XML 42 R27.htm IDEA: XBRL DOCUMENT v3.8.0.1
Related Parties - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Dec. 31, 2016
Third-Party Investor [Member]          
Related Party Transaction [Line Items]          
Related party transaction amount     $ 109   $ 118
Shin Nippon Biomedical Laboratories Ltd. (“SNBL”) [Member]          
Related Party Transaction [Line Items]          
Payment for contract research services $ 83 $ 4 $ 161 $ 329  
Scientific Advisor [Member] | Consulting Agreement [Member]          
Related Party Transaction [Line Items]          
Consulting agreement termination notice period     14 days    
Consulting service expenses     $ 13