Registration statement for securities of certain foreign private issuers

Summary of Significant Accounting Policies - Additional Information (Detail)

v3.21.2
Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($)
 12 Months Ended
Dec. 10, 2020
Oct. 01, 2020
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Accounting Policies [Line Items]          
Impairment of long lived assets held for use     $ 496,000 $ 0  
Proceeds from redeemable convertible preferred stock     8,934,000 161,233,000 $ 0
Reduction in revenue     14,800,000    
Performance obligations transaction price     11,000,000    
Severance pay expense     2,000,000 1,700,000 $ 1,100,000
Deferred offering costs non current     374,000 0  
Contract with customers liability recognized     283,000    
Deferred Revenue     3,500,000 $ 3,500,000  
Collective Growth Corp [Member]          
Accounting Policies [Line Items]          
Federal depository insurance coverage | $     $ 250,000    
Collective Growth Corp [Member] | Private Placement [Member]          
Accounting Policies [Line Items]          
Purchanse an aggregate shares | shares     9,506,250    
Section Four Hundred And One K Plan [Member]          
Accounting Policies [Line Items]          
Employer matching contribution percentage     4.00% 4.00% 4.00%
Employer matching contribution to retirement plan amount     $ 14,000 $ 31,000 $ 9,000
Memorandum Of Understanding With Magna International [Member]          
Accounting Policies [Line Items]          
Advances from customers and deferred revenues     $ 736,000    
Israel [Member]          
Accounting Policies [Line Items]          
Severance pay percentage of monthly salary contribution to the fund     8.33%    
In Case Registered As Public Company [Member] | Performance Based Milestone [Member] | Performance Based Agreement With Magna [Member]          
Accounting Policies [Line Items]          
Class of warrants or rights or rights excercisable into shares issuable in the future 7,023,865        
Series C One Redeemable Convertible Preferred Shares [Member]          
Accounting Policies [Line Items]          
Temporary equity shares issued during the period new issues   943,148 2,699,114    
Proceeds from redeemable convertible preferred stock   $ 8,934,000      
Series C One Redeemable Convertible Preferred Shares [Member] | Memorandum Of Understanding With Magna International [Member]          
Accounting Policies [Line Items]          
Temporary equity shares issued during the period new issues 1,755,966        
Proceeds from redeemable convertible preferred stock $ 0        
Series C One Redeemable Convertible Preferred Shares [Member] | In Case Not Registered As A Public Company [Member] | Performance Based Milestone [Member] | Performance Based Agreement With Magna [Member]          
Accounting Policies [Line Items]          
Class of warrants or rights or rights excercisable into shares issuable in the future 4,939,922