Annual report pursuant to Section 13 and 15(d)

Annual report pursuant to Section 13 and 15(d)

Class A Redeemable Convertible Preferred Stock (Detail)

v3.20.4
Class A Redeemable Convertible Preferred Stock (Detail) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Jun. 25, 2018
Jun. 24, 2018
Dec. 22, 2016
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 30, 2015
Temporary Equity [Line Items]                  
Redemption of preferred stock       $ 0 $ 0 $ 50,096      
Gain on redemption of preferred stock $ 9,100     $ 0 $ 0 $ 9,075      
Series A Redeemable Convertible Preferred Stock                  
Temporary Equity [Line Items]                  
Preferred stock, shares issued                 14,666,667
Preferred stock, par value (in dollars per share)     $ 7,500,000           $ 7.50
Preferred stock, liquidation preference                 $ 110,000
Preferred stock, shares, redemption     8,066,667            
Preferred stock, redemption amount     $ 55,000            
Preferred stock redemption price per share (in dollars per share) $ 7.30   $ 6,820,000            
Preferred stock, redemption discount 4.55%   9.09%            
Preferred stock, shares outstanding       0 0 0 6,864,000    
Redemption of preferred stock $ 50,100                
Preferred stock, redemption price, accrued and unpaid dividends, addition price per share $ 0.14                
Preferred stock, carrying amount attributable to parent   $ 37,800              
Preferred stock, recognized amount of beneficial conversion feature   $ 21,300              
Preferred stock, liquidation amount at redemption               $ 100,000  
Series A Redeemable Convertible Preferred Stock | Payment In Kind                  
Temporary Equity [Line Items]                  
Preferred stock, shares issued             264,000