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Document and Entity Information
Feb. 18, 2021
Entity Listings [Line Items]  
Document Type 8-K
Amendment Flag false
Document Period End Date Feb. 18, 2021
Entity Registrant Name Advent Technologies Holdings, Inc.
Entity Incorporation, State or Country Code DE
Entity File Number 001-38742
Entity Tax Identification Number 83-0982969
Entity Address, Address Line One 200 Clarendon Street
Entity Address, City or Town Boston
Entity Address, State or Province MA
Entity Address, Postal Zip Code 02116
City Area Code 857
Local Phone Number 264-7035
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 0001744494
Common Stock [Member]  
Entity Listings [Line Items]  
Title of 12(b) Security Common stock, par value $0.0001 per share
Trading Symbol ADN
Security Exchange Name NASDAQ
Warrants to purchase one share of common stock, each at an exercise price of $11.50 [Member]  
Entity Listings [Line Items]  
Title of 12(b) Security Warrants to purchase one share of common stock, each at an exercise price of $11.50
Trading Symbol ADNWW
Security Exchange Name NASDAQ