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ACCOUNTING POLICIES - Schedule of Domestic and Foreign Break out Percentages (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Accounting Policies [Line Items]    
Revenues $ 17,837 $ 20,605
Net income (loss) (7,058) 659
Property and equipment, net 30,418 41,480
Revenues    
Accounting Policies [Line Items]    
Revenues 17,837 20,605
Net Income (Loss)    
Accounting Policies [Line Items]    
Net income (loss) (7,058) 659
Property, Plant and Equipment    
Accounting Policies [Line Items]    
Property and equipment, net 30,418 41,480
Domestic | Revenues    
Accounting Policies [Line Items]    
Revenues 16,204 19,396
Domestic | Net Income (Loss)    
Accounting Policies [Line Items]    
Net income (loss) (7,082) 769
Domestic | Property, Plant and Equipment    
Accounting Policies [Line Items]    
Property and equipment, net 27,223 38,593
Foreign | Revenues    
Accounting Policies [Line Items]    
Revenues 1,633 1,209
Foreign | Net Income (Loss)    
Accounting Policies [Line Items]    
Net income (loss) 24 (110)
Foreign | Property, Plant and Equipment    
Accounting Policies [Line Items]    
Property and equipment, net $ 3,195 $ 2,887