XML 55 R44.htm IDEA: XBRL DOCUMENT v3.21.1

Concentrations and Revenue Aggregation (Details Narrative)	3 Months Ended		9 Months Ended		12 Months Ended
	Feb. 28, 2021 USD ($) Customer Vendor	Feb. 29, 2020 USD ($) Customer Vendor	Feb. 28, 2021 USD ($) Customer Vendor	Feb. 29, 2020 USD ($) Customer Vendor	May 31, 2020 Customer
Concentrations (Textual)
Amount of FDIC	$ 250,000		$ 250,000
Held in cash	$ 317,895		$ 317,895
Sales Revenue, Net [Member]
Concentrations (Textual)
Number of customers | Customer	1	4	2	3
Concentration risk percentage	17.00%	68.00%	41.00%	48.00%
Sales Revenue, Net [Member] | Outside UNITED STATES [Member]
Concentrations (Textual)
Concentration risk percentage	35.00%	42.00%	22.00%	33.00%
Sales Revenue, Net [Member] | CANADA [Member]
Concentrations (Textual)
Concentration risk percentage	27.00%	41.00%	17.00%	24.00%
Sales Revenue, Net [Member] | Italy [Member]
Concentrations (Textual)
Concentration risk percentage	7.00%		5.00%	8.00%
Sales Revenue, Net [Member] | UK [Member]
Concentrations (Textual)
Concentration risk percentage	1.00%			1.00%
Sales Revenue, Net [Member] | Other [Member]
Concentrations (Textual)
Concentration risk percentage		1.00%
Sales Revenue, Net [Member] | Customer One [Member]
Concentrations (Textual)
Concentration risk percentage	17.00%	21.00%	28.00%	26.00%
Sales Revenue, Net [Member] | Customer Two [Member]
Concentrations (Textual)
Concentration risk percentage		20.00%	13.00%	10.00%
Sales Revenue, Net [Member] | Customer Three [Member]
Concentrations (Textual)
Concentration risk percentage		15.00%		12.00%
Sales Revenue, Net [Member] | Customer Four [Member]
Concentrations (Textual)
Concentration risk percentage		12.00%
Accounts Receivable [Member]
Concentrations (Textual)
Number of customers | Customer			3		1
Concentration risk percentage			91.00%		69.00%
Accounts Receivable [Member] | Customer One [Member]
Concentrations (Textual)
Concentration risk percentage			11.00%		69.00%
Accounts Receivable [Member] | Customer Two [Member]
Concentrations (Textual)
Concentration risk percentage			27.00%
Accounts Receivable [Member] | Customer Three [Member]
Concentrations (Textual)
Concentration risk percentage			44.00%
Vendors [Member]
Concentrations (Textual)
Number of vendors | Vendor	2	1	3	1
Purchased inventories and products	$ 180,626	$ 39,450	$ 241,805	$ 203,916
Percentage of purchases	96.00%	89.00%	84.00%	77.00%
Vendors [Member] | Vendors One [Member]
Concentrations (Textual)
Percentage of purchases	55.00%	89.00%	42.00%	77.00%
Vendors [Member] | Vendors Two [Member]
Concentrations (Textual)
Percentage of purchases	41.00%		27.00%
Vendors [Member] | Vendors Three [Member]
Concentrations (Textual)
Percentage of purchases			15.00%

X

- References

No definition available.

+ Details

Name:	rviv_ConcentrationsTextualAbstract
Namespace Prefix:	rviv_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number of customers.

+ References

No definition available.

+ Details

Name:	rviv_NumberOfCustomers
Namespace Prefix:	rviv_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number of vendors.

+ References

No definition available.

+ Details

Name:	rviv_NumberOfVendors
Namespace Prefix:	rviv_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Percentage of purchases.

+ References

No definition available.

+ Details

Name:	rviv_PercentageOfPurchases
Namespace Prefix:	rviv_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The amount of purchased inventories and products.

+ References

No definition available.

+ Details

Name:	rviv_PurchasedInventoriesAndProducts
Namespace Prefix:	rviv_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Excludes cash and cash equivalents within disposal group and discontinued operation.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 210
-Section 45
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=118262064&loc=SL116631418-115840

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.1)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 210
-Section 45
-Paragraph 21
-URI http://asc.fasb.org/extlink&oid=118262064&loc=SL116631419-115840

+ Details

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

X

- Definition

The amount of cash deposited in financial institutions as of the balance sheet date that is insured by the Federal Deposit Insurance Corporation.

+ References

No definition available.

+ Details

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

X

- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6351-108592

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=118260190&loc=d3e13531-108611

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 21
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118260190&loc=d3e13537-108611

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592

+ Details

Name:	us-gaap_ConcentrationRiskPercentage1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_ConcentrationRiskByBenchmarkAxis=us-gaap_SalesRevenueNetMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_StatementGeographicalAxis=rviv_USMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_StatementGeographicalAxis=rviv_CAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_StatementGeographicalAxis=rviv_ItalyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_StatementGeographicalAxis=rviv_UKMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_StatementGeographicalAxis=rviv_OtherMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_MajorCustomersAxis=rviv_CustomerOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_MajorCustomersAxis=rviv_CustomerTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_MajorCustomersAxis=rviv_CustomerThreeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_MajorCustomersAxis=rviv_CustomerFourMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ConcentrationRiskByBenchmarkAxis=us-gaap_AccountsReceivableMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ConcentrationRiskByBenchmarkAxis=rviv_VendorsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_MajorCustomersAxis=rviv_VendorOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_MajorCustomersAxis=rviv_VendorTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_MajorCustomersAxis=rviv_VendorThreeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: