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Stockholders' Equity (Details Textual)
1 Months Ended 9 Months Ended
May 08, 2015
shares
May 05, 2015
USD ($)
$ / shares
shares
May 22, 2014
shares
May 14, 2010
shares
Jun. 30, 2016
USD ($)
Sep. 30, 2016
USD ($)
plan
$ / shares
shares
Sep. 30, 2015
USD ($)
May 13, 2016
shares
Stockholders' Equity (Textual) [Abstract]                
Maximum authorized amount | $         $ 50,000,000.0      
Agent fee         2.00%      
Stock issued during period (shares)   10,925,000       568,248    
Offering price ($ per share) | $ / shares   $ 8.00       $ 9.80    
Proceeds | $           $ 5,458,284 $ 81,902,363  
Proceeds from initial public offering | $   $ 81,900,000            
Number of plans | plan           2    
Award vesting period           3 years    
Maximum contractual term           10 years    
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 authorized (shares)               6,000,000
Stock and Cash Based Incentive Plan [Member]                
Stockholders' Equity (Textual) [Abstract]                
Number of additional shares authorized (shares) 2,000,000   1,250,000 500,000        
Number of potential shares authorized for issuance under share based compensation plan (shares)       513,833        
Number of shares authorized (shares)           7,770,497    
Number of shares available for grant (shares)           322,727    
Number of shares of unvested restricted stock units and options outstanding (shares)           771,335    
Common stock, other shares, outstanding (shares)           5,910,921    
Amended 2000 Stock Option Plan [Member]                
Stockholders' Equity (Textual) [Abstract]                
Options outstanding (shares)           100,002    
VGX Equity Compensation Plan [Member]                
Stockholders' Equity (Textual) [Abstract]                
Options outstanding (shares)           737,038    
Over-Allotment Option [Member]                
Stockholders' Equity (Textual) [Abstract]                
Stock issued during period (shares)   1,425,000