Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events - Additional Information (Detail)

v3.2.0.727
Subsequent Events - Additional Information (Detail)
 3 Months Ended 6 Months Ended
Jul. 24, 2015
$ / shares
shares
Jul. 14, 2015
USD ($)
Jul. 14, 2015
EUR (€)
Jul. 06, 2015
USD ($)
$ / shares
shares
Jun. 30, 2015
USD ($)
shares
Mar. 31, 2015
shares
Jun. 30, 2014
USD ($)
shares
Jun. 30, 2015
USD ($)
shares
Jun. 30, 2014
USD ($)
shares
Subsequent Event [Line Items]                  
Number of shares, Options exercised | shares         0 0 0 0 0
Research and development expense         $ 1,725,592   $ 1,118,920 $ 3,250,222 $ 2,341,666
Subsequent Event [Member]                  
Subsequent Event [Line Items]                  
Gross proceeds from issuance initial public offering       $ 28,300,000          
Net proceeds from issuance initial public offering       $ 25,800,000          
Subsequent Event [Member] | Cooperation Agreement [Member] | Milestone One [Member]                  
Subsequent Event [Line Items]                  
Research and development expense   $ 48,698 € 43,660            
Subsequent Event [Member] | Cooperation Agreement [Member] | Milestone Two [Member]                  
Subsequent Event [Line Items]                  
Research and development expense   $ 130,301 € 116,820            
Subsequent Event [Member] | IPO [Member]                  
Subsequent Event [Line Items]                  
Stock issued | shares       9,090,909          
Sales of common stock, price per share | $ / shares $ 2.75     $ 2.75          
Number of shares, Options exercised | shares 1,211,827