Quarterly report pursuant to Section 13 or 15(d)

Organization and Description of Business - Additional Information (Detail)

v3.21.2
Organization and Description of Business - Additional Information (Detail)
$ in Thousands
3 Months Ended 6 Months Ended
Jul. 30, 2021
USD ($)
Installments
Jun. 30, 2021
USD ($)
Mar. 31, 2021
USD ($)
Jun. 30, 2020
USD ($)
Mar. 31, 2020
USD ($)
Jun. 30, 2021
USD ($)
Segment
Jun. 30, 2020
USD ($)
Jul. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Class of Stock [Line Items]                  
Number of operating segments | Segment           1      
Net loss   $ 23,222 $ 17,551 $ 10,726 $ 13,088 $ 40,773 $ 23,814    
Cash flows from operating activities           (39,775) $ (22,457)    
Accumulated deficit   (717,631)       (717,631)     $ (676,858)
Cash and cash equivalents and marketable securities   106,100       106,100      
Subsequent Event [Member] | ABW Cyclops SPV LP [Member]                  
Class of Stock [Line Items]                  
Line of credit facility, maximum borrowing capacity               $ 100,000  
Proceeds from Lines of Credit $ 75,000                
Number of funding installments | Installments 3                
Line of credit optional amount of borrowing capacity               $ 25,000  
ATM Offering [Member]                  
Class of Stock [Line Items]                  
Net loss   23,200       40,800      
Cash flows from operating activities           39,800      
Accumulated deficit   $ 717,600       $ 717,600