    <SEC-DOCUMENT>0001140361-21-003946-index.html : 20210209
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    <ACCEPTANCE-DATETIME>20210209170810
    ACCESSION NUMBER:		0001140361-21-003946
    CONFORMED SUBMISSION TYPE:	8-K
    PUBLIC DOCUMENT COUNT:		29
    CONFORMED PERIOD OF REPORT:	20210204
    ITEM INFORMATION:		Completion of Acquisition or Disposition of Assets
    ITEM INFORMATION:		Unregistered Sales of Equity Securities
    ITEM INFORMATION:		Material Modifications to Rights of Security Holders
    ITEM INFORMATION:		Changes in Registrant's Certifying Accountant
    ITEM INFORMATION:		Changes in Control of Registrant
    ITEM INFORMATION:		Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers
    ITEM INFORMATION:		Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year
    ITEM INFORMATION:		Change in Shell Company Status
    ITEM INFORMATION:		Financial Statements and Exhibits
    FILED AS OF DATE:		20210209
    DATE AS OF CHANGE:		20210209

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			ADVENT TECHNOLOGIES HOLDINGS, INC.
    		CENTRAL INDEX KEY:			0001744494
    		STANDARD INDUSTRIAL CLASSIFICATION:	MISCELLANEOUS ELECTRICAL MACHINERY, EQUIPMENT & SUPPLIES [3690]
    		IRS NUMBER:				830982969
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		8-K
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-38742
    		FILM NUMBER:		21607521

    	BUSINESS ADDRESS:
    		STREET 1:		ONE MIFFLIN PLACE
    		STREET 2:		119 MT AUBURN STREET, SUITE 400
    		CITY:			CAMBRIDGE
    		STATE:			MA
    		ZIP:			02138
    		BUSINESS PHONE:		857-264-7035

    	MAIL ADDRESS:
    		STREET 1:		ONE MIFFLIN PLACE
    		STREET 2:		119 MT AUBURN STREET, SUITE 400
    		CITY:			CAMBRIDGE
    		STATE:			MA
    		ZIP:			02138

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	AMCI Acquisition Corp.
    		DATE OF NAME CHANGE:	20180622
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>8-K
    <SEQUENCE>1
    <FILENAME>nc10019856x1_8k.htm
    <DESCRIPTION>FORM 8-K
    <TEXT>
    Document 1 - file: nc10019856x1_8k.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-3.1
    <SEQUENCE>2
    <FILENAME>nc10019856x1_ex3-1.htm
    <DESCRIPTION>EXHIBIT 3.1
    <TEXT>
    Document 2 - file: nc10019856x1_ex3-1.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-3.2
    <SEQUENCE>3
    <FILENAME>nc10019856x1_ex3-2.htm
    <DESCRIPTION>EXHIBIT 3.2
    <TEXT>
    Document 3 - file: nc10019856x1_ex3-2.htm

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    <DOCUMENT>
    <TYPE>EX-10.5
    <SEQUENCE>4
    <FILENAME>nc10019856x1_ex10-5.htm
    <DESCRIPTION>EXHIBIT 10.5
    <TEXT>
    Document 4 - file: nc10019856x1_ex10-5.htm

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    <TYPE>EX-10.6
    <SEQUENCE>5
    <FILENAME>nc10019856x1_ex10-6.htm
    <DESCRIPTION>EXHIBIT 10.6
    <TEXT>
    Document 5 - file: nc10019856x1_ex10-6.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-10.7
    <SEQUENCE>6
    <FILENAME>nc10019856x1_ex10-7.htm
    <DESCRIPTION>EXHIBIT 10.7
    <TEXT>
    Document 6 - file: nc10019856x1_ex10-7.htm

