v3.20.1

Summary of Significant Accounting Policies - Foreign Currency - Additional Information (Details) | Dec. 31, 2019
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Foreign currency translation and risks |
Rate for translation of balances of financial statements from RMB to US$ | 6.9618

X
- Definition Represents the exchange rate used for convenience translation from reporting currency to additional disclosures in another currency. + References No definition available. + Details
Name: | aacg_ForeignCurrencyTranslationRate
Namespace Prefix: | aacg_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

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