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Summary of Significant Accounting Policies, Income from grants and related deferred income (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020
Income from Grants and Related Deferred Income [Abstract]
Income from grants	$ 197,420	$ 507,606	$ 85,727	$ 38,453	$ 47,646	$ 16,076	$ 54,828	$ 88,278	$ 829,207	$ 206,828
Deferred income from grants	$ 205,212				$ 341,092				$ 205,212	$ 341,092

X

- Definition

Income earned during the period from non-repayable sum of money awarded to an entity to carry out a specific purpose as provided in grant agreements.

+ References

No definition available.

+ Details

Name:	adn_IncomeFromGrants
Namespace Prefix:	adn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	adn_IncomeFromGrantsAndRelatedDeferredIncomeAbstract
Namespace Prefix:	adn_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of deferred income excluding obligation to transfer product and service to customer for which consideration has been received or is receivable.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section 25
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=28183603&loc=d3e692-112598

+ Details

Name:	us-gaap_DeferredIncome
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant