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CONTINGENT LIABILITIES (Brazilian Federal Communication Agency - Anatel) (Details)
 1 Months Ended 12 Months Ended
Jan. 12, 2016
USD ($)
Jan. 12, 2016
BRL (R$)
Jul. 13, 2015
USD ($)
Mar. 05, 2012
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2020
BRL (R$)
Nov. 22, 2016
USD ($)
Nov. 22, 2016
BRL (R$)
Dec. 31, 2020
USD ($)
Dec. 31, 2020
BRL (R$)
Loss Contingencies [Line Items]                    
Amount of compensation to plaintiff       $ 9,300            
ILS [Member]                    
Loss Contingencies [Line Items]                    
Amount of compensation to plaintiff       $ 30,000            
Unfavorable Regulatory Action FUST Contribution [Member]                    
Loss Contingencies [Line Items]                    
Additional tax assessment $ 686,000                  
Aggregate tax assessment                 $ 3,130,000  
Unfavorable Regulatory Action FUST Contribution [Member] | Tax Year 2007 and 2008 [Member]                    
Loss Contingencies [Line Items]                    
Previous tax assessment                 1,020,000  
Unfavorable Regulatory Action FUST Contribution [Member] | Tax Year 2010 [Member]                    
Loss Contingencies [Line Items]                    
Previous tax assessment                 714,000  
Unfavorable Regulatory Action FUST Contribution [Member] | Tax Year 2011 and 2012 [Member]                    
Loss Contingencies [Line Items]                    
Previous tax assessment                 712,000  
Unfavorable Regulatory Action FUST Contribution [Member] | Brazil, Brazil Real                    
Loss Contingencies [Line Items]                    
Additional tax assessment | R$   R$ 3,564,031                
Aggregate tax assessment | R$                   R$ 16,280,000
Unfavorable Regulatory Action FUST Contribution [Member] | Brazil, Brazil Real | Tax Year 2007 and 2008 [Member]                    
Loss Contingencies [Line Items]                    
Previous tax assessment | R$                   5,310,332
Unfavorable Regulatory Action FUST Contribution [Member] | Brazil, Brazil Real | Tax Year 2010 [Member]                    
Loss Contingencies [Line Items]                    
Previous tax assessment | R$                   3,708,869
Unfavorable Regulatory Action FUST Contribution [Member] | Brazil, Brazil Real | Tax Year 2011 and 2012 [Member]                    
Loss Contingencies [Line Items]                    
Previous tax assessment | R$                   3,701,330
Unfavorable Regulatory Action [Member]                    
Loss Contingencies [Line Items]                    
Total amount claimed     $ 93,000,000              
Unfavorable Regulatory Action [Member] | ILS [Member]                    
Loss Contingencies [Line Items]                    
Total amount claimed     $ 300,000,000              
Unfavorable Regulatory Action FUNTELL Contribution [Member]                    
Loss Contingencies [Line Items]                    
Additional tax assessment             $ 281,000      
Aggregate tax assessment                 930,000  
Unfavorable Regulatory Action FUNTELL Contribution [Member] | Tax Year 2007 and 2008 [Member]                    
Loss Contingencies [Line Items]                    
Previous tax assessment                 191,000  
Unfavorable Regulatory Action FUNTELL Contribution [Member] | Tax Year 2010 [Member]                    
Loss Contingencies [Line Items]                    
Previous tax assessment         $ 265,000       $ 188,000  
Unfavorable Regulatory Action FUNTELL Contribution [Member] | Brazil, Brazil Real                    
Loss Contingencies [Line Items]                    
Additional tax assessment | R$               R$ 1,460,827    
Aggregate tax assessment | R$                   4,800,000
Unfavorable Regulatory Action FUNTELL Contribution [Member] | Brazil, Brazil Real | Tax Year 2007 and 2008 [Member]                    
Loss Contingencies [Line Items]                    
Previous tax assessment | R$                   991,613
Unfavorable Regulatory Action FUNTELL Contribution [Member] | Brazil, Brazil Real | Tax Year 2010 [Member]                    
Loss Contingencies [Line Items]                    
Previous tax assessment | R$           R$ 1,377,564       R$ 977,453