Represents the amount of allowance for loans provided to related parties.

No definition available.

Name:	og_AllowanceForLoansProvidedToRelatedParties
Namespace Prefix:	og_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Represents the disposal of long-term investments and loan receivables included in amounts due from related parties in noncash investing and financing activities.

+ References

No definition available.

+ Details

Name:	og_DisposalOfLongTermInvestmentsAndLoanReceivablesIncludedInAmountsDueFromRelatedParties
Namespace Prefix:	og_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Represents the annual interest rate of related party loan.

+ References

No definition available.

+ Details

Name:	og_RelatedPartyTransactionAnnualInterestRate
Namespace Prefix:	og_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

The percentage of compounded monthly interest rate

+ References

No definition available.

+ Details

Name:	og_RelatedPartyTransactionCompoundedMonthlyInterestRate
Namespace Prefix:	og_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the maturity term of related party loan.

+ References

No definition available.

+ Details

Name:	og_RelatedPartyTransactionMaturityTerm
Namespace Prefix:	og_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the total loans pertaining to related party transaction.

+ References

No definition available.

+ Details

Name:	og_RelatedPartyTransactionTermLoan
Namespace Prefix:	og_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The cash outflow associated with extending a long-term loan to a related party. Alternate caption: Payments for Advances to Affiliates.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3213-108585

+ Details

Name:	us-gaap_PaymentsToFundLongtermLoansToRelatedParties
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash inflow associated with collection, whether partial or full, of long-term loans to a related party. Alternate caption: Proceeds from Advances to Affiliates.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3179-108585

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

+ Details

Name:	us-gaap_ProceedsFromCollectionOfLongtermLoansToRelatedParties
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash inflow associated with the sale of equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3179-108585

+ Details

Name:	us-gaap_ProceedsFromSaleOfEquityMethodInvestments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_RelatedPartyTransactionLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=og_YiXinMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementScenarioAxis=og_IfLoanIsRepaidWithinOneYearScenarioOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementScenarioAxis=og_IfLoanIsRepaidAfterOneYearFromDrawDownScenarioTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=og_ZiJunMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=og_ExplorerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=og_GuangzhouPanhaiTechnologyCo.LtdMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=og_GuangzhouRaspberryTechnologyCo.LtdMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=og_AlnilamMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=og_PanHaiMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=og_JunMiMember
Namespace Prefix:
Data Type:	na
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Related Party Transactions - Additional Information (Details) ¥ in Thousands, $ in Thousands	1 Months Ended	12 Months Ended
	Oct. 31, 2020 CNY (¥)	Dec. 31, 2021 CNY (¥)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 CNY (¥)	Dec. 31, 2019 CNY (¥)	Dec. 31, 2021 USD ($)
Related Party Transaction [Line Items]
Allowance for doubtful accounts on outstanding loan balances		¥ (56)	$ (9)	¥ 2,651	¥ 3,400
Repayments of loan principal		2,220	348	12,555	3,603
Loans provided		250	39	33,558	12,985
Investment and loans receivable disposal transactions				3,152
Carrying amount of investment				3,152
Yi Xin
Related Party Transaction [Line Items]
Total loans				8,600
Allowance for doubtful accounts on outstanding loan balances				399
Repayments of loan principal				1,000	2,000
Proceeds from disposal of equity interest	¥ 7,201
Loans provided				8,600	3,400
Investment and loans receivable disposal transactions				3,000
Carrying amount of investment				¥ 3,000
Yi Xin \| If the loan is repaid within one year
Related Party Transaction [Line Items]
Annual interest rate				4.5
Maturity term				1 year
Yi Xin \| If the loan is repaid after one year from draw down
Related Party Transaction [Line Items]
Annual interest rate				4.75
Maturity term				1 year
Zi Jun
Related Party Transaction [Line Items]
Total loans				¥ 18,618
Loans provided				¥ 18,618	3,736
Zi Jun \| If the loan is repaid within one year \| Minimum
Related Party Transaction [Line Items]
Annual interest rate				4.5
Zi Jun \| If the loan is repaid after one year from draw down \| Maximum
Related Party Transaction [Line Items]
Annual interest rate				4.75
Explorer
Related Party Transaction [Line Items]
Total loans				¥ 3,960
Annual interest rate				5
Maturity term				2 years
Repayments of loan principal				¥ 3,960
Loans provided				3,960
Pan Hai.
Related Party Transaction [Line Items]
Total loans				¥ 1,500
Annual interest rate				4.5
Loans provided				¥ 1,500
GZ Raspberry
Related Party Transaction [Line Items]
Total loans		250				$ 39
Repayments of loan principal		¥ 250	$ 39
Compounded monthly interest rate		0.417%	0.417%
Loans provided		¥ 250	$ 39
Alnilam
Related Party Transaction [Line Items]
Repayments of loan principal				7,185	1,603
Loans provided					¥ 5,649
Pan Hai
Related Party Transaction [Line Items]
Repayments of loan principal		1,500	235
Jun Mi
Related Party Transaction [Line Items]
Repayments of loan principal		¥ 470	$ 74	410
Loans provided				880
Investment and loans receivable disposal transactions				152
Carrying amount of investment				¥ 152