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INCOME TAX (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 22, 2017
Dec. 21, 2017
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Effective income tax rate     98.00% 50.00% (54.00%) 113.00% (75.00%)
Federal corporate income rate 21.00% 35.00%     21.00% 21.00% 21.00%
Global Intangible Low-Taxed Income           $ 3,982  
Net operating loss carry forwards for federal and state income tax purposes         $ 59,000 $ 24,500 $ 22,900
Excess tax benefits from share-based compensation         $ 10,537    
ISRAEL              
Effective income tax rate         23.00% 23.00% 23.00%