Leases - Schedule of Future Minimum Lease Payments under Non-cancellable Operating Lease Agreements Based On 842 (Details) - CNY (¥) ¥ in Thousands	Dec. 31, 2021	Jan. 01, 2021
Leases [Abstract]
2022	¥ 38,480
2023	27,580
2024	7,981
2025	587
Total undiscounted cash flows	74,628
Less: imputed interest	4,179
Operating lease liabilities current and non-current	70,449	¥ 30,903
Lease liabilities due within one year	35,948
Lease liabilities due after one year	34,501
Short-term lease commitment:
2022	¥ 37,050

Lessee operating lease liability due after one year.

No definition available.

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Data Type:	xbrli:monetaryItemType
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- Definition

Lessee operating lease liability due within one year.

+ References

No definition available.

+ Details

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Namespace Prefix:	rere_
Data Type:	xbrli:monetaryItemType
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- Definition

Lessee operating lease liability payments imputed interest.

+ References

No definition available.

+ Details

Name:	rere_LesseeOperatingLeaseLiabilityPaymentsImputedInterest
Namespace Prefix:	rere_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Short-term lease commitment.

+ References

No definition available.

+ Details

Name:	rere_ShortTermLeaseCommitmentAbstract
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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Short-term lease commitment due next twelve months.

+ References

No definition available.

+ Details

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Namespace Prefix:	rere_
Data Type:	xbrli:monetaryItemType
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- References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Amount of lessee's undiscounted obligation for lease payment for operating lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=123408670&loc=SL77918701-209980

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
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- Definition

Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

+ Details

Name:	us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour
Namespace Prefix:	us-gaap_
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Period Type:	instant

- Definition

Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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- Definition

Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

+ Details

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- Definition

Present value of lessee's discounted obligation for lease payments from operating lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123391704&loc=SL77918627-209977

+ Details

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