Description of Business - Additional Information (Detail) (USD $)	0 Months Ended				0 Months Ended	12 Months Ended				0 Months Ended		0 Months Ended		0 Months Ended				0 Months Ended		0 Months Ended
	Jan. 31, 2013	Mar. 07, 2013	Jul. 31, 2014 Tyngsborough Massachusetts acre	Jul. 31, 2014 Tyngsborough Massachusetts Termination of Restated Purchase and Sale Agreement with Tyngsborough Commons, LLC acre	Jul. 29, 2014 Liquidation Basis of Accounting	Jul. 31, 2014 Liquidation Basis of Accounting	Jul. 29, 2014 Liquidation Basis of Accounting	Jul. 02, 2014 Liquidation Basis of Accounting	Oct. 02, 2014 Subsequent Event Tyngsborough Massachusetts	Feb. 28, 2014 Patent Sale Agreement with Dragon Intellectual Property, LLC	Feb. 28, 2014 Patent Sale Agreement with Dragon Intellectual Property, LLC Patent	May 22, 2014 Patent Sale Agreement with Citrix Systems, Inc.	May 22, 2014 Patent Sale Agreement with Citrix Systems, Inc. Patent	Mar. 05, 2014 Asset Sale Agreement	Feb. 27, 2014 Asset Sale Agreement	May 28, 2013 Asset Sale Agreement	May 28, 2013 Asset Sale Agreement	Oct. 10, 2014 Asset Sale Agreement Subsequent Event Tyngsborough Massachusetts	Oct. 10, 2014 Asset Sale Agreement Subsequent Event Tyngsborough Massachusetts	Jan. 31, 2013 Asset Sale Agreement Assets (the "Asset Sale") primarily related to the Intelligent Bandwidth Management Business
Entity Information [Line Items]
Sale of facilities and assets, value	$ 18,750,000																			$ 18,750,000
Total dispute amount under asset sale agreement																	1,450,000
Amount received from total dispute amount under asset sale agreement															1,110,000
Total amount awarded to company														1,110,000
Undisputed amounts paid																1,690,000
Common stock, par value		$ 0.001
Patent sale agreement, number of patents											40		3
Patent sale agreement, number of patent applications											2		6
Amount received from sale of patents										2,000,000		300,000
Ownership of land			102	102
Estimated potential betterment fee relating to Tyngsborough Land									3,470,000
Sale of facilities and assets, value																			2,500,000
Nonrefundable deposit to escrow agent																		50,000
Future escrow deposit on or before December 1, 2014																		50,000
Maximum amount payable on breaches of such representations and warranties or obligations																			75,000
Expected date to complete sale																		Dec. 31, 2014
Additional deposit payment for extension to complete sale																		100,000
Purchase Agreement expected period of extension to complete sale																		Feb. 27, 2015
Liquidating cash distribution, per share							$ 0.24
Liquidating cash distribution					6,930,000	6,932,000
Anticipated wind down costs and expenses								6,200,000
Contingent and unknown liabilities and other possible charges and expenses								$ 6,500,000