Annual report pursuant to Section 13 and 15(d)

Related Party Transactions - Additional Information (Detail)

v3.7.0.1
Related Party Transactions - Additional Information (Detail) - USD ($)
 1 Months Ended 12 Months Ended
May 10, 2016
Jun. 23, 2015
Jun. 30, 2016
May 31, 2017
May 31, 2016
Jan. 19, 2016
May 31, 2015
Feb. 06, 2015
Sep. 26, 2014
Private Equity Offering                  
Related Party Transaction [Line Items]                  
Proceeds from private equity offering     $ 729,500   $ 37,600,000        
Shares of common stock sold at private equity offering     729,500   48,659,338        
Warrants to purchase common shares, shares       774,097          
Exercise price of warrants, per share     $ 1.00            
Alpha Venture Capital Partners, L.P. | 3-Month Unsecured Convertible Promissory Note                  
Related Party Transaction [Line Items]                  
Convertible note, face amount             $ 1,500,000 $ 1,500,000  
Alpha Venture Capital Partners, L.P. | 2-Year Unsecured Convertible Promissory Note                  
Related Party Transaction [Line Items]                  
Convertible note, face amount             $ 2,000,000   $ 2,000,000
Alpha Venture Capital Partners, L.P. | AVCP Convertible Notes                  
Related Party Transaction [Line Items]                  
Common stock issued upon conversion of notes   5,237,966              
Alpha Venture Capital Partners, L.P. | AVCP Convertible Notes | Additional 5-year Warrant                  
Related Party Transaction [Line Items]                  
Common stock issued upon conversion of notes   1,000,000              
Exercise price of warrants, per share   $ 0.675              
Denis R. Burger, Ph.D | Consulting Agreement                  
Related Party Transaction [Line Items]                  
Compensation payable per month           $ 20,000      
Jordan G. Naydenov | Private Equity Offering                  
Related Party Transaction [Line Items]                  
Proceeds from private equity offering $ 1,000,000                
Shares of common stock sold at private equity offering 1,000,000                
Warrants to purchase common shares, shares 250,000                
Exercise price of warrants, per share $ 1.35                
Anthony D Caracciolo                  
Related Party Transaction [Line Items]                  
Warrants to purchase common shares, shares       333,333          
Exercise price of warrants, per share       $ 1.35          
Anthony D Caracciolo | Short Term Convertible Promissory Notes                  
Related Party Transaction [Line Items]                  
Proceeds from private equity offering       $ 1,000,000          
Purchased short term convertible promissory note interest       7.00%