Goodwill and Intangible Assets, Net - Finite-Lived Intangibles (Details) (USD $)	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Finite-Lived Intangible Assets, Net [Abstract]
Gross	$ 42,338,000		$ 42,530,000
Accumulated Amortization	(15,375,000)		(12,695,000)
Intangible assets, net	26,963,000		29,835,000
Finite-lived intangible assets, fully amortized, gross	6,600,000		9,100,000
Amortization expense	4,127,000		4,174,000		4,246,000
Minimum
Finite-Lived Intangible Assets, Net [Abstract]
Intangible asset, estimated period of benefit	1 year
Maximum
Finite-Lived Intangible Assets, Net [Abstract]
Intangible asset, estimated period of benefit	15 years
Cost of sales
Finite-Lived Intangible Assets, Net [Abstract]
Amortization expense	213,000		312,000		451,000
Selling, general and administrative
Finite-Lived Intangible Assets, Net [Abstract]
Amortization expense	3,914,000		3,862,000		3,795,000
Distribution rights
Finite-Lived Intangible Assets, Net [Abstract]
Gross	395,000	[1]	378,000	[1]
Accumulated Amortization	(52,000)	[1]	(50,000)	[1]
Intangible assets, net	343,000	[1]	328,000	[1]
Intangible asset, estimated period of benefit	10 years
Patents
Finite-Lived Intangible Assets, Net [Abstract]
Gross	8,879,000	[1]	8,113,000	[1]
Accumulated Amortization	(4,251,000)	[1]	(3,847,000)	[1]
Intangible assets, net	4,628,000	[1]	4,266,000	[1]
Intangible asset, estimated period of benefit	10 years
Trademark and trade names
Finite-Lived Intangible Assets, Net [Abstract]
Gross	2,841,000	[1]	2,841,000	[1]
Accumulated Amortization	(1,411,000)	[1]	(1,127,000)	[1]
Intangible assets, net	1,430,000	[1]	1,714,000	[1]
Intangible asset, estimated period of benefit	10 years
Developed and core technology
Finite-Lived Intangible Assets, Net [Abstract]
Gross	3,506,000	[1]	3,507,000	[1]
Accumulated Amortization	(1,140,000)	[1]	(906,000)	[1]
Intangible assets, net	2,366,000	[1]	2,601,000	[1]
Developed and core technology | Minimum
Finite-Lived Intangible Assets, Net [Abstract]
Intangible asset, estimated period of benefit	5 years
Developed and core technology | Maximum
Finite-Lived Intangible Assets, Net [Abstract]
Intangible asset, estimated period of benefit	15 years
Capitalized software development costs
Finite-Lived Intangible Assets, Net [Abstract]
Gross	311,000	[1]	1,276,000	[1]
Accumulated Amortization	(133,000)	[1]	(913,000)	[1]
Intangible assets, net	178,000	[1]	363,000	[1]
Capitalized software development costs | Minimum
Finite-Lived Intangible Assets, Net [Abstract]
Intangible asset, estimated period of benefit	1 year
Capitalized software development costs | Maximum
Finite-Lived Intangible Assets, Net [Abstract]
Intangible asset, estimated period of benefit	2 years
Customer relationships
Finite-Lived Intangible Assets, Net [Abstract]
Gross	26,406,000	[1]	26,415,000	[1]
Accumulated Amortization	(8,388,000)	[1]	(5,852,000)	[1]
Intangible assets, net	$ 18,018,000	[1]	$ 20,563,000	[1]
Customer relationships | Minimum
Finite-Lived Intangible Assets, Net [Abstract]
Intangible asset, estimated period of benefit	10 years
Customer relationships | Maximum
Finite-Lived Intangible Assets, Net [Abstract]
Intangible asset, estimated period of benefit	15 years

[1] This table excludes the gross value of fully amortized intangible assets totaling $6.6 million and $9.1 million on December 31, 2013 and 2012, respectively.