Note 9 - Subsequent Events (Details Textual) - Subsequent Event [Member] - USD ($)	Apr. 28, 2020	Apr. 20, 2020
Proceeds from Paycheck Protection Program Under CARES Act		$ 862,000
Revolving Credit Facility [Member]
Debt Instrument, Term (Month)	180 days

The cash inflow received from loan funding under the Paycheck Protection Program which was established under the Coronavirus Aid, Relief and Economic Security (CARES) Act in March 2020.

No definition available.

Name:	relv_ProceedsFromPaycheckProtectionProgramUnderCaresAct
Namespace Prefix:	relv_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration