General form of registration statement for all companies including face-amount certificate companies

Redeemable Convertible Preferred Stock - Summary of activity for the Company's redeemable convertible preferred stock issued and outstanding (Detail)

v3.21.2
Redeemable Convertible Preferred Stock - Summary of activity for the Company's redeemable convertible preferred stock issued and outstanding (Detail) - USD ($)
shares in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Temporary Equity [Line Items]    
Beginning Balances $ 171,321  
Conversion of loan for stock   $ 231
Ending Balance 174,568 171,321
Series A Redeemable Convertible Preferred Stock [Member]    
Temporary Equity [Line Items]    
Beginning Balances $ 7,495 $ 7,495
Beginning balance (in shares) 8,652 8,652
Conversion of loan for stock   $ 0
Conversion of loan for stock , Shares   0
Issuance of preferred stock in the sale of Spaceflight, Inc $ 0  
Issuance of preferred stock in the sale of Spaceflight, Inc. Shares 0  
Ending Balance $ 7,495 $ 7,495
Ending balance (in shares) 8,652 8,652
Series B Redeemable Convertible Preferred Stock [Member]    
Temporary Equity [Line Items]    
Beginning Balances $ 21,405 $ 21,405
Beginning balance (in shares) 18,987 18,987
Conversion of loan for stock   $ 0
Conversion of loan for stock , Shares   0
Issuance of preferred stock in the sale of Spaceflight, Inc $ 0  
Issuance of preferred stock in the sale of Spaceflight, Inc. Shares 0  
Ending Balance $ 21,405 $ 21,405
Ending balance (in shares) 18,987 18,987
Series B One Redeemable Convertible Preferred stock [Member]    
Temporary Equity [Line Items]    
Beginning Balances $ 24,138 $ 24,138
Beginning balance (in shares) 9,508 9,508
Conversion of loan for stock   $ 0
Conversion of loan for stock , Shares   0
Issuance of preferred stock in the sale of Spaceflight, Inc $ 0  
Issuance of preferred stock in the sale of Spaceflight, Inc. Shares 0  
Ending Balance $ 24,138 $ 24,138
Ending balance (in shares) 9,508 9,508
Series C Redeemable Convertible Preferred Stock [Member]    
Temporary Equity [Line Items]    
Beginning Balances $ 118,283 $ 82,278
Beginning balance (in shares) 39,824 17,855
Conversion of loan for stock   $ 36,005
Conversion of loan for stock , Shares   21,969
Issuance of preferred stock in the sale of Spaceflight, Inc $ 3,247  
Issuance of preferred stock in the sale of Spaceflight, Inc. Shares 2,084  
Ending Balance $ 121,530 $ 118,283
Ending balance (in shares) 41,908 39,824