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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

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