FAIR VALUE OF FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS - Fair Value Disclosure, Nonrecurring (Details) - Fair value, measurements, nonrecurring $ in Thousands	Apr. 30, 2017 USD ($)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets held for sale(2)	$ 499
Total assets	499
Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets held for sale(2)	0
Total assets	0
Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets held for sale(2)	0
Total assets	0
Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets held for sale(2)	499
Total assets	$ 499