Capital Stock (Details 7) - $ / shares			1 Months Ended
Nov. 11, 2015	Jun. 10, 2015	Jan. 31, 2015	Mar. 31, 2016
Assumption:
Market Price (in dollars per share)				$ 8.75
Warrants Subject To Exercise Price [Member] \| Pre-Modification [Member]
Assumption:
Market Price (in dollars per share)	$ 6.50	$ 10.00	$ 8.00
Exercise price per share	$ 9.97	$ 30.23	$ 23.13
Risk-free interest rate	1.74%	0.83%	0.04%
Term (Years)	5 years 1 month 17 days	2 years 3 months 4 days	2 months 26 days
Volatility	78.80%	73.70%	69.70%
Dividend rate	0.00%	0.00%	0.00%
Per Share Fair Value of Warrant	$ 3.65	$ 1.55	$ 0.22
Warrants Subject To Exercise Price [Member] \| Post-Modification [Member]
Assumption:
Market Price (in dollars per share)	6.50	10.00	8.00
Exercise price per share	$ 7.00	$ 11.92	$ 13.00
Risk-free interest rate	1.75%	0.83%	0.31%
Term (Years)	5 years 1 month 28 days	2 years 3 months 4 days	1 year 2 months 26 days
Volatility	78.70%	73.70%	69.80%
Dividend rate	0.00%	0.00%	0.00%
Per Share Fair Value of Warrant	$ 4.08	$ 3.79	$ 1.31

No definition available.

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

- Definition

Agreed upon price for the exchange of the underlying asset.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258

+ Details

Name:	us-gaap_FairValueAssumptionsExercisePrice
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Expected dividends to be paid to holders of the underlying shares or financial instruments (expressed as a percentage of the share or instrument's price).

+ References

+ Details

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

- Definition

Period the instrument, asset or liability is expected to be outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

+ Details

Name:	us-gaap_FairValueAssumptionsExpectedTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Measure of dispersion, in percentage terms (for instance, the standard deviation or variance), for a given stock price.

+ References

+ Details

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

- Definition

Risk-free interest rate assumption used in valuing an instrument.

+ References

+ Details

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

- Definition

Price of a single share of a number of saleable stocks of a company.

+ References

No definition available.

+ Details

Name:	us-gaap_SharePrice
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Fair value price of a single share of a number of saleable stocks of a company.

+ References

No definition available.

+ Details

Name:	vtgn_FairValueAssumptionsPerShare
Namespace Prefix:	vtgn_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_StatementEquityComponentsAxis=vtgn_Warrant3Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementScenarioAxis=us-gaap_ScenarioPreviouslyReportedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementScenarioAxis=vtgn_ScenarioPostReportedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: