v3.25.1
Cover
May 12, 2025
Document Information [Line Items]  
Document Type 8-K
Document Period End Date Jun. 03, 2025
Entity Registrant Name NET POWER INC.
Entity Incorporation, State or Country Code DE
Entity File Number 001-40503
Entity Tax Identification Number 98-1580612
Entity Address, Postal Zip Code 27701
City Area Code (919)
Local Phone Number 287-4750
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(b) Security Class A Common Stock, par value $0.0001 per share
Trading Symbol NPWR
Security Exchange Name NYSE
Entity Emerging Growth Company true
Entity Ex Transition Period false
Entity Central Index Key 0001845437
Amendment Flag false
Entity Address, Address Line One 320 Roney St.
Entity Address, City or Town Durham
Entity Address, State or Province NC
Warrant  
Document Information [Line Items]  
Title of 12(b) Security Warrants, each exercisable for one share of Class A Common Stock at a price of $11.50
Trading Symbol NPWR WS
Security Exchange Name NYSE