entity Address, Postal Zip Code 97070
City Area Code 855
Local Phone Number 423-9920
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 false
Entity Central Index Key 0001819438
Amendment Flag false
Common Stock 0.0001 Par Value Per Share  
Entity Information [Line Items]  
Title of 12(b) Security Common Stock, $0.0001 par value per share
Trading Symbol GWH
Security Exchange Name NYSE
Warrants Each Whole Warrant Exercisable For One Share Of Common Stock At An Exercise Price Of 11.50  
Entity Information [Line Items]  
Title of 12(b) Security Warrants, each fifteen warrants exercisable for one share of common stock at an exercise price of $172.50
Trading Symbol GWH.W
Security Exchange Name NYSE