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Note 3 - Related Parties (Details Textual) $ in Millions	Mar. 31, 2019 USD ($)
Nutracom, LLC [Member]
Purchase Obligation, Total	$ 1.3

Minimum amount of purchase arrangement in which the entity has agreed to expend funds to procure goods or services from a supplier.

No definition available.

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

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