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SIGNIFICANT ACCOUNTING POLICIES - Concentrations of Credit Risks (Details) - Customers - Three Largest Customers
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Revenue Benchmark    
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]    
Concentration risk, percentage 41.00% 96.00%
Accounts Receivable    
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]    
Concentration risk, percentage 58.00% 90.00%