Document And Entity Information
Mar. 30, 2022
Document Information [Line Items]  
Entity, Registrant Name BRIDGELINE DIGITAL, INC.
Document, Type 8-K
Document, Period End Date Mar. 30, 2022
Entity, Incorporation, State or Country Code DE
Entity, File Number 001-33567
Entity, Tax Identification Number 52-2263942
Entity, Address, Address Line One 100 Sylvan Road, Suite G700
Entity, Address, City or Town Woburn
Entity, Address, State or Province MA
Entity, Address, Postal Zip Code 01801
City Area Code 781
Local Phone Number 376-5555
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(b) Security Common Stock
Trading Symbol BLIN
Security Exchange Name NASDAQ
Entity, Emerging Growth Company false
Amendment Flag false
Entity, Central Index Key 0001378590