Intangible Assets - Schedule of Amortizable Purchased Intangible Assets from Acquisition (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Finite-Lived Intangible Assets [Line Items]
Gross	$ 42,520	$ 42,520
Accumulated Amortization	(10,752)	(9,856)
Accumulated Impairment	(29,749)	(29,749)
Net	2,019	2,915
Developed technologies [Member]
Finite-Lived Intangible Assets [Line Items]
Gross	26,000	26,000
Accumulated Amortization	(6,120)	(5,786)
Accumulated Impairment	(19,547)	(19,547)
Net	333	667
Trade name [Member]
Finite-Lived Intangible Assets [Line Items]
Gross	12,800	12,800
Accumulated Amortization	(2,665)	(2,147)
Accumulated Impairment	(8,582)	(8,582)
Net	1,553	2,071
Other [Member]
Finite-Lived Intangible Assets [Line Items]
Gross	3,720	3,720
Accumulated Amortization	(1,967)	(1,923)
Accumulated Impairment	(1,620)	(1,620)
Net	$ 133	$ 177