Reserve for Estimated Costs (Detail) (Liquidation Basis of Accounting, USD $) In Thousands, unless otherwise specified	Jan. 24, 2015	Jul. 31, 2014
Accrued Expenses [Line Items]
Reserve for estimated costs during the Dissolution period	$ 2,457	$ 3,462
Compensation
Accrued Expenses [Line Items]
Reserve for estimated costs during the Dissolution period	526	1,004
Professional fees
Accrued Expenses [Line Items]
Reserve for estimated costs during the Dissolution period	876	1,154
Other expenses associated with wind down activities
Accrued Expenses [Line Items]
Reserve for estimated costs during the Dissolution period	869	1,010
Insurance
Accrued Expenses [Line Items]
Reserve for estimated costs during the Dissolution period	$ 186	$ 294