Consulting service fee monthly payment.

No definition available.

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Namespace Prefix:	rdvt_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Consulting service fee recognized amount.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Renewal term of agreement related party.

+ References

No definition available.

+ Details

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- Definition

Term of agreement related party.

+ References

No definition available.

+ Details

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Namespace Prefix:	rdvt_
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Period Type:	duration

- Definition

Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

+ Details

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Balance Type:	debit
Period Type:	duration

- 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

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

- Definition

Amount of capitalized and expensed compensation cost from equity-based compensation arrangements.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)
-URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901

+ Details

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Balance Type:
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- Details

Name:	us-gaap_RelatedPartyTransactionAxis=rdvt_MDBManagementGroupIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=us-gaap_BoardOfDirectorsChairmanMember
Namespace Prefix:
Data Type:	na
Balance Type:
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- Details

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- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=us-gaap_ExecutiveOfficerMember
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Related party transactions - Additional Information (Details) - USD ($) $ in Thousands			3 Months Ended		9 Months Ended
	Aug. 07, 2018	Apr. 26, 2018	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Related Party Transaction [Line Items]
Share-based compensation amount			$ 353	$ 799	$ 748	$ 2,875
Fluent, Inc.
Related Party Transaction [Line Items]
Allocation of expenses from Fluent			0	961	325	2,849
Share-based compensation amount			0	$ 799	344	$ 2,875
MDB Management Group Inc. [Member] \| Chairman
Related Party Transaction [Line Items]
Consulting service fee monthly payment		$ 30
Term of agreement, related party		6 months
Renewal term of agreement, related party		6 months
Consulting service fee recognized amount			30		90
Services Agreement \| Michael Brauser-Executive Chairman
Related Party Transaction [Line Items]
Consulting service fee monthly payment	$ 30
Term of agreement, related party	1 year
Renewal term of agreement, related party	1 year
Consulting service fee recognized amount			$ 90		$ 90