Annual report pursuant to Section 13 and 15(d)

Subsequent Events - Additional Information (Detail)

v3.7.0.1
Subsequent Events - Additional Information (Detail) - USD ($)
 1 Months Ended 12 Months Ended
Jun. 30, 2017
Jun. 21, 2017
Jun. 14, 2017
Jun. 01, 2017
Jul. 10, 2017
Jun. 30, 2016
May 31, 2017
May 31, 2016
Jun. 19, 2017
Subsequent Event [Line Items]                  
Common Stock issued             149,468,244 123,335,634  
Proceeds from Issuance of Common Stock             $ 8,990,000    
Private Equity Offering                  
Subsequent Event [Line Items]                  
Warrant covering common stock shares purchased, percentage           25.00%      
Exercise price of warrants, per share           $ 1.00      
Warrants to purchase common shares, shares             774,097    
Term of warrants           5 years   5 years  
Minimum | Private Equity Offering                  
Subsequent Event [Line Items]                  
Warrant covering common stock shares purchased, percentage               50.00%  
Exercise price of warrants, per share               $ 0.75  
Maximum | Private Equity Offering                  
Subsequent Event [Line Items]                  
Warrant covering common stock shares purchased, percentage               25.00%  
Exercise price of warrants, per share               $ 1.00  
Subsequent Event                  
Subsequent Event [Line Items]                  
Exercise price of warrants, per share   $ 0.64              
Warrants to purchase common shares, shares   200,000              
Term of warrants   5 years              
Common stock warrant vesting percentage   25.00%              
Subsequent Event | December 31, 2017                  
Subsequent Event [Line Items]                  
Common stock warrant vesting percentage   25.00%              
Subsequent Event | Milestone                  
Subsequent Event [Line Items]                  
Common stock warrant vesting percentage   50.00%              
Subsequent Event | Investor                  
Subsequent Event [Line Items]                  
Exercise price of warrants, per share $ 0.50                
Common Stock issued 3,295,000                
Proceeds from Issuance of Common Stock $ 1,600,000                
Class of warrant or right expiration date Jun. 30, 2017                
Subsequent Event | Investor | Before Inducement                  
Subsequent Event [Line Items]                  
Exercise price of warrants, per share $ 1                
Class of warrant or right expiration date May 31, 2017                
Subsequent Event | Convertible Notes 2017                  
Subsequent Event [Line Items]                  
Exercise price of warrants, per share         $ 1.00        
Warrants to purchase common shares, shares         2,592,326       383,333
Debt Instrument, Face Amount         $ 3,900,000        
Potential number of shares convertible         5,184,661        
Warrant expiration period         5 years        
Placement agent fees         $ 262,000        
Non accountable expense fee         $ 20,000        
Subsequent Event | Convertible Notes 2017 | Private Equity Offering                  
Subsequent Event [Line Items]                  
Exercise price of warrants, per share         $ 0.825        
Warrants to purchase common shares, shares         286,767        
Subsequent Event | Convertible Notes 2017 | Minimum                  
Subsequent Event [Line Items]                  
Warrant covering common stock shares purchased, percentage     25.00%            
Exercise price of warrants, per share     $ 1.00            
Subsequent Event | Convertible Notes 2017 | Maximum                  
Subsequent Event [Line Items]                  
Warrant covering common stock shares purchased, percentage     50.00%            
Exercise price of warrants, per share     $ 1.35            
Directors | Subsequent Event                  
Subsequent Event [Line Items]                  
Stock options granted, shares       450,000          
Stock options granted, exercise price       $ 0.57          
Stock options, term       10 years          
Vesting period       1 year          
Non Employee Director | Subsequent Event | Minimum                  
Subsequent Event [Line Items]                  
Stock options granted, shares       50,000          
Non Employee Director | Subsequent Event | Maximum                  
Subsequent Event [Line Items]                  
Stock options granted, shares       75,000          
Management Employees | Subsequent Event                  
Subsequent Event [Line Items]                  
Stock options granted, shares       800,000          
Stock options granted, exercise price       $ 0.57          
Stock options, term       10 years          
Vesting period       3 years          
Chief Science Officer | Subsequent Event                  
Subsequent Event [Line Items]                  
Stock options granted, shares       600,000          
Stock options granted, exercise price       $ 0.57          
Stock options, term       10 years          
Vesting description       Vest one-third at month six, eighteen and thirty following the grant date.