Results of Operations (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2013		Jun. 30, 2012
Schedule Of Equity Method Investments [Line Items]
Revenue	$ 12,490	[1]	$ 29,751	[2]	$ 25,595	[3]	$ 59,105	[2]
Net income (loss)	(2,976)	[1]	(7,094)	[2]	(5,114)	[3]	(12,561)	[2]
Equity income (loss) excluding impairments and amortization of intangible assets	(875)	[1]	(2,909)	[2]	(1,555)	[3]	(4,947)	[2]
Amortization of intangible assets	(48)	[1]	(327)	[2]	(69)	[3]	(592)	[2]
Total equity income (loss)	$ (923)	[1]	$ (3,236)	[2]	$ (1,624)	[3]	$ (5,539)	[2]

[1] Includes Acquirgy, CIML, Freeborders and WhiteFence.

[2] Includes Acquirgy, Bolt, CIML, Freeborders, GoIndustry-DoveBid plc (“GoIndustry”) and WhiteFence.

[3] Includes Acquirgy, CIML (from February 20, 2013, the date of deconsolidation), Freeborders and WhiteFence.