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BASIS OF PRESENTATION (Details)
customer in Thousands, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2020
USD ($)
customer
Sep. 30, 2020
USD ($)
segment
customer
Dec. 31, 2019
USD ($)
Product Warranty Liability [Line Items]      
Number of customers (more than) | customer 1 1  
Cash received from the sale of certain accounts receivable $ 35,300 $ 81,100  
Interest expense 300 700  
Liability for product warranties 15,214 15,214 $ 0
Accrued expenses and other 6,700 6,700  
Other long-term liabilities 8,500 8,500  
Restricted cash, current 7,198 $ 7,198 $ 0
Number of operating segments | segment   1  
Tax payment on certain fixed assets      
Product Warranty Liability [Line Items]      
Restricted cash 4,300 $ 4,300  
Restricted short-term bank deposits      
Product Warranty Liability [Line Items]      
Restricted cash $ 2,900 $ 2,900  
Minimum      
Product Warranty Liability [Line Items]      
Product warranty period   1 year  
Maximum      
Product Warranty Liability [Line Items]      
Product warranty period   3 years