Annual report pursuant to Section 13 and 15(d)

Revenue - Balance Sheet Items Related to FP7 Agreement (Detail)

v3.7.0.1
Revenue - Balance Sheet Items Related to FP7 Agreement (Detail) - USD ($)
Dec. 31, 2016
Dec. 31, 2015
Research and Development Arrangement, Contract to Perform for Others [Line Items]    
Cash (restricted cash) $ 0 $ 17,302
Seventh Research Framework Program (FP7 Agreement) [Member]    
Research and Development Arrangement, Contract to Perform for Others [Line Items]    
Other current assets (receivables from FP7 grant)   980,936
Cash (restricted cash)   17,302
Accounts payable   $ 424,441