XML 20 R37.htm IDEA: XBRL DOCUMENT v3.3.0.814
Stockholders' Equity - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended
Feb. 28, 2015
Sep. 30, 2015
Dec. 31, 2014
Stockholders Equity Note      
Proceeds from issuance of common stock and warrants, net of issuance cost $ 10,900    
Stock and warrant issuance costs 100    
Shares issuable upon exercise (shares)   10,034,099  
Warrant liability $ 5,100 $ 3,273 $ 0
July 2025      
Stockholders Equity Note      
Warrant exercise price (USD per share)   $ 1.64  
Shares issuable upon exercise (shares)   152,440  
Common Stock      
Stockholders Equity Note      
Warrants issued (in shares) 3,021,977    
Warrant exercise price (USD per share) $ 1.82    
Number of securities called by each warrant 0.5    
Period in which warrants become exercisable 6 months 1 day    
Warrant expiration period 7 years    
Common Stock      
Stockholders Equity Note      
Issuance of common stock (shares) 6,043,955