v3.20.1

Leases - Summary of Short-term Lease Commitments (Details) | Dec. 31, 2019 CNY (¥)
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Lessee Disclosure [Abstract] |
2020 | ¥ 1,506,677
Short-term lease commitments | ¥ 1,506,677

X
- Definition Short term lease commitment amount for next twelve months. + References No definition available. + Details
Name: | aacg_ShortTermLeaseCommitmentAmountForNextTwelveMonths
Namespace Prefix: | aacg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_LesseeDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of short-term lease commitment. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918705-209980 + Details
Name: | us-gaap_ShortTermLeaseCommitmentAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant