INCOME TAXES INCOME TAXES - SPECIAL TAX RATES (Details)	12 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016
Israel
Exemption Period for Income Taxes Attributable to Approved Enterprise	2 years
Israel | Minimum
Period of Reduced Income Tax Rate for Income Attributable to Approved Enterprise	5 years
Reduced Income Tax Rate for Income Attributable to Approved Enterprise	10.00%
Israel | Maximum
Period of Reduced Income Tax Rate for Income Attributable to Approved Enterprise	8 years
Reduced Income Tax Rate for Income Attributable to Approved Enterprise	25.00%
Cyprus
Effective Income Tax Rate Decrease Due to Tax Incentive	17.80%	12.40%	51.00%