Intangible Assets - Intangibles (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Finite and Indefiite-Lived Intangible Assets [Line Items]
Total finite and indefinite-lived intangible assets, gross	$ 5,674		$ 5,674		$ 5,674
Accumulated amortization	(1,820)		(1,820)		(1,416)
Intangibles, net	3,854		3,854		4,258
Amortization of Intangible Assets	142	147	404	379
In-process research and development
Finite and Indefiite-Lived Intangible Assets [Line Items]
Indefinite-lived Intangible Assets	0		0		159
Tradename
Finite and Indefiite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, useful life (in years)			7 years
Finite-lived intangible assets, gross	435		435		435
Patents and technological know-how
Finite and Indefiite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, useful life (in years)			10 years
Finite-lived intangible assets, gross	2,070		2,070		2,070
Proprietary software
Finite and Indefiite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	3,120		3,120		2,961
Other
Finite and Indefiite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, useful life (in years)			5 years
Finite-lived intangible assets, gross	$ 49		$ 49		$ 49
Minimum
Finite and Indefiite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, useful life (in years)			3 years
Maximum
Finite and Indefiite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, useful life (in years)			15 years