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DISPOSED AND DISCONTINUED OPERATIONS - Statement of Operations for Discontinued Operations (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
DISPOSED AND DISCONTINUED OPERATIONS      
Cost of sales   $ (901)  
Total operating expense $ 620 1,022  
Operating income (loss) from discontinued operations (620) (121)  
Other income (expense) 65 10,895  
Income (loss) from discontinued operations before income taxes (555) 10,774  
Provision (benefit) for income taxes (134) 2,294  
Income (loss) from discontinued operations, net of income taxes $ (421) $ 8,480 $ (38)