Quarterly report pursuant to Section 13 or 15(d)

Revision of Prior Period Financial Statements - Summary of Restatement of Statement of Equity (Detail)

v3.21.1
Revision of Prior Period Financial Statements - Summary of Restatement of Statement of Equity (Detail) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Mar. 31, 2020
Dec. 31, 2019
Restatement [Line Items]        
Shareholders' equity total $ 29,511 $ 47,329 $ 118,175 $ 352,473
Previously Reported [Member]        
Restatement [Line Items]        
Deficit accumulated (720,629)      
Shareholders' equity total 50,842 50,842    
Adjustment [Member]        
Restatement [Line Items]        
Deficit accumulated (3,513)      
Shareholders' equity total (3,513) (3,513)    
Restated [Member]        
Restatement [Line Items]        
Deficit accumulated (724,142)      
Shareholders' equity total $ 47,329 $ 47,329