NATURE OF OPERATIONS - Nature of Operations (Detail) - USD ($) $ in Millions	Oct. 31, 2019	Jul. 31, 2019
Nature Of Operations [Line Items]
Cash and cash equivalents	$ 41.2	$ 32.5
Working capital	(42.5)
PNC Bank Credit Facility
Nature Of Operations [Line Items]
Credit facility, readily available borrowing capacity	7.2
Cerberus Credit Facility
Nature Of Operations [Line Items]
Credit facility, readily available borrowing capacity	$ 23.0