Liquidation Basis of Accounting - Additional Information (Detail) - USD ($)	3 Months Ended
	Oct. 31, 2015	Jul. 31, 2015
Statutory Accounting Practices [Line Items]
Net assets in liquidation	$ 10,080,000	$ 10,080,000
Cash and cash equivalents	10,807,000
Land	2,500,000
Other assets	47,000
Accounts payable	238,000
Accrued expenses	47,000
Reserve for estimated costs during the Dissolution period	1,402,000
Other liabilities	1,587,000
Increase (Decrease) in estimated realizable value for other assets	0
Net Assets
Statutory Accounting Practices [Line Items]
Increase (Decrease) in estimated realizable value for other assets	0
IQstream Patents
Statutory Accounting Practices [Line Items]
Net assets in liquidation	$ 0