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RESTRICTED NET ASSETS (Details) ¥ in Thousands, $ in Thousands	Dec. 31, 2023 CNY (¥)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 CNY (¥)
RESTRICTED NET ASSETS
Minimum percentage of after-tax profit allocated to general reserve fund for PRC entities	10.00%	10.00%
Maximum percentage criteria for appropriation of after-tax profit of Chinese subsidiaries to general reserve fund for PRC entities	50.00%	50.00%
Amount transferred to PRC statutory reserve funds	¥ 8,164	$ 1,150	¥ 7,967
Net assets subject to restriction	¥ 281,738	$ 39,682
Percentage of restricted investments	29.41%	29.41%

X

- Definition

Represents the amount transferred to PRC statutory reserve funds as of balance sheet date.

+ References

No definition available.

+ Details

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Namespace Prefix:	ih_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Represents the maximum percentage criteria expressed as a percentage of registered capital for the transfer of after-tax profit by subsidiaries in China to a general reserve fund for PRC entities. If the reserve fund exceeds the specified threshold of the registered capital, further appropriation is not required.

+ References

No definition available.

+ Details

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Namespace Prefix:	ih_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Represents the minimum percentage of after-tax profit transferred by PRC subsidiaries to general reserve fund.

+ References

No definition available.

+ Details

Name:	ih_MinimumPercentageOfAfterTaxProfitAllocatedToGeneralReserveFundForPrcEntities
Namespace Prefix:	ih_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The percentage of net assets of the aggregate value of all restricted investments.

+ References

No definition available.

+ Details

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Namespace Prefix:	ih_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Restricted Net Assets [Abstract]

+ References

No definition available.

+ Details

Name:	ih_RestrictedNetAssetsAbstract
Namespace Prefix:	ih_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of restricted net assets of consolidated and unconsolidated subsidiaries as of the end of the most recently completed fiscal year.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(e)(3)(ii))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480678/235-10-S99-1

+ Details

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