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SIGNIFICANT ACCOUNTING POLICIES (business combinations and prepaid product discounts) (Details)
 12 Months Ended
Dec. 31, 2019
Business ccmbinations  
Measurement period 1 year
Maximum [Member]  
Prepaid product discounts [Line Items]  
Amortization period 14 years 6 months
Weighted-average [Member]  
Prepaid product discounts [Line Items]  
Amortization period 6 years