v3.20.1

Summary of Significant Accounting Policies - Foreign Currency - Additional Information (Details)	Dec. 31, 2019
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