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Other current liabilities, Movement of Provision for Unused Vacation (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020
Provision for Unused Vacation [Roll Forward] |  |
Balance at beginning of year | $ 5,269 | $ 11,158
Assumed at business combination | 790,538 | 0
Additions during the year | 120,064 | 0
Income from unused provisions during the year | 0 | (6,442)
Utilized provisions during the year | (462,808) | 0
Exchange differences | (29,275) | 553
Balance at end of year | $ 423,788 | $ 5,269

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- Definition The amount of income from unused provisions during the year. + References No definition available. + Details
Name: | adn_IncomeFromUnusedProvisions
Namespace Prefix: | adn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition The amount of provision for unused vacation of additions during the year. + References No definition available. + Details
Name: | adn_ProvisionForUnusedVacationAdditions
Namespace Prefix: | adn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition The amount of provision for unused vacation assumed at business combination. + References No definition available. + Details
Name: | adn_ProvisionForUnusedVacationAssumedAtBusinessCombination
Namespace Prefix: | adn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount of exchange differences. + References No definition available. + Details
Name: | adn_ProvisionForUnusedVacationExchangeDifferences
Namespace Prefix: | adn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
Name: | adn_ProvisionForUnusedVacationRollForward
Namespace Prefix: | adn_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The amount of utilized provisions from unused vacation during the period. + References No definition available. + Details
Name: | adn_UnusedVacationUtilizedProvisions
Namespace Prefix: | adn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Carrying value as of the balance sheet date of obligations incurred and payable for unused vacation time owed to employees based on the entity's vacation benefit given to its employees. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.20) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 710 -SubTopic 10 -Section 25 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6409733&loc=d3e19396-108361 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=124098289&loc=d3e6911-107765 + Details
Name: | us-gaap_AccruedVacationCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant