Quarterly report pursuant to Section 13 or 15(d)

Organization and Description of Business - Additional Information (Detail)

v3.20.1
Organization and Description of Business - Additional Information (Detail)
$ in Thousands
3 Months Ended
Mar. 31, 2020
USD ($)
Segment
Mar. 31, 2019
USD ($)
Dec. 31, 2019
USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract]      
Number of operating segments | Segment 1    
Net loss $ (13,088) $ (23,075)  
Cash flows from operating activities (14,708) $ (22,394)  
Accumulated deficit (638,960)   $ (625,872)
Cash and cash equivalents and marketable securities $ 176,200