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Unaudited Condensed Consolidated Statements of Changes in Equity (Parentheticals)	6 Months Ended
	Jun. 30, 2022
Statement of Stockholders' Equity [Abstract]
Purchase of noncontrolling interest	30.00%

X

- Definition

Percentage of purchase of noncontrolling interest.

+ References

No definition available.

+ Details

Name:	reto_PurchaseOfNoncontrollingInterest
Namespace Prefix:	reto_
Data Type:	dtr:percentItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

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