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CONTINGENT LIABILITIES (Brazilian Internal Revenue Service) (Details)
1 Months Ended
Jun. 24, 2010
USD ($)
Jun. 24, 2010
BRL (R$)
Oct. 01, 2005
USD ($)
Apr. 30, 2018
USD ($)
Apr. 30, 2018
BRL (R$)
Loss Contingencies [Line Items]          
Offsetting amount     $ 2,100,000    
Tax Assessment [Member] | Brazilian Internal Revenue Service [Member]          
Loss Contingencies [Line Items]          
Amount of possible loss $ 3,120,000        
Tax Assessment [Member] | Brazilian Internal Revenue Service [Member] | Subsequent Event [Member]          
Loss Contingencies [Line Items]          
Estimated amount of aggregate sum claimed pursuant to the tax assessment (principal amount, interest and penalties)       $ 3,650,000  
Tax Assessment [Member] | Brazilian Internal Revenue Service [Member] | Brazil, Brazil Real          
Loss Contingencies [Line Items]          
Amount of possible loss | R$   R$ 5,567,032      
Tax Assessment [Member] | Brazilian Internal Revenue Service [Member] | Brazil, Brazil Real | Subsequent Event [Member]          
Loss Contingencies [Line Items]          
Estimated amount of aggregate sum claimed pursuant to the tax assessment (principal amount, interest and penalties) | R$         R$ 12,100,000