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Stockholders' Equity (Details Textual)				1 Months Ended	3 Months Ended	12 Months Ended
	May 08, 2015 shares	May 22, 2014 shares	May 14, 2010 shares	Jun. 30, 2016 USD ($)	Mar. 31, 2017 plan shares	Dec. 31, 2016 USD ($) $ / shares shares	May 13, 2016 shares
Stockholders' Equity (Textual) [Abstract]
Maximum authorized amount | $				$ 50,000,000.0
Agent fee				2.00%
Stock issued during period (shares)						658,748
Offering price ($ per share) | $ / shares						$ 9.75
Proceeds | $						$ 6,300,000
Number of plans | plan					1
Award vesting period					3 years
Maximum contractual term					10 years
VGX Equity Compensation Plan [Member]
Stockholders' Equity (Textual) [Abstract]
Options outstanding (shares)					386,460
2016 Incentive Plan
Stockholders' Equity (Textual) [Abstract]
Number of potential shares authorized for issuance under share based compensation plan (shares)							2,000,000
Number of shares of unvested restricted stock units and options outstanding (shares)					801,398
Common stock, other shares, outstanding (shares)					907,039
Number of shares authorized (shares)					6,000,000		6,000,000
Number of shares available for grant (shares)					4,291,563
Stock and Cash Based Incentive Plan [Member]
Stockholders' Equity (Textual) [Abstract]
Number of potential shares authorized for issuance under share based compensation plan (shares)			513,833
Number of additional shares authorized (shares)	2,000,000	1,250,000	500,000
Number of shares of unvested restricted stock units (shares)					575,495
Common stock, other shares, outstanding (shares)					6,543,170
Amended 2000 Stock Option Plan [Member]
Stockholders' Equity (Textual) [Abstract]
Options outstanding (shares)					5,000

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Total number of shares of other common stock instruments held by shareholders, such as exchangeable shares. May be all or portion of the number of common shares authorized.

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The cash inflow from the additional capital contribution to the entity.

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