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Equity Financing - Additional Information (Detail)
 1 Months Ended 3 Months Ended
Mar. 31, 2016
USD ($)
$ / shares
shares
Mar. 31, 2016
USD ($)
$ / shares
shares
Class of Warrant or Right [Line Items]    
Proceeds from issuance of stock units | $   $ 7,102,225
Warrant expiration period 2 years  
Term of warrant 5 years  
Proceeds from issuance of warrants | $ $ 7,100,000  
Series A Warrants [Member]    
Class of Warrant or Right [Line Items]    
Number of shares called by warrants 0.50 0.50
Warrant exercise price | $ / shares $ 3.60 $ 3.60
Number of additional warrants issued 166,473  
Series B Warrants [Member]    
Class of Warrant or Right [Line Items]    
Number of shares called by warrants 0.75 0.75
Warrant exercise price | $ / shares $ 5.04 $ 5.04
Number of additional warrants issued 249,709  
Underwritten Public Offering [Member]    
Class of Warrant or Right [Line Items]    
Proceeds from issuance of stock units | $ $ 8,000,000  
Number of stock units issued 2,222,250  
Number of stock units issued, price per share | $ / shares $ 3.60 $ 3.60
Over-Allotment-Option [Member]    
Class of Warrant or Right [Line Items]    
Number of stock units issued 333,338  
Number of shares called by warrants 416,672 416,672
Underwriting option exercise period 45 days