Annual report pursuant to Section 13 and 15(d)

Nature of Operations - Additional Information (Detail)

v3.3.1.900
Nature of Operations - Additional Information (Detail)
 12 Months Ended
Apr. 11, 2014
$ / shares
shares
Dec. 31, 2015
USD ($)
shares
Dec. 31, 2014
USD ($)
shares
Aug. 31, 2014
shares
Jun. 30, 2013
shares
Nature of Operations [Line Items]          
Number of common shares called by warrants   1,969,250 33,333 162,539 301,778
Common stock, shares outstanding   37,605,134 25,938,332    
Private placement of equity, net proceeds | $   $ 8,402,000 $ 8,402,000    
JB Therapeutics Inc. [Member]          
Nature of Operations [Line Items]          
Conversion of stock, shares issued 9,000,000        
Number of shares converted to common stock 5,964,649        
Number of common shares called by warrants 377,839        
Number of options to purchase shares of common stock 905,334        
Exchange ratio of shares     1.5089    
Common stock, shares outstanding 6,000,000        
Series A Preferred Stock [Member] | JB Therapeutics Inc. [Member]          
Nature of Operations [Line Items]          
Number of common shares called by warrants 917,612        
Minimum [Member] | JB Therapeutics Inc. [Member]          
Nature of Operations [Line Items]          
Common stock warrants, exercise price | $ / shares $ 0.60        
Options exercise price | $ / shares 0.11        
Maximum [Member] | JB Therapeutics Inc. [Member]          
Nature of Operations [Line Items]          
Common stock warrants, exercise price | $ / shares 0.66        
Options exercise price | $ / shares $ 0.17