SIGNIFICANT ACCOUNTING POLICIES (Details) - USD ($) $ in Millions	6 Months Ended
	Apr. 30, 2016	Apr. 30, 2015
Significant Accounting Policies [Line Items]
Carrying value of minority equity interest	$ 2.0
Expected economic lives of finite-lived intangible assets, maximum (in years)	7 years
Expected number of years Spares usage cost is expensed (in years)	4 years
Percentage of revenue recognized using percent-of-completion method	0.40%	1.70%
One-time employee termination benefits related service period (more than 60 days)	60 days
Maximum
Significant Accounting Policies [Line Items]
Measurement period for marketable debt securities (in years)	1 year
Derivative maturity (in months)	12 months
Maximum | Equipment, furniture and fixtures
Significant Accounting Policies [Line Items]
Estimated useful lives capitalized and amortized straight-line (in years)	5 years
Maximum | Software and Website Development
Significant Accounting Policies [Line Items]
Estimated useful lives capitalized and amortized straight-line (in years)	5 years
Minimum | Equipment, furniture and fixtures
Significant Accounting Policies [Line Items]
Estimated useful lives capitalized and amortized straight-line (in years)	2 years
Minimum | Software and Website Development
Significant Accounting Policies [Line Items]
Estimated useful lives capitalized and amortized straight-line (in years)	2 years