Revenues and Accounts Receivable - Remaining performance obligation (Details) $ in Thousands	3 Months Ended
Jun. 30, 2020 USD ($)
Remaining performance obligation
Aggregate amount of transaction price allocated to remaining performance obligations	$ 30,235
Upfront payments
Unamortized upfront payments for services	$ 29,281
Amortization period for upfront payments for services	4 years
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-07-01
Remaining performance obligation
Remaining performance obligation, expected period of recognition	5 years

Amount of transaction price allocated to performance obligation that has not been recognized as revenue.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 13
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130556-203045

+ Details

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

- 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
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Period Type:	duration

- Definition

Period in which remaining performance obligation is expected to be recognized as revenue, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 13
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130556-203045

+ Details

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Balance Type:	na
Period Type:	instant

- Definition

Amortization period for upfront payments on services for clients.

+ References

No definition available.

+ Details

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Namespace Prefix:	vrtu_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

+ References

No definition available.

+ Details

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Namespace Prefix:	vrtu_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Refers to unamortized discounts on arrangements for upfront payments for services to clients.

+ References

No definition available.

+ Details

Name:	vrtu_UnamortizedUpFrontPayments
Namespace Prefix:	vrtu_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

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