v3.26.3
Cover
Oct. 21, 2026
Entity Addresses [Line Items]  
Document Type 8-K
Amendment Flag false
Document Period End Date Oct. 21, 2026
Entity File Number 001-43517
Entity Registrant Name FORGE NANO HOLDINGS, INC.
Entity Central Index Key 0002101833
Entity Tax Identification Number 41-2980280
Entity Incorporation, State or Country Code DE
Entity Address, Address Line One 12300 Grant Street
Entity Address, Address Line Two Suite 100
Entity Address, City or Town Thornton
Entity Address, State or Province CO
Entity Address, Postal Zip Code 80241
City Area Code 720
Local Phone Number 259-8579
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Entity Emerging Growth Company true
Elected Not To Use the Extended Transition Period false
Common Stock [Member]  
Entity Addresses [Line Items]  
Title of 12(b) Security Common Stock, par value $0.0001 per share
Trading Symbol NANO
Security Exchange Name NASDAQ
Warrants, each whole warrant exercisable for one share of Common Stock at an exercise price of $11.50 per share  
Entity Addresses [Line Items]  
Title of 12(b) Security Warrants, each whole warrant exercisable for one share of Common Stock at an exercise price of $11.50 per share
Trading Symbol NANOW
Security Exchange Name NASDAQ
Former Address [Member]  
Entity Addresses [Line Items]  
Entity Address, Address Line One ATII Holdings Inc.
Entity Address, Address Line Two 2093 Philadelphia Pike #1968
Entity Address, City or Town Claymont
Entity Address, State or Province DE
Entity Address, Postal Zip Code 19703