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SHAREHOLDERS' EQUITY (Additional Stock-Based Compensation Data) (Details) - Employee [Member]
$ in Thousands
12 Months Ended
Dec. 31, 2020
USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Unrecognized share-based compensation expense, employees $ 1,304
Compensation costs weighted average period to be recognized 2 years