Results of Operations (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Equity Method Investments And Joint Ventures [Abstract]
Revenue	$ 8,763	[1]	$ 48,316	[2]	$ 89,958
Net income (loss)	(1,110)	[1]	(9,238)	[2]	(20,159)
Equity income (loss) excluding impairments and amortization of intangible assets	(632)	[1]	(2,798)	[2]	(7,518)
Amortization of intangible assets	(144)	[1]	(165)	[2]	(1,154)
Total equity income (loss)	$ (776)	[1]	$ (2,963)	[2]	$ (8,672)

[1] Includes Acquirgy and CIML (through September 30, 2014, the date of disposition).

[2] Includes Acquirgy, CIML, Freeborders (through October 18, 2013, the date of disposition) and WhiteFence (through October 28, 2013, the date of disposition).