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v3.20.2

Subsequent Events (Details) - Subsequent Event [Member] - President And Chief Executive Officer [Member] | 1 Months Ended
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Oct. 31, 2020
Subsequent Event [Line Items] |
Agreement auto renewal period | 2 years
Agreement non renewal period | 60 days

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- Definition Represents the information pertaining to agreement to auto renewal period. + References No definition available. + Details
Name: | adc_AgreementAutoRenewalPeriod
Namespace Prefix: | adc_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Represents the information pertaining to agreement non renewal period. + References No definition available. + Details
Name: | adc_AgreementNonRenewalNoticePeriod
Namespace Prefix: | adc_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_TitleOfIndividualAxis=adc_PresidentAndChiefExecutiveOfficerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |