Results of Operations (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
Schedule Of Equity Method Investments [Line Items]
Revenue	$ 15,353	[1]	$ 16,049	[2]	$ 40,948	[3]	$ 75,154	[2]
Net income (loss)	(750)	[1]	(2,993)	[2]	(5,938)	[3]	(15,554)	[2]
Equity income (loss) excluding impairments and amortization of intangible assets	(247)	[1]	(1,325)	[2]	(1,802)	[3]	(6,272)	[2]
Amortization of intangible assets	(48)	[1]	(283)	[2]	(117)	[3]	(875)	[2]
Total equity income (loss)	$ (295)	[1]	$ (1,608)	[2]	$ (1,919)	[3]	$ (7,147)	[2]

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

[2] Includes Acquirgy, Bolt, CIML, Freeborders, GoIndustry-DoveBid plc (“GoIndustry”) (to July 5, 2012, the date of disposition) and WhiteFence.

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