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    <DOCUMENT>
    <TYPE>EX-10.8
    <SEQUENCE>7
    <FILENAME>nc10019856x1_ex10-8.htm
    <DESCRIPTION>EXHIBIT 10.8
    <TEXT>
    Document 7 - file: nc10019856x1_ex10-8.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-10.9
    <SEQUENCE>8
    <FILENAME>nc10019856x1_ex10-9.htm
    <DESCRIPTION>EXHIBIT 10.9
    <TEXT>
    Document 8 - file: nc10019856x1_ex10-9.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-10.10
    <SEQUENCE>9
    <FILENAME>nc10019856x1_ex10-10.htm
    <DESCRIPTION>EXHIBIT 10.10
    <TEXT>
    Document 9 - file: nc10019856x1_ex10-10.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-10.11
    <SEQUENCE>10
    <FILENAME>nc10019856x1_ex10-11.htm
    <DESCRIPTION>EXHIBIT 10.11
    <TEXT>
    Document 10 - file: nc10019856x1_ex10-11.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-10.12
    <SEQUENCE>11
    <FILENAME>nc10019856x1_ex10-12.htm
    <DESCRIPTION>EXHIBIT 10.12
    <TEXT>
    Document 11 - file: nc10019856x1_ex10-12.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-10.13
    <SEQUENCE>12
    <FILENAME>nc10019856x1_ex10-13.htm
    <DESCRIPTION>EXHIBIT 10.13
    <TEXT>
    Document 12 - file: nc10019856x1_ex10-13.htm

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    <TYPE>EX-10.14
    <SEQUENCE>13
    <FILENAME>nc10019856x1_ex10-14.htm
    <DESCRIPTION>EXHIBIT 10.14
    <TEXT>
    Document 13 - file: nc10019856x1_ex10-14.htm

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    <DOCUMENT>
    <TYPE>EX-10.15
    <SEQUENCE>14
    <FILENAME>nc10019856x1_ex10-15.htm
    <DESCRIPTION>EXHIBIT 10.15
    <TEXT>
    Document 14 - file: nc10019856x1_ex10-15.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-16.1
    <SEQUENCE>15
    <FILENAME>nc10019856x1_ex16-1.htm
    <DESCRIPTION>EXHIBIT 16.1
    <TEXT>
    Document 15 - file: nc10019856x1_ex16-1.htm

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    <DOCUMENT>
    <TYPE>EX-21.1
    <SEQUENCE>16
    <FILENAME>nc10019856x1_ex21-1.htm
    <DESCRIPTION>EXHIBIT 21.1
    <TEXT>
    Document 16 - file: nc10019856x1_ex21-1.htm

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    <DOCUMENT>
    <TYPE>EX-99.1
    <SEQUENCE>17
    <FILENAME>nc10019856x1_ex99-1.htm
    <DESCRIPTION>EXHIBIT 99.1
    <TEXT>
    Document 17 - file: nc10019856x1_ex99-1.htm

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    <TYPE>EX-101.SCH
    <SEQUENCE>18
    <FILENAME>adn-20210204.xsd
    <DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA
    <TEXT>
    Document 18 - file: adn-20210204.xsd

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    <TYPE>EX-101.DEF
    <SEQUENCE>19
    <FILENAME>adn-20210204_def.xml
    <DESCRIPTION>XBRL TAXONOMY EXTENSION DEFINITION LINKBASE
    <TEXT>
    Document 19 - file: adn-20210204_def.xml

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    <DOCUMENT>
    <TYPE>EX-101.LAB
    <SEQUENCE>20
    <FILENAME>adn-20210204_lab.xml
    <DESCRIPTION>XBRL TAXONOMY EXTENSION LABEL LINKBASE
    <TEXT>
    Document 20 - file: adn-20210204_lab.xml

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    <TYPE>EX-101.PRE
    <SEQUENCE>21
    <FILENAME>adn-20210204_pre.xml
    <DESCRIPTION>XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE
    <TEXT>
    Document 21 - file: adn-20210204_pre.xml

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    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>22
    <FILENAME>nc10019856x1_8k_htm.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 22 - file: nc10019856x1_8k_htm.html

    Document 22 - RAW XML: nc10019856x1_8k_htm.xml

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    <SEQUENCE>23
    <FILENAME>R1.htm
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    <TEXT>
    Document 23 - file: R1.htm

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    <TYPE>EXCEL
    <SEQUENCE>24
    <FILENAME>Financial_Report.xlsx
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 24 - file: Financial_Report.xlsx

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    <SEQUENCE>25
    <FILENAME>Show.js
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 25 - file: Show.js

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    <SEQUENCE>26
    <FILENAME>report.css
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 26 - file: report.css

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    <TYPE>XML
    <SEQUENCE>27
    <FILENAME>FilingSummary.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 27 - file: FilingSummary.html

    Document 27 - RAW XML: FilingSummary.xml

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    <TYPE>JSON
    <SEQUENCE>30
    <FILENAME>MetaLinks.json
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 30 - file: MetaLinks.json

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