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CONDENSED FINANCIAL INFORMATION OF THE PARENT COMPANY - Additional Information (Details)	Dec. 31, 2021
VIE | Maximum
Condensed financial information of the parent company
Percent of consolidated net assets	25.00%

X

- Definition

The parent entity's of the subsidiary, expressed as a percentage.

+ References

No definition available.

+ Details

Name:	rcon_OwnershipPercentageByParent
Namespace Prefix:	rcon_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- 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:	srt_CondensedBalanceSheetStatementsCaptionsLineItems
Namespace Prefix:	srt_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	srt_ConsolidatedEntitiesAxis=us-gaap_VariableInterestEntityPrimaryBeneficiaryMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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