Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Taxes on Income - Additional Information (Detail)

v3.21.1
Taxes on Income - Additional Information (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Income Tax Disclosure [Line Items]        
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent 23.00% 23.00% 23.00% 21.00%
Foreign Income Tax Rate Differential     37.50%  
Tax Deduction Percent     13.125%  
Operating Loss Carryforwards $ 161,000      
Unrecognized Tax Benefits $ 0 $ 0    
Maximum [Member]        
Income Tax Disclosure [Line Items]        
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent     35.00%  
Minimum [Member]        
Income Tax Disclosure [Line Items]        
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent     21.00%  
Tax Year 2016 [Member]        
Income Tax Disclosure [Line Items]        
Year under Income Tax Examination 2016      
Tax Year 2018 [Member]        
Income Tax Disclosure [Line Items]        
Year under Income Tax Examination 2018      
Israel Tax Authority [Member]        
Income Tax Disclosure [Line Items]        
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent     23.00%