Exercise price per share or per unit of warrants or rights outstanding.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480738/235-10-S50-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(h)(4))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-3

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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.

No definition available.

Name:	us-gaap_ClassOfWarrantOrRightLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
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Number of warrants or rights outstanding.

No definition available.

Name:	us-gaap_ClassOfWarrantOrRightOutstanding
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
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Period Type:	instant

The number of share warrants exercisable that may be converted into shares under warrants agreement.

No definition available.

Name:	vani_ClassOfWarrantOrRightExercisableNumber
Namespace Prefix:	vani_
Data Type:	xbrli:sharesItemType
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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of warrants outstanding and currently exercisable under the warrants plan.

No definition available.

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Namespace Prefix:	vani_
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The weighted average remaining contractual term for warrants exercisable, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

Name:	vani_ClassOfWarrantOrRightExercisableWeightedAverageRemainingContractualTerm
Namespace Prefix:	vani_
Data Type:	xbrli:durationItemType
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The number of share warrants exercised during the period.

No definition available.

Name:	vani_ClassOfWarrantOrRightExercisesInPeriod
Namespace Prefix:	vani_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

The weighted average price per share amount at which warrant holders acquired shares when converting their share warrants into shares.

No definition available.

Name:	vani_ClassOfWarrantOrRightExercisesInPeriodWeightedAverageExercisePrice
Namespace Prefix:	vani_
Data Type:	dtr-types:perShareItemType
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The number of shares under warrants that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the warrants agreement or that expired.

No definition available.

Name:	vani_ClassOfWarrantOrRightForfeituresAndExpirationsInPeriod
Namespace Prefix:	vani_
Data Type:	xbrli:sharesItemType
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The weighted average price per share amount of warrants that were either forfeited or expired.

No definition available.

Name:	vani_ClassOfWarrantOrRightForfeituresAndExpirationsWeightedAverageExercisePrice
Namespace Prefix:	vani_
Data Type:	dtr-types:perShareItemType
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The number of share warrants granted during the period.

No definition available.

Name:	vani_ClassOfWarrantOrRightGrantsInPeriod
Namespace Prefix:	vani_
Data Type:	xbrli:sharesItemType
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The weighted average price per share amount at which grantees can acquire shares of common stock by exercise of warrants.

No definition available.

Name:	vani_ClassOfWarrantOrRightGrantsInPeriodWeightedAverageExercisePrice
Namespace Prefix:	vani_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	duration

The weighted average remaining contractual term for warrants outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.