v3.25.2
Cover
Oct. 01, 2025
Cover [Abstract]  
Document Type 8-K
Document Period End Date Oct. 01, 2025
Entity Registrant Name BUTLER NATIONAL CORPORATION
Entity Incorporation, State or Country Code KS
Entity File Number 0-1678
Entity Tax Identification Number 41-0834293
Entity Address, Address Line One One Aero Plaza
Entity Address, City or Town New Century
Entity Address, State or Province KS
Entity Address, Postal Zip Code 66031
City Area Code 913
Local Phone Number 780-9595
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Entity Emerging Growth Company false
Amendment Flag false
Entity Central Index Key 0000015847