XML 36 R26.htm IDEA: XBRL DOCUMENT v3.5.0.2
Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($)
9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Dec. 31, 2015
Summary Of Significant Accounting Policies [Line Items]      
Transfers between Levels 1, 2 and 3 $ 0 $ 0  
IPR&D [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Impairment of intangible assets 0 $ 0  
Cash Deposits [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Cash and cash equivalents, fair value 30,204,000    
Money Market Funds [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Cash and cash equivalents, fair value 7,790,000    
Quoted Prices in Active Markets (Level 1) [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Assets, fair value disclosure, recurring 0   $ 0
Liabilities, fair value disclosure, recurring 0   0
Significant Other Observable Inputs (Level 2) [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Assets, fair value disclosure, recurring 0   0
Liabilities, fair value disclosure, recurring 0   0
Significant Unobservable Inputs (Level 3) [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Assets, fair value disclosure, recurring 0   0
Liabilities, fair value disclosure, recurring $ 0   $ 0