Annual report pursuant to Section 13 and 15(d)

Organization and Basis of Presentation - Additional Information (Detail)

v3.20.1
Organization and Basis of Presentation - Additional Information (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Organization Consolidation And Presentation Of Financial Statements [Abstract]    
Date of incorporation Jul. 13, 2005  
Accumulated deficit $ 198,014 $ 186,629
Cash and cash equivalents 20,703 $ 11,565
Working capital $ 20,